{"id":7428,"date":"2026-08-07T11:30:25","date_gmt":"2026-08-07T11:30:25","guid":{"rendered":"https:\/\/www.macsonik.com\/blog\/?p=7428"},"modified":"2026-08-07T11:30:38","modified_gmt":"2026-08-07T11:30:38","slug":"fix-kindle-e999-error","status":"publish","type":"post","link":"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/","title":{"rendered":"How to Fix Kindle E999 Error? A Complete Guide"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;7428&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;0&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;0&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this post&quot;,&quot;legend&quot;:&quot;0\\\/5 - (0 votes)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;How to Fix Kindle E999 Error? A Complete Guide&quot;,&quot;width&quot;:&quot;0&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            <span class=\"kksr-muted\">Rate this post<\/span>\n    <\/div>\n    <\/div>\n<p class=\"user-query\"><strong class=\"text-danger\">Introduction:<\/strong> Isn&#8217;t it irritating when you try to send a file to Kindle and the pop-up or email comes with an E999 Error? Now, what&#8217;s next? The next step is to fix Kindle E999 Error. The Kindle E999 error is a common but vague gatekeeper that prevents perfectly good books from reaching your device. Therefore, in this blog, we have covered all the step-by-step optimal processes to fix this error. Alongside this, you will also get to know what the key causes for this are.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_87_1 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #0a0a0a;color:#0a0a0a\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #0a0a0a;color:#0a0a0a\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#What_Exactly_Is_the_Kindle_E999_Error\" >What Exactly Is the Kindle E999 Error?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#Why_does_the_E999_Kindle_Error_Happen\" >Why does the E999 Kindle Error Happen?&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#Proven_Ways_to_Fix_Kindle_E999_Error\" >Proven Ways to Fix Kindle E999 Error<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#1_Restart_Your_Kindle\" >1. Restart Your Kindle<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#Steps_to_Restart_Kindle\" >Steps to Restart Kindle&nbsp;<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#2_Check_Your_Internet_Connection\" >2. Check Your Internet Connection<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#Troubleshooting_E999_via_Internet_Connection\" >Troubleshooting E999 via Internet Connection&nbsp;<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#3_Sync_Your_Kindle_Manually\" >3. Sync Your Kindle Manually<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#How_to_Sync_the_Kindle_Manually\" >How to Sync the Kindle Manually?&nbsp;<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#4_Remove_and_Re-Download_the_Problematic_Book\" >4. Remove and Re-Download the Problematic Book<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#How_to_Remove_and_Re-Download_a_Book\" >How to Remove and Re-Download a Book?&nbsp;<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#5_Update_Kindle_Software\" >5. Update Kindle Software<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#How_to_Update_the_Kindle\" >How to Update the Kindle&nbsp;<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#6_Clear_App_Cache_or_Reinstall_Kindle_App_for_App_Users\" >6. Clear App Cache or Reinstall Kindle App (for App Users)<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#Steps_to_Clear_App_Cache_or_Reinstall_Kindle_App\" >Steps to Clear App Cache or Reinstall Kindle App<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#7_Factory_Reset_Kindle\" >7. Factory Reset Kindle&nbsp;<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#How_to_Back_Up_Kindle_Data_EPUB\" >How to Back Up Kindle Data (EPUB)?&nbsp;<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#Steps_to_Protect_Your_Kindle_Data_EPUB\" >Steps to Protect Your Kindle Data (EPUB)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#Authors_Note\" >Author&rsquo;s Note&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Exactly_Is_the_Kindle_E999_Error\"><\/span>What Exactly Is the Kindle E999 Error?