Freemius

Cary Molyneux

Spellmatic scans your entire WordPress site for spelling and grammar errors, then lets you fix them in one click — including content built with Elementor, Avada, Divi, WPBakery, and more.
Most grammar tools only check what you’re currently editing. Spellmatic scans every post, page, product, and comment on your site — even content stored inside page builder data structures.
<h4>Features</h4>
<ul>
<li>Full-site scan across all posts and pages — no error cap</li>
<li>Privacy-first local grammar engine powered by Harper WASM — no data ever leaves your server</li>
<li>All errors shown per scan with fix / dismiss actions</li>
<li>Error dashboard with error type badges and in-context display</li>
<li>Custom dictionary — add words to ignore globally</li>
<li>Scheduled email digests with scan summaries</li>
<li>BYOK AI integration with OpenAI — contextual AI proofreading using your own API key</li>
</ul>
<h4>Premium Features</h4>
Premium plans add powerful extras for professionals and agencies. Available at <a href="https://spellmatic.com" rel="nofollow ugc">spellmatic.com</a>.
<ul>
<li>Bulk auto-fix — fix all errors across your site in one click</li>
<li>Smart fix — AI-powered contextual corrections</li>
<li>Additional AI providers — Claude, Gemini, Grok, and OpenRouter</li>
<li>Priority support</li>
</ul>
Pro ($79/year) 
* All premium features 
* Dedicated account management
Agency ($149/year) 
* Everything in Pro 
* Up to 10 WordPress sites / multisite network support
<h4>Page Builder Compatibility</h4>
Spellmatic scans content inside: 
* Elementor — reads JSON widget data (<code>_elementor_data</code>) 
* Avada / Fusion Builder — parses Fusion shortcodes and page options 
* Divi Builder — strips and scans Divi shortcode content 
* WPBakery Page Builder — scans all WPBakery shortcode text 
* Beaver Builder — reads serialized layout data 
* Bricks Builder — parses JSON element data 
* Oxygen Builder — reads builder meta 
* Brizy — reads JSON layout data 
* Gutenberg / Block Editor — native support 
* Kadence Blocks — native block support
<h4>Privacy First</h4>
The free tier uses Harper WASM — a blazing-fast, privacy-respecting grammar engine that runs entirely in your browser (client-side WebAssembly). Zero external API calls. Zero data sent anywhere. Your content stays yours.
The optional BYOK AI layer uses your own API key. Your key is stored encrypted on your server and all API calls go directly from your server to your chosen AI provider — Spellmatic never sees your content or your key.
<h3>External Services</h3>
This plugin connects to the following third-party services. Full details are also available on the Open Source & Services page inside the plugin (Spellmatic → Open Source).
<h4>Grammar Engine — Harper (Bundled)</h4>
The Harper grammar engine (Apache 2.0 licensed) is bundled with the plugin and runs entirely in your browser. No external connections are made during scanning.
You may optionally update the grammar engine to get improved dictionaries and grammar rules. No external connections are made by the plugin for grammar engine updates — all updates are performed manually by the site administrator:
<ol>
<li>Download the latest <code>harper.js</code> from the Harper npm package at <a href="https://www.npmjs.com/package/harper.js" rel="nofollow ugc">https://www.npmjs.com/package/harper.js</a> — the file is located in the <code>dist/</code> folder of the package.</li>
<li>Upload the file to <code>wp-content/uploads/spellmatic/harper.js</code> on your server (create the <code>spellmatic</code> folder if it does not exist).</li>
