AI-powered grammar, punctuation & spell check suite

Tailored proofreading and sentence style check solutions for your business in different languages.

Can be easily integrated within a website or web app in almost any type of the HTML editable elements to modern rich text editors such as CKEditor, Froala Editor, TinyMCE, Quill and many others.

Also available in browser extension, secure and robust as a writing assistant for individual and business users.

Try it free
Have spell- and grammar checking up and running in your app in under 30 minutes.

Easy integration

Have spell and grammar checking up and running in your app in under 30 minutes.

Get truly global with 16 languages covered by default and 152 additionally available.

80+ languages

Go global with 80+ languages. Juggle 2+ languages easily when typing with the auto-detection feature.

The language changes every minute. We make sure to keep your spelling up-to-date with regular dictionary updates.

Evergreen dictionaries

Tired of Reddit being replaced with redish? Calm down, our evergreen dictionaries consist of buzzwords and modern terms to make you sound relevant.

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

Caring support

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

Our products

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


WProofreader SDK

The multilingual spelling and grammar check tool for your web app. Integrate it in modern WYSIWYG editors out there: CKEditor, Froala, TinyMCE, Quill.

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WProofreader browser extension

A secure writing assistant for companies and teams. Available for Chrome, Firefox & MS Edge. Сompatible with any online business tool or software. 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

The out of the box spelling and grammar checking plugin for CKEditor 4. It instantly underlines spelling and grammar mistakes, while the user is typing. Provide correction suggestions for marked words on right mouse click.

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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 for a second pair of eyes on your text before posting? Enable instant proofreading in the post editor for polished content on your WordPress resources.

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HTML controls

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

Rich text 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 spell and grammar checking engine hosted in your infrastructure.

  • Bespoke terms

    Have licensing and pricing specifically tailored for your infrastructure and processing needs.

  • On-demand features

    Have our tech team fine-tune the proofreading to your company’s unique needs.

  • Ultimate control

    Not a word is leaving your own servers.

  • Flexible deployment

    Seamlessly integrate the proofreading engine into your data infrastructure.

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Deployment environments

The Standalone version of the WebSpellChecker application can be configured and run on one of the following environments which can help you to reliably use our products.

Cloud Platforms

  • Amazon Web Services
  • Google Cloud Platform
  • Microsoft Azure

Operation Systems

  • Linux
  • Ubuntu Server with LTS 12.04+
  • CentOS 6.0+, Red Hat Enterprise Linux 6.0+
  • Windows
  • Windows Server 2008+

Web/Application servers

  • Internet Information Services (IIS)* 7.0+
  • Apache HTTP Server 2.2+
  • Apache Tomcat 7.0+
  • Oracle WebLogic Server 11g (10.3.6), 12c (12.2.1+)
  • GlassFish Server 4.0+


Perfect for startups, small companies, and projects with flexible scaling needs.

  • Quick start

    Setting spell and grammar checking in your application is as fast and easy as copy and paste.

  • Automatic upgrades

    The latest version of the spell and grammar checker is instantly available in your application with every update.

  • No infrastructure fuss

    Enjoy our solution functionality while we take care of all the maintenance.

Try it free

Our resellers

All of our products can be also purchased via our trusted software procurement partners.

Feel like your customers need spell- and grammar checking solutions? Contact us for information about our reseller program.