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Think that Amazon&rsquo;s Kindle is a library. Plus, the <strong>Send to Kindle<\/strong> system is a highly efficient, but very particular, <strong>library curator<\/strong>. When you email a book, this curator inspects it thoroughly before placing it on your personal shelf.<\/p>\n<p><strong><em>The E999 error is the curator&rsquo;s generic stamp of rejection<\/em><\/strong>. It&rsquo;s not a specific complaint like this book is in the wrong language or the cover is torn. It&rsquo;s more like a frustrated update that <strong><em>I can&#8217;t process this. Something is wrong.<\/em><\/strong><\/p>\n<p>In technical terms, <strong>E999 is a catch-all error code<\/strong> indicating that Amazon&rsquo;s servers encountered an issue while parsing and converting your ebook file for Kindle compatibility. The file is, in some way, malformed or incomplete.<\/p>\n<div style=\"background-color: #f0f7ff; border-left: 4px solid #0d6efd; padding: 16px 20px; margin: 25px 0; font-family: Arial, sans-serif; font-size: 15px; line-height: 1.8; color: #333; border-radius: 6px;\"><strong style=\"color: #0d6efd;\">Protect Kindle Data<\/strong><br \/> The best way to protect your Kindle data (EPUB) is to <strong>save it in different required formats<\/strong>. The <strong><a style=\"color: #0073aa; text-decoration: none;\" href=\"https:\/\/www.macsonik.com\/epub-converter\/\" target=\"_blank\" rel=\"noopener\"> MacSonik EPUB Converter <\/a><\/strong> easily converts EPUB files to PDF, DOC, JPEG, and over 10 other formats. With batch conversion and folder hierarchy preservation, it works across all Windows &amp; Mac OS versions.<\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_does_the_E999_Kindle_Error_Happen\"><\/span>Why does the E999 Kindle Error Happen?&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Before we dive into the solution to fix Kindle E999 error, it is very important to understand the causes of this error.&nbsp;<\/p>\n<ul>\n<li><strong>Missing language metadata &#8211; <\/strong>File lacks the required language tag (most common cause)<\/li>\n<li><strong>Invalid code &#8211;<\/strong> Broken HTML\/CSS inside the ebook file<\/li>\n<li><strong>Corrupted file &#8211;<\/strong> Damaged during download or transfer<\/li>\n<li><strong>Unsupported formatting <\/strong>&#8211; Complex layouts, custom fonts, or unusual elements that Amazon can&#8217;t process.<\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Proven_Ways_to_Fix_Kindle_E999_Error\"><\/span>Proven Ways to Fix Kindle E999 Error<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>This section will cover the tried and tested methods to solve this E999 issue. However, it&#8217;s a temporary error; still, we need the right approach to fix this. Try these quick techniques to fix Error999 &#8211; Send to Kindle Failing<\/p>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Restart_Your_Kindle\"><\/span>1. Restart Your Kindle<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A quick restart is the simplest and most effective fix for temporary software glitches (E999 send to Kindle Internal error epub).&nbsp;<\/p>\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Steps_to_Restart_Kindle\"><\/span>Steps to Restart Kindle&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Press and hold the <strong>Power<\/strong> button for about <strong>40 seconds<\/strong> until the screen goes blank.<\/li>\n<li>Then, <strong>release the button<\/strong> and let the device restart automatically.<\/li>\n<li>Once <strong>it&rsquo;s back on<\/strong>, check if the error has disappeared.<\/li>\n<\/ul>\n<div style=\"background-color: #fff8e1; border-left: 4px solid #ffc107; padding: 14px 18px; margin: 25px 0; font-family: Arial, sans-serif; font-size: 15px; line-height: 1.8; color: #333; border-radius: 6px;\"><strong style=\"color: #ff9800;\">Note:<\/strong> If your Kindle doesn&rsquo;t restart automatically, press the power button again to turn it on manually.<\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Check_Your_Internet_Connection\"><\/span>2. Check Your Internet Connection<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Poor or unstable Wi-Fi can interrupt downloads or syncing, triggering the E999 error.