<li>The plugin will automatically detect and use the uploaded file on the next page load.</li>
<li>To revert, simply delete the file from <code>wp-content/uploads/spellmatic/</code> — the plugin will fall back to the bundled version.</li>
</ol>
<ul>
<li>Harper project: <a href="https://github.com/Automattic/harper" rel="nofollow ugc">https://github.com/Automattic/harper</a></li>
<li>Harper license: <a href="https://github.com/Automattic/harper/blob/master/LICENSE" rel="nofollow ugc">Apache License 2.0</a></li>
<li>Harper website: <a href="https://writewithharper.com" rel="nofollow ugc">https://writewithharper.com</a></li>
</ul>
<h4>AI-Powered Grammar Analysis (Optional, BYOK)</h4>
When you enable the BYOK AI feature and initiate an AI scan, post and page text is sent to your chosen AI provider for contextual grammar analysis. This only occurs when you explicitly click “Scan” with AI enabled. API keys are encrypted with AES-256-CBC and stored on your server.
OpenAI 
* Service: <a href="https://openai.com" rel="nofollow ugc">https://openai.com</a> 
* Terms of Use: <a href="https://openai.com/policies/terms-of-use" rel="nofollow ugc">https://openai.com/policies/terms-of-use</a> 
* Privacy Policy: <a href="https://openai.com/policies/privacy-policy" rel="nofollow ugc">https://openai.com/policies/privacy-policy</a>
Anthropic (Claude) 
* Service: <a href="https://www.anthropic.com" rel="nofollow ugc">https://www.anthropic.com</a> 
* Terms of Use: <a href="https://www.anthropic.com/legal/consumer-terms" rel="nofollow ugc">https://www.anthropic.com/legal/consumer-terms</a> 
* Privacy Policy: <a href="https://www.anthropic.com/legal/privacy" rel="nofollow ugc">https://www.anthropic.com/legal/privacy</a>
Google (Gemini) 
* Service: <a href="https://ai.google.dev" rel="nofollow ugc">https://ai.google.dev</a> 
* Terms of Use: <a href="https://ai.google.dev/gemini-api/terms" rel="nofollow ugc">https://ai.google.dev/gemini-api/terms</a> 
* Privacy Policy: <a href="https://policies.google.com/privacy" rel="nofollow ugc">https://policies.google.com/privacy</a>
xAI (Grok) 
* Service: <a href="https://x.ai" rel="nofollow ugc">https://x.ai</a> 
* Terms of Use: <a href="https://x.ai/legal/terms-of-service" rel="nofollow ugc">https://x.ai/legal/terms-of-service</a> 
* Privacy Policy: <a href="https://x.ai/legal/privacy-policy" rel="nofollow ugc">https://x.ai/legal/privacy-policy</a>
OpenRouter 
* Service: <a href="https://openrouter.ai" rel="nofollow ugc">https://openrouter.ai</a> 
* Terms of Use: <a href="https://openrouter.ai/terms" rel="nofollow ugc">https://openrouter.ai/terms</a> 
* Privacy Policy: <a href="https://openrouter.ai/privacy" rel="nofollow ugc">https://openrouter.ai/privacy</a>
<h4>Licensing & Analytics — Freemius</h4>
Spellmatic uses the Freemius SDK for license validation, plan management, and optional opt-in usage analytics. You are asked for consent during plugin activation.
<ul>
<li>Service: <a href="https://freemius.com" rel="nofollow ugc">https://freemius.com</a></li>
<li>Terms of Use: <a href="https://freemius.com/terms/" rel="nofollow ugc">https://freemius.com/terms/</a></li>
<li>Privacy Policy: <a href="https://freemius.com/privacy/" rel="nofollow ugc">https://freemius.com/privacy/</a></li>
</ul>
<h4>Perfect For</h4>
<ul>
<li>Agencies managing multiple client WordPress sites</li>
<li>Bloggers with large back-catalogues who want to clean up old posts</li>
<li>WooCommerce stores where typos hurt credibility and conversions</li>
<li>Content publishers who need a quick pre-launch proofread</li>
</ul>

