{"id":361,"date":"2025-12-18T05:47:15","date_gmt":"2025-12-18T04:47:15","guid":{"rendered":"https:\/\/mybox.com\/help\/?post_type=manual_kb&#038;p=361"},"modified":"2025-12-18T05:47:17","modified_gmt":"2025-12-18T04:47:17","slug":"how-do-i-fix-a-json-error-in-wordpress","status":"publish","type":"manual_kb","link":"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-do-i-fix-a-json-error-in-wordpress\/","title":{"rendered":"How do I fix a JSON error in WordPress?"},"content":{"rendered":"\n<div class=\"translation-block translation-block-merged\">\n<p class=\"wp-block-paragraph\">A JSON error in WordPress is one of the most common problems that can occur when editing or publishing content. This is manifested by the message &#8220;JSON error: Response is invalid&#8221; and usually prevents the entry from being saved or published correctly. In this article, we will discuss the causes of this problem and effective methods to fix it.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-custom 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\"><\/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:\/\/mybox.com\/help\/en\/knowledgebase\/how-do-i-fix-a-json-error-in-wordpress\/#What_does_a_JSON_error_mean_in_WordPress\" >What does a JSON error mean in WordPress?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-do-i-fix-a-json-error-in-wordpress\/#Common_Causes_of_JSON_Error\" >Common Causes of JSON Error<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-do-i-fix-a-json-error-in-wordpress\/#How_do_I_fix_a_JSON_error_in_WordPress\" >How do I fix a JSON error in WordPress?<\/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:\/\/mybox.com\/help\/en\/knowledgebase\/how-do-i-fix-a-json-error-in-wordpress\/#1_Check_the_permalinks_settings\" >1. Check the permalinks settings<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-do-i-fix-a-json-error-in-wordpress\/#2_Make_sure_the_website_works_on_HTTPS\" >2. Make sure the website works on HTTPS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-do-i-fix-a-json-error-in-wordpress\/#3_Disable_problematic_plugins_and_themes\" >3. Disable problematic plugins and themes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-do-i-fix-a-json-error-in-wordpress\/#4_Check_the_htaccess_file\" >4. Check the .htaccess file<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-do-i-fix-a-json-error-in-wordpress\/#5_Use_developer_tools\" >5. Use developer tools<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-do-i-fix-a-json-error-in-wordpress\/#Summary\" >Summary<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_does_a_JSON_error_mean_in_WordPress\"><\/span>What does a JSON error mean in WordPress?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">JSON (JavaScript Object Notation) is a data exchange format used in WordPress for communication between the browser and the server. When the server&#8217;s response does not meet the expected JSON format, WordPress displays the said error. These problems are usually related to incorrect server settings, plugins, or a conflict with the theme.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Causes_of_JSON_Error\"><\/span>Common Causes of JSON Error<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Permalinks settings issues<\/strong>: Incorrect configuration of permalinks can cause a JSON error.<\/li>\n\n\n\n<li><strong>No HTTPS support<\/strong>: WordPress requires a valid SSL certificate for the REST API to work properly.<\/li>\n\n\n\n<li><strong>Plugin and theme conflicts<\/strong>: Incompatible or broken plugins can interfere with the WordPress API.<\/li>\n\n\n\n<li><strong>Errors in the .htaccess file<\/strong>: Improper rules can prevent API requests from being processed.<\/li>\n\n\n\n<li><strong>API Request Blocking Server<\/strong>: Some server settings may prevent you from connecting to the WordPress API.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_do_I_fix_a_JSON_error_in_WordPress\"><\/span>How do I fix a JSON error in WordPress?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Check_the_permalinks_settings\"><\/span>1. Check the permalinks settings<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<\/div>\n\n<div id=\"mybox-47680866\" class=\"mybox-content mybox-entity-placement\"><div class=\"early-access-banner-inpost\">\r\n  <div class=\"banner-left-inpost\">\r\n    <div class=\"icon-box-inpost\">\r\n      <img decoding=\"async\" src=\"https:\/\/mybox.com\/help\/wp-content\/uploads\/2026\/02\/square-info-icon.svg\" alt=\"Info\">\r\n    <\/div>\r\n    <div class=\"text-box-inpost\">\r\n      <span class=\"label-inpost\"><span class=\"translation-block translation-block-banner-text\">Early access<\/span><\/span>\r\n      <h4><span class=\"translation-block translation-block-banner-text\">Still need help?<\/span><\/h4>\r\n      <p><span class=\"translation-block translation-block-banner-text\">Contact our customer service team.<\/span><\/p>\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <div class=\"banner-right-inpost\">\r\n    <a href=\"https:\/\/panel.mybox.com\/helpdesk2\/v\/list\/\" class=\"banner-button-inpost\"><span class=\"translation-block translation-block-banner-text\">Message us<\/span><\/a>\r\n  <\/div>\r\n<\/div><\/div>\n\n<div class=\"translation-block translation-block-merged\"><p class=\"wp-block-paragraph\">Invalid permalinks are one of the most common causes of a JSON error. To improve them:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Go to <strong>Settings > Direct Links<\/strong>.