<\/p>\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Troubleshooting_E999_via_Internet_Connection\"><\/span>Troubleshooting E999 via Internet Connection&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Ensure your Kindle is connected to a <strong>strong and stable Wi-Fi<\/strong> network.<\/li>\n<li>If you&rsquo;re using mobile data (via the app), <strong>switch to Wi-Fi<\/strong>.<\/li>\n<li>Thereafter, <strong>restart your router<\/strong> or <strong>connect to a different network<\/strong> if the issue persists.<\/li>\n<\/ul>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Sync_Your_Kindle_Manually\"><\/span>3. Sync Your Kindle Manually<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sometimes, Kindle loses connection with Amazon&rsquo;s servers. A manual sync can fix Kindle E999 Error&nbsp;<\/p>\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Sync_the_Kindle_Manually\"><\/span>How to Sync the Kindle Manually?&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Firstly, open <strong>Settings &rarr; Sync My Kindle<\/strong>.<\/li>\n<li>Then, <strong>wait for a few seconds<\/strong> while the device reconnects and updates your library.<\/li>\n<li>Once done, <strong>reopen the eBook <\/strong>or app to check if it works properly.<\/li>\n<\/ul>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Remove_and_Re-Download_the_Problematic_Book\"><\/span>4. Remove and Re-Download the Problematic Book<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A corrupted book file can also trigger this error. Resolving Kindle Internal Error E999 by removing &amp; redownloading the book.&nbsp;<\/p>\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Remove_and_Re-Download_a_Book\"><\/span>How to Remove and Re-Download a Book?&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>From your Kindle&rsquo;s home screen, <strong>long-press the book title<\/strong> and choose <strong>Remove Download<\/strong>.<\/li>\n<li>Go to <strong>Your Library<\/strong> on Amazon and re-download the same book.<\/li>\n<li>Once the download completes, <strong>open it again <\/strong>and check if the error is gone.<\/li>\n<\/ul>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Update_Kindle_Software\"><\/span>5. Update Kindle Software<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Using an outdated software version may cause Kindle errors related to E999. Therefore, the update is the solution.&nbsp;<\/p>\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Update_the_Kindle\"><\/span>How to Update the Kindle&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Go to <strong>Settings &rarr; Device Options &rarr; Advanced Options &rarr; Update Your Kindle<\/strong>.<\/li>\n<li>If the <strong>option is greyed out<\/strong>, connect your Kindle to Wi-Fi and wait for the update to become available.<\/li>\n<li>Once updated, restart the device and verify the fix.<\/li>\n<\/ul>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_Clear_App_Cache_or_Reinstall_Kindle_App_for_App_Users\"><\/span>6. Clear App Cache or Reinstall Kindle App <em>(for App Users)<\/em><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If you&rsquo;re facing this issue on the Kindle app (Android, iOS, or PC), it might be due to cached data or corrupted files. To E999 Kindle error reset, you just need to follow the steps below.&nbsp;<\/p>\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Steps_to_Clear_App_Cache_or_Reinstall_Kindle_App\"><\/span>Steps to Clear App Cache or Reinstall Kindle App<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>By opening <strong>Device Settings &rarr; Apps &rarr; Kindle &rarr; Storage<\/strong>.<\/li>\n<li>Tap <strong>Clear Cache<\/strong> and <strong>Clear Data<\/strong>.<\/li>\n<li>If that doesn&rsquo;t help, <strong>uninstall and reinstall<\/strong> the app, then sign back in to your Amazon account.<\/li>\n<\/ul>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Factory_Reset_Kindle\"><\/span>7. Factory Reset Kindle&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If none of the above methods work, a full reset may be necessary to fix Kindle E999 Error. This erases all downloaded books and settings, so back up your files first.