Spellmatic

Scan and fix spelling and grammar errors across your entire WordPress site in one click — including Elementor, Avada, Divi, and WPBakery content.

WebSpellChecker

WProofreader plugin for WordPress scans and checks your website content for spelling, grammar, punctuation and style issues. No banner ads on your website!
Compatible with the latest WordPress versions.
WProofreader Free is ideal for a small personal blog or lightweight use:
Add instant spell checking to your WordPress site with support for 20+ languages. The free version comes with a daily word limit and applies to a single website, with a per-browser personal dictionary for storing custom words. Basic spelling and grammar check. No cloud sync. A straightforward, no-cost tool for basic proofreading needs.
WProofreader Pro for professional sites and teams:
A full-featured writing assistant for WordPress with unlimited websites, and no daily limits. Includes spell and grammar checking in dozens of languages, AI-powered text rephrasing and proofreading, text autocomplete, and a cloud-synced personal dictionary accessible from any device or browser. Subscription owners can also set up organization-wide custom dictionaries shared across all connected sites for keeping terminology consistent everywhere.
Check more differences between the WProofreader plugin free and Pro versions on the <a href="https://wproofreader.com/integrations/wordpress" rel="nofollow ugc">website</a>.
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/mhrZN87jydA?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
<h3>User functionality</h3>
Proofreading modes
<ul>
<li>The check-as-you-type mode instantaneously detects writing mistakes and provides suggestions on-hover.</li>
<li>The proofread-in-dialog mode aggregates all the issues detected and suggestions provided.</li>
</ul>
Customizable dictionaries
The Pro version includes:
<ul>
<li>User-level custom dictionary allows end users to create personal dictionaries with specific words and terms (complex words, acronyms, proper names, etc.) and use them while working with WordPress. Once a word is added to a personal dictionary, it will not be considered as a misspelling, and will appear in the suggestions list. All words you add are stored either in the browser local storage or on our cloud and are accessible from the browser.</li>
<li>Organization-level custom dictionary allows creating dictionaries that extend the vocabulary of the standard dictionary with custom words specific to your organization culture, industry, domain, etc. All the words added to a dictionary by the admin will be available to all users within your organization. This type of dictionary is available only under the Pro version.</li>
<li>Specialized medical spelling dictionaries for English, German, French and Spanish, and legal dictionaries for English. Available for both, Free and Pro versions of the plugin.</li>
</ul>
Feature-rich
<ul>
<li>Multi-language support</li>
<li>Spelling autocorrect functionality for instant correction of common typos</li>
<li>Text autocomplete suggestions functionality for faster writing</li>
<li>Style check functionality with pre-defined non-inclusive and profanity language check for professional writing</li>
<li>Style guide builder for creating language rules</li>
<li>User-level and organization-level dictionaries</li>
</ul>
User-friendly and up-to-date
<ul>
<li>Straightforward plugin configuration (<a href="https://youtu.be/mhrZN87jydA" rel="nofollow ugc">check the video tutorial</a>)</li>
<li>Visible and intuitive text check with different colors used for spelling, grammar, and style guide issues</li>
<li>Easily toggle on/off the plugin button</li>
<li>Support the latest version of WordPress</li>
<li>Seamlessly integrates with the WordPress editor (Gutenberg) and compatible with the classic editor. Supported browsers: Chrome, Firefox, Safari, Microsoft Edge.</li>
<li>Content elements supported: pages, posts, tag descriptions, category descriptions, WooCommerce, WP eCommerce product descriptions, any custom post types, meta description fields of Yoast SEO plugin, all fields in the Admin panel and user-facing editable fields (disabled by default).</li>
</ul>
<h3>Benefits of WProofreader plugin for WordPress</h3>
<ul>
<li>It saves time proofreading in any of the two modes, check-as-you type and proofread-in-dialog.</li>
<li>You can create and maintain quality posts in different languages without being worried about possible mistakes.</li>
<li>Advanced functionality for spelling autocorrect, autocomplete suggestions and style guide for faster and more productive writing.</li>
</ul>

WProofreader spell & grammar check plugin for WordPress

WProofreader checks spelling, grammar, and style in real-time while editing in WordPress.

Spellmatic vs WProofreader spell & grammar check plugin for WordPress