<\/li>\n\n\n\n<li>Select your preferred xref structure and click <strong>Save Changes<\/strong>.<\/li>\n\n\n\n<li>Check if the issue is resolved.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Make_sure_the_website_works_on_HTTPS\"><\/span>2. Make sure the website works on HTTPS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Missing an SSL certificate or incorrect HTTPS configuration can cause problems with the WordPress API. To fix this:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Verify that your website uses HTTPS (URL starts with <code>https:\/\/<\/code>).<\/li>\n\n\n\n<li>If not, set up an SSL certificate on your server.<\/li>\n\n\n\n<li>Change your WordPress settings in <strong>General Settings ><\/strong>by adjusting your page and site URLs to HTTPS.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Disable_problematic_plugins_and_themes\"><\/span>3. Disable problematic plugins and themes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Conflicts between plugins or themes can interfere with the API:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Deactivate all plugins in the admin panel.<\/li>\n\n\n\n<li>Activate them one at a time to identify the problematic plugin.<\/li>\n\n\n\n<li>If that doesn&#8217;t help, switch the theme to the default one, such as &#8220;Twenty Twenty-Three&#8221; to rule out a theme conflict.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Check_the_htaccess_file\"><\/span>4. Check the .htaccess file<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">File <code>.htaccess<\/code> it may contain rules that interfere with the WordPress API:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Log in to the server using FTP or a file manager.<\/li>\n\n\n\n<li>Open the file <code>.htaccess<\/code> in the root directory of WordPress.<\/li>\n\n\n\n<li>Restore its default content as below:<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code># BEGIN WordPress\n\nRewriteEngine On\nRewriteBase \/\nRewriteRule ^index\\.php$ - &#91;L]\nRewriteCond %{REQUEST_FILENAME} !-f\nRewriteCond %{REQUEST_FILENAME} !-d\nRewriteRule . \/index.php &#91;L]\n\n# END WordPress<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Save your changes and see if the problem is gone.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Use_developer_tools\"><\/span>5. Use developer tools<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If you still can&#8217;t find the cause, use the developer tools in your browser:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open the developer tools (usually the F12 key).<\/li>\n\n\n\n<li>Go to the <strong>Console<\/strong> or <strong>Network<\/strong> tab to find the details of the JSON error.<\/li>\n\n\n\n<li>Look for additional information that can help identify the problem.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Summary\"><\/span>Summary<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A JSON error in WordPress can be frustrating, but fortunately, there are plenty of ways to fix it. From simple changes to permalinks settings to more advanced file <code>.htaccess<\/code> modifications or server configuration verification, each of these steps can help restore the full functionality of your website.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the problem persists, consult a WordPress expert or hosting provider. Also, remember to update your plugins, themes, and WordPress itself regularly to avoid similar mistakes in the future.<\/p>\n<\/div>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"template":"","format":"standard","manualknowledgebasecat":[25,58],"manual_kb_tag":[3476,3477,3478,3479,3480,372,3481,550,715,2942,3469,3470,3471,3472,3473,3474,3475],"class_list":["post-361","manual_kb","type-manual_kb","status-publish","format-standard","hentry","manualknowledgebasecat-hosting","manualknowledgebasecat-web-applications-cms","manual_kb_tag-theme-conflicts","manual_kb_tag-json-error","manual_kb_tag-invalid-json-response","manual_kb_tag-rest-api-error","manual_kb_tag-permalink-settings","manual_kb_tag-ssl-certificate","manual_kb_tag-https-site","manual_kb_tag-plugin-conflict","manual_kb_tag-permalinks","manual_kb_tag-plugin-conflicts","manual_kb_tag-wordpress-json-error","manual_kb_tag-json-response-invalid","manual_kb_tag-wordpress-rest-api","manual_kb_tag-rest-api-response","manual_kb_tag-fix-json-error","manual_kb_tag-permalinks-settings","manual_kb_tag-https-certificate"],"_links":{"self":[{"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb\/361","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb"}],"about":[{"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/types\/manual_kb"}],"author":[{"embeddable":true,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":0,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb\/361\/revisions"}],"wp:attachment":[{"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/media?parent=361"}],"wp:term":[{"taxonomy":"manualknowledgebasecat","embeddable":true,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manualknowledgebasecat?post=361"},{"taxonomy":"manual_kb_tag","embeddable":true,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb_tag?post=361"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}