<br \/>How to Factory Reset Kindle?&nbsp;<\/p>\n<ul>\n<li>Firstly, go to <strong>Settings &rarr; Device Options &rarr; Reset<\/strong>.<\/li>\n<li>Then, confirm <strong>when prompted<\/strong> and <strong>wait for your Kindle to restart<\/strong>.<\/li>\n<li>After reset, <strong>re-register your Kindle<\/strong> with your Amazon account and re-download your books.<\/li>\n<\/ul>\n<p>These are the best troubleshooting steps for Kindle Error E999. These will ensure that you have a smooth experience with <a href=\"https:\/\/www.amazon.com\/kindle\"><strong>Kindle<\/strong><\/a>.&nbsp;<\/p>\n<p>But in case you feel like you want to keep your data saved locally to protect it or for offline viewing. You can save your Kindle Data files to a more suitable file format, such as <a href=\"https:\/\/www.macsonik.com\/blog\/convert-epub-to-word\/\"><strong>Word<\/strong><\/a><strong>.&nbsp;<\/strong><\/p>\n<div style=\"background-color: #f0f7ff; border-left: 4px solid #0d6efd; padding: 16px 20px; margin: 25px 0; font-family: Arial, sans-serif; font-size: 15px; line-height: 1.8; color: #333; border-radius: 6px;\"><strong style=\"color: #0d6efd;\">File Formats Supported By Kindle<\/strong><br \/> Kindle supports various file formats for eBooks and documents:<br \/> &bull; AZW \/ AZW3 \/ KFX<br \/> &bull; MOBI &amp; PRC<br \/> &bull; EPUB<\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Back_Up_Kindle_Data_EPUB\"><\/span>How to Back Up Kindle Data (EPUB)?&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The best way to protect your Kindle Data is to take a backup of this data. Here comes <strong>MacSonik EPUB Converter<\/strong>, which easily converts your <a href=\"https:\/\/www.macsonik.com\/blog\/convert-epub-to-pdf\/\"><strong>EPUB files to PDF<\/strong><\/a>, DOC, JPEG, and 10+ other formats. Plus, this user-friendly tool preserves folder structure and supports batch conversion for multiple files at once.&nbsp;<\/p>\n<div class=\"row justify-content-center ms_btn_sec my-3\">\n<div class=\"col-md-6\">\n<ul class=\"nav nav-tabs justify-content-center mb-3\" id=\"myTab\" role=\"tablist\">\n<li class=\"nav-item\"><a class=\"nav-link px-4 rounded-0 text-dark active\" id=\"mac-tab\" data-toggle=\"tab\" href=\"#mac\" role=\"tab\" aria-controls=\"mac\" aria-selected=\"true\"><i class=\"icon-apple\"><\/i> Mac<\/a><\/li>\n<li class=\"nav-item\"><a class=\"nav-link px-4 rounded-0 text-dark\" id=\"windows-tab\" data-toggle=\"tab\" href=\"#windows\" role=\"tab\" aria-controls=\"windows\" aria-selected=\"false\"><i class=\"icon-windows\"><\/i> Windows<\/a><\/li>\n<\/ul>\n<div class=\"tab-content text-center\" id=\"myTabContent\">\n<div class=\"tab-pane fade show active\" id=\"mac\" role=\"tabpanel\" aria-labelledby=\"mac-tab\"><a href=\"https:\/\/www.macsonik.com\/dl\/Macsonik-EPUB-Converter.dmg\" class=\"btn btn-download mr-3\"><i class=\"icon-download-1\"><\/i> Download Now<\/a><a href=\"https:\/\/www.macsonik.com\/epub-converter\/buy.php\" class=\"btn btn-buy\"><i class=\"icon-basket\"><\/i> Purchase Now<\/a><\/div>\n<div class=\"tab-pane fade\" id=\"windows\" role=\"tabpanel\" aria-labelledby=\"windows-tab\"><a href=\"https:\/\/www.macsonik.com\/dl\/macsonik-epub-converter-win.exe\" class=\"btn btn-download mr-3\"><i class=\"icon-download-1\"><\/i> Download Now<\/a><a href=\"https:\/\/www.macsonik.com\/epub-converter\/buy.php\" class=\"btn btn-buy\"><i class=\"icon-basket\"><\/i> Purchase Now<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Steps_to_Protect_Your_Kindle_Data_EPUB\"><\/span>Steps to Protect Your Kindle Data (EPUB)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<li>First, launch <strong>MacSonik EPUB Converter.<\/strong><\/li>\n<li>Then, upload <strong>your EPUB<\/strong> files.<\/li>\n<li>Next, select <strong>PDF <\/strong>as your output format.<\/li>\n<li>After that, choose your <strong>destination folder.<\/strong><\/li>\n<li>Finally, start the conversion process by clicking<strong> Convert<\/strong>.&nbsp;<\/li>\n<\/ol>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Authors_Note\"><\/span>Author&rsquo;s Note&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The Kindle Error E99 must not derail your reading experience. You can follow the seven solutions outlined above to fix Kindle E999 Error.