Grammar Check, Corrector: Frex

Write with confidence—anywhere.

Frex is an AI-powered grammar checker, spell checker, summarizer and tone-aware paraphraser designed for students, professionals and content creators. Correct errors, refine style, and instantly shorten or rephrase text while preserving your unique voice.

How Frex works

Real-time analysis – Every word is scanned for grammar, spelling, punctuation and style issues.

AI suggestions – Context-aware rewrites improve clarity, formality or creativity.

One-tap apply – Accept individual fixes or improve the whole passage at once.

Key features

Grammar & Spell Check – Detect and correct mistakes in emails, essays or social posts.

Smart Summarize – Condense long paragraphs into clear bullet points or short abstracts.

Tone-Based Paraphrase – Rephrase sentences as formal, friendly, concise and more.

Vocabulary Boost – Tap to replace basic words with stronger synonyms.

Advanced Punctuation – Commas, apostrophes and colons placed exactly where they belong.

Proofreader Explanations – Brief notes show why a change was suggested, helping you learn.

40 + language support

Frex understands and improves writing in more than forty languages, including:

English, Turkish, Spanish, French, German, Portuguese, Italian, Arabic, Russian, Chinese (Simplified & Traditional), Japanese, Korean, Hindi, Bengali, Indonesian, Malay, Vietnamese, Thai, Tagalog, Polish, Dutch, Swedish, Danish, Norwegian, Finnish, Greek, Czech, Slovak, Hungarian, Romanian, Bulgarian, Croatian, Serbian, Ukrainian, Hebrew, Persian and Urdu—plus many more regional languages.

Use Frex everywhere

Academic papers, résumés and professional reports

Workplace chat, project documentation and