For developers by tech experts
Integrate pre-built JavaScript libraries for WYSIWYG editors or deploy a standalone spell and grammar check API to season your apps and systems with proofreading & rewording functionality—and go!
For any developer expertise. Tech support from our side is guaranteed.
Demo text size is limited to 2000 characters.
Why WProofreader?
Backed by AI, but made with a human touch. Shipped as a plug-and-play, integrated effortlessly. Can be deployed in the cloud and on-premises.
Deployment
Cloud and self-hosted deployment options available. AMD and ARM architectures support. Reasonable hardware requirements: CPU-based instances.
Compatibility
Opt for a customizable and powerful point of integration with different lightweight web-based systems, classic editable elements within your own stack. Reasonable development efforts are needed with guaranteed tech support.
Admin panel
A handy admin panel for the proofreading functionality management, incl. subscription, analytics, custom dictionaries and rules, and team users. Available for cloud clients, on-prem support is on the way.
Customization
Flexible and customizable UI of JavaScript component. Tweak WProofreader effortlessly to meet your organization needs: choose the primary language, set UI localization, disable tabs in settings, extend user dictionaries, personalize the look with “gray”, “dark” and “custom” themes.
Accessibility compliance
We regularly self-run accessibility testing and update our VPAT reports to make sure the solution is still convenient for all types of users. WProofreader meets the majority of success criteria at Level A and AA of WCAG 2.1. The cool thing about it is keyboard navigation, which makes all the actions with the software available for users with different abilities.
Customer support
We'll get back to you on any sales or tech requests within a business day. And if you need help setting WProofreader up, we'll happily walk you through it.
Updates and patch management
We keep WProofreader text checker at its best with regular product updates packed with cool new features. Our hassle-free patch management squashes bugs before they bug you.
Environments & integrations
Classic content-editable elements, popular RTEs, powerful CMSs—WProofreader is a perfect match for any tool from your kit
Don’t see your fav tool in the list? No worries, just let us know and we’ll check it out if WProofreader is compatible with your choice.
What’s inside WProofreader SDK?
Integrate pre-built JavaScript libraries into HTML elements, WYSIWYG editors, CMS or use an off-the-shelf extension to season your apps and systems with proofreading & rewording functionality. Build and go!
RTEs and HTML editable controls
The component integrates in HTML editable controls and rich text editors within web applications. The solution is designed to scale websites or apps up with multilingual sentence checking and paraphrasing functionality.
CKEditor 5 plugin
The multilingual CKEditor 5 spell and grammar check plugin. It provides both instant and in-dialog proofreading modes in a convenient UI.
TinyMCE plugin
The TinyMCE spell check plugin adopts the full functionality of the WProofreader component, with minor adjustments to the editor's appearance and features.
Standalone API
Standalone WProofreader API empowers developers to tweak, twist, extract, manipulate and further integrate proofreading capabilities into custom systems and infrastructures.
SCAYT plugin for CKEditor 4
Out-of-the-box multilingual grammar and spell checker plugin for CKEditor 4 instantly detects and underlines writing issues in as-you-type mode.
Pricing
Choose a plan that better fits the technical needs of your team or project, e.g. word processing volume, priority support, security requirements, etc. If you need more words or have questions regarding plans, contact sales.
Free
For projects with small data processing needs.
Basic spelling, grammar, style with daily word limit
Basic spelling, grammar, style with daily word limit
Multiple languages support
User-level custom dictionary
Text operations within AI writing assistant (daily limit)
WProofreader branding
Free
For projects with small data processing needs.
Basic spelling, grammar, style with daily word limit
Basic spelling, grammar, style with daily word limit
Multiple languages support
User-level custom dictionary
Text operations within AI writing assistant (daily limit)
WProofreader branding
Public product documentation
Starter
For basic proofreading needs with a limited word count.
Up to 16.7 million words processed
Up to 200 million words processed
Multilingual text check
Autocorrect and autocomplete suggestions
Custom dictionaries
Style guide builder
Starter
For basic proofreading needs with a limited word count.
Up to 16.7 million words processed
Up to 200 million words processed
Multilingual text check
Autocorrect and autocomplete suggestions
Custom dictionaries
Style guide builder
Professional
For typical proofreading needs, covering a standard word usage.
Up to 41.7 million words processed
Up to 500 million words processed
Everything in Starter plan
Professional
For typical proofreading needs, covering a standard word usage.
Up to 41.7 million words processed
Up to 500 million words processed
Everything in Starter plan
Advanced
For extended proofreading needs with a high word usage volume.
Up to 83.3 million words processed
Starting from up to 1 billion words processed
Everything in Professional plan
Priority email support
Advanced
For extended proofreading needs with a high word usage volume.
Up to 83.3 million words processed
Starting from up to 1 billion words processed
Everything in Professional plan
Priority email support
Frequently asked questions
Can I try WProofreader SDK for free?
Yes. We offer a 14-days evaluation period for the cloud version and 30-day—for the on-premises version of WProofreader SDK. WProofreader browser extension is available absolutely for free, the Business version comes under the premium subscription.
What’s the difference between the cloud and standalone versions?
The cloud version is the easiest way to start. We host everything for you on AWS servers in the US East region, so you don’t need to manage any infrastructure. You simply integrate the frontend while we handle the backend.
The on-premises solution provides full control and keeps all data within your own infrastructure, making it ideal for organizations with strict security or compliance needs. This option supports various operating systems, including Windows Server and multiple Linux distributions, and is compatible with virtualization and containerization technologies. Each release undergoes extensive testing to ensure smooth deployment and optimal performance across diverse environments, including compatibility with web servers like NGINX and Apache, and proper JVM configuration.
Both options prioritize security with regular updates and thorough testing to ensure smooth operation. While the cloud uses powerful GPUs for AI tasks, the on-premises solution is optimized for efficient performance on standard CPU hardware.
What’s the difference between WProofreader SDK and WProofreader browser extension?
WProofreader SDK is designed for developers and teams who want to build proofreading directly into their web apps, editors, or custom workflows. It works well with popular WYSIWYG editors like CKEditor or TinyMCE, or as a standalone API. You can choose cloud hosting or deploy it on your own servers for extra control.
WProofreader browser extension is better suited for individual users or teams who need an out-of-the-box spelling and grammar check in their browsers. It works anywhere you write online—emails, CRMs, or web forms. Use it for free through our cloud or switch to the Business plan to host it on your own servers.
What happens if you exceed the limits of your usage plan?
If you go over your word limit, the service will pause until you add more capacity. Don’t worry—our team keeps an eye on your usage and will notify you in advance if you’re getting close. This way you’ll have time to upgrade or buy extra words.
We’ll help you pick the best option based on how much your team actually uses. We also offer discounts for high-volume needs, so if you expect big spikes, just let us know, and we’ll work out the best plan for you.
Can’t find the answer you’re looking for? Please chat to our team.
Need a tool for yourself?
The WProofreader browser extension corrects spelling and grammar in your messages, docs, and emails. Available for Chrome, Firefox and Microsoft Edge.