&nbsp; Most problems stem from connectivity glitches, corrupted files, or outdated software, all of which are easily fixable.<\/p>\n\n<p>Don&#8217;t forget to safeguard your digital library by converting and backing up your EPUB files in multiple formats. This ensures you&#8217;ll always have access to your books, regardless of device or platform. Now that you know how to tackle the E999 error, you&#8217;re equipped to handle future Kindle hiccups with confidence.<\/p>\n<div style=\"background-color:#f0f7ff; border-left:4px solid #0d6efd; padding:16px 20px; margin:25px 0;\n            font-family:Arial, sans-serif; font-size:15px; line-height:1.8; color:#333; border-radius:6px;\">\n  Keep your Kindle updated, your files clean, and your books backed up with \n  <a href=\"https:\/\/www.macsonik.com\/epub-converter\/\" target=\"_blank\" style=\"color:#0073aa; text-decoration:none; font-weight:bold;\">\n    MacSonik EPUB Converter\n  <\/a>, and E999 will never interrupt your reading again.\n<\/div>\n<h2 class=\"faq_heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1762767199177\"><strong class=\"schema-faq-question\">Q1. Why am I getting the E999 error on my Kindle when sending an EPUB file?<\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> The E999 error usually appears when Amazon\u2019s server fails to process your EPUB file during conversion. This can happen due to missing metadata, corrupted file structure, or unsupported formatting. To fix it, check your internet connection, restart your Kindle, or try converting the EPUB file using a reliable tool like <strong>MacSonik EPUB Converter<\/strong> before sending it again.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1762767221708\"><strong class=\"schema-faq-question\">Q2. Can I prevent the Kindle E999 error from happening in the future?<\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Yes. Always make sure your Kindle software is up to date, your Wi-Fi connection is stable, and your files are properly formatted. Before sending an eBook, validate the EPUB file or convert it into a Kindle-supported format (like AZW3 or MOBI). Regularly backing up and organizing your files can also minimize such issues.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Introduction: Isn&#8217;t it irritating when you try to send a file to Kindle and the pop-up or email comes with<a class=\"read-more ml-1 main-read-more\" href=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/\">Read More<\/a><\/p>\n","protected":false},"author":17,"featured_media":7430,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-7428","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-epub-converter"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Fix Kindle E999 Error? 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Read the blog till the end and discover the best methods to troubleshooting Kindle E999 error.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/\" \/>\n<meta property=\"og:site_name\" content=\"MacSonik\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/MacSonik-109117510972403\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-07T11:30:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-07T11:30:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.macsonik.com\/blog\/wp-content\/uploads\/2025\/11\/how-to-fix-kindle-e999-error.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"628\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Neeru Kuchhal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@sonikmac\" \/>\n<meta name=\"twitter:site\" content=\"@sonikmac\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Neeru Kuchhal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.macsonik.com\\\/blog\\\/fix-kindle-e999-error\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.macsonik.com\\\/blog\\\/fix-kindle-e999-error\\\/\"},\"author\":{\"name\":\"Neeru Kuchhal\",\"@id\":\"https:\\\/\\\/www.macsonik.com\\\/blog\\\/#\\\/schema\\\/person\\\/c4e34208d2f1a47a04667d3e3f152e90\"},\"headline\":\"How to Fix Kindle E999 Error? 