Grammar Checker API

Empower error-free writing with the most accurate grammar checker available, a fully flexible API that effortlessly integrates into native platforms with a single line of code.

It’s More Than Just Another Grammar Checker

Enhance your content creation process with the most accurate suggestions for sentence structure, word choice, overall mechanics, spelling, and more.

Combined with the award-winning AI Content Detector API and Plagiarism Detector API, it’s the only comprehensive offering dedicated to creating original, error-free writing.

Personal Proof reader

Think of It As Your
Personal Proofreader

Keep your writing concise and fresh with sentence structure tips that help prevent run-ons, fragments, and more. Plus, word choice suggestions align your vocabulary with the intended audience and identify potentially misused words and homophones. 

Write With
Absolute Confidence

Get notifications identifying potential writing mechanic errors, including spelling mistakes, comma errors, and more. Also, be alerted to conjunction errors, subject-verb disagreements, misused prepositions, and everything in between.

Grammar Error text breakdown
Fully Transparent

Be Original and
Fully Transparent 

When integrated alongside the AI Content and Plagiarism Detector, you have the only solution that fully empowers the creation of original, error-free writing and offers complete content transparency.

Coming Soon

Say More With
Multi-Language Support

While most grammar checkers only support English, the Copyleaks Grammar Checker API offers multi-language support, including German, Spanish, French, Italian, and Portuguese.

Multi Language support
Node JS

A Fully Flexible API Built By Developers for Developers

The Grammar Checker API was built with the developer in mind. It’s fully customizable and supports key programming languages, including C#, Node.JS, PHP, Java, Ruby, Python, and more.