AI-powered grammar check and spelling correction suite

We’ve built WProofreader – a portfolio of multilingual sentence check and AI text rewrite solutions for dev companies, businesses, and individuals.

Easily integrate WProofreader pre-built components with web apps, HTML controls and WYSIWYG editors: CKEditor, Froala Editor, TinyMCE, Quill, etc. Get access to the WProofreader engine via grammar check API.

Install as a browser extension for Chrome, Firefox, and Microsoft Edge and host it on cloud or on-premise. Use within Drupal and WordPress CMSs.

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Multilingual sentence corrector

Proofread spelling and grammar, improve your writing style in 20+ languages. Enjoy spelling autocorrect and autocomplete suggestions.

AI paraphrasing tool

Try WProofreader AI writing assistant 🪄 Play with the size and style of your texts, summarize key ideas and proofread.



Data in transit is encrypted with TLS protocol. GDPR-compliant. On-premise deployment is for security-conscious businesses.

We love when our clients enjoy our products. So we take every client’s need as our own.


We respond within a business day to all sales and tech requests and provide guided installation in case it’s needed.

Our products

Varying in proofreading techniques all of our products have the same powerful WProofreader engine at hearts. Find the perfect match for your application’s workflow.


WProofreader SDK

A combo of ready-made plugins for HTML editors and a standalone API helping development teams enrich web apps and custom systems with sentence checking and paraphrasing functionality.


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WProofreader browser extension

A secure writing assistant for individuals and teams. Available for Chrome, Firefox & MS Edge. Proofread emails, docs, messages and refine your style online.

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Icon of SpellCheckAsYouType (SCAYT) plugin for CKEditor 4. Integrated instant spell and grammar checking in CKEditor 4.

SCAYT plugin for CKEditor 4

Out-of-the-box multilingual grammar and spell checker plugin for CKEditor 4. It instantly detects and underlines writing issues in as-you-type mode.

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Icon of WProofreader Plugin for WordPress. It checks spelling and grammar in websites, built with WordPress 4, and the new WordPress 5.

WProofreader for WordPress

Ever wished to have another pair of eyes to look at your text before posting? WProofreader text corrector plugin for WordPress is at your service.

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HTML controls

  • WebSpellChecker products can be integrated and used with such HTML editable controls as div, iframe, textarea, input.

WYSIWYG editors

  • CKEditor 4 logo
  • Logo of TinyMCE 4 WYSIWYG editor
  • Logo of Froala Editor WYSIWYG HTML editor
  • CKEditor 5 logo
  • Logo of Kendo UI rich text editor
  • Logo of WYSIWYG editor
  • Logo of ProseMirror WYSIWYG editor
  • Logo of Quill WYSIWYG editor
  • Logo of Trix WYSIWYG editor

Other integrations

Web browsers

  • Logo of Chrome browser
  • Logo of Firefox
  • Logo of Microsoft Edge

Deployment options


Enterprise-class sentence checker integrated in your infrastructure and hosted on your company servers. Ideal for security-conscious companies.

  • Bespoke terms

    Licensing and pricing are tailored for your custom infrastructure and processing needs.

  • On-demand features

    Our tech team will fine-tune the proofreading engine to meet your specific requirements.

  • Ultimate control

    All data is stored and processed on your servers. Risks of data leakage are eliminated.

  • Flexible deployment

    Seamlessly integrate the proofreading engine into your infrastructure environment.

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Your proofreading capabilities are hosted on AWS with data centers in the US East region. Perfect for startups and small companies with flexible scaling needs.

  • Quick start

    Get your proofreading engine up and running in a matter of time with detailed installation guides and responsive support team.

  • Automatic upgrades

    We provide continuous product upgrades with backward compatibility available in your spelling and grammar check engine.

  • No infrastructure fuss

    Enjoy the extended functionality of your solution while we take care of the rest.

Try it free

Our resellers

Purchase WebSpellChecker proofreading solutions via our trusted software procurement partners.

Your customers need an online correction grammar and spelling solution? Contact us and learn more about our reseller program.