All Checkers
Check, count and improve your writing. Free to start, no signup.
AI & originality
AI Detection Checker
Paste text for a hedged AI-confidence score, per sentence.
OpenPlagiarism Checker
Score how similar your text is to existing sources.
OpenSummary Checker
Check a summary faithfully represents its source text.
OpenAI Humaniser
Rewrite AI drafts to read more naturally in a chosen tone.
OpenWriting
Grammar Checker
Catch grammar, spelling and clarity issues with suggested fixes.
OpenParaphrase Checker
Rewrite text in a clearer, original phrasing across modes.
OpenSummariser
Condense long text into key sentences or a short paragraph.
OpenGuideline Checker
Check text against a style guide, rubric or brand rules.
OpenCitations
Format APA, MLA or Chicago citations from source details.
OpenUtilities
Browser extension
Every tool, in your browser
Run any of these on text you select on any page. Same checkers, same reports. Get the extension →