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A Complete Guide"}]},{"@type":"WebSite","@id":"https:\/\/www.macsonik.com\/blog\/#website","url":"https:\/\/www.macsonik.com\/blog\/","name":"MacSonik","description":"MacSonik Software Latest Updates &amp; Information for Mac","publisher":{"@id":"https:\/\/www.macsonik.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.macsonik.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.macsonik.com\/blog\/#organization","name":"MacSonik Software","url":"https:\/\/www.macsonik.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.macsonik.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.macsonik.com\/blog\/wp-content\/uploads\/2020\/12\/cropped-macsonik.png","contentUrl":"https:\/\/www.macsonik.com\/blog\/wp-content\/uploads\/2020\/12\/cropped-macsonik.png","width":116,"height":41,"caption":"MacSonik Software"},"image":{"@id":"https:\/\/www.macsonik.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/MacSonik-109117510972403\/","https:\/\/x.com\/sonikmac","https:\/\/www.linkedin.com\/company\/macsonik"]},{"@type":"Person","@id":"https:\/\/www.macsonik.com\/blog\/#\/schema\/person\/c4e34208d2f1a47a04667d3e3f152e90","name":"Neeru Kuchhal","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/c81cec2489670600b19c388ae70418b5cce8ef31de6110624a86721d44f8423f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c81cec2489670600b19c388ae70418b5cce8ef31de6110624a86721d44f8423f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/c81cec2489670600b19c388ae70418b5cce8ef31de6110624a86721d44f8423f?s=96&d=mm&r=g","caption":"Neeru Kuchhal"},"sameAs":["https:\/\/www.macsonik.com\/blog","https:\/\/www.linkedin.com\/in\/neerukuchhal"],"url":"https:\/\/www.macsonik.com\/blog\/author\/neeru\/"},{"@type":"Question","@id":"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#faq-question-1762767199177","position":1,"url":"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#faq-question-1762767199177","name":"Q1. Why am I getting the E999 error on my Kindle when sending an EPUB file?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans:<\/strong> The E999 error usually appears when Amazon\u2019s server fails to process your EPUB file during conversion. This can happen due to missing metadata, corrupted file structure, or unsupported formatting. To fix it, check your internet connection, restart your Kindle, or try converting the EPUB file using a reliable tool like <strong>MacSonik EPUB Converter<\/strong> before sending it again.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#faq-question-1762767221708","position":2,"url":"https:\/\/www.macsonik.com\/blog\/fix-kindle-e999-error\/#faq-question-1762767221708","name":"Q2. Can I prevent the Kindle E999 error from happening in the future?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans:<\/strong> Yes. Always make sure your Kindle software is up to date, your Wi-Fi connection is stable, and your files are properly formatted. Before sending an eBook, validate the EPUB file or convert it into a Kindle-supported format (like AZW3 or MOBI). Regularly backing up and organizing your files can also minimize such issues.","inLanguage":"en-US"},"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/www.macsonik.com\/blog\/wp-json\/wp\/v2\/posts\/7428","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.macsonik.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.macsonik.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.macsonik.com\/blog\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/www.macsonik.com\/blog\/wp-json\/wp\/v2\/comments?post=7428"}],"version-history":[{"count":1,"href":"https:\/\/www.macsonik.com\/blog\/wp-json\/wp\/v2\/posts\/7428\/revisions"}],"predecessor-version":[{"id":7431,"href":"https:\/\/www.macsonik.com\/blog\/wp-json\/wp\/v2\/posts\/7428\/revisions\/7431"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.macsonik.com\/blog\/wp-json\/wp\/v2\/media\/7430"}],"wp:attachment":[{"href":"https:\/\/www.macsonik.com\/blog\/wp-json\/wp\/v2\/media?parent=7428"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.macsonik.com\/blog\/wp-json\/wp\/v2\/categories?post=7428"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.macsonik.com\/blog\/wp-json\/wp\/v2\/tags?post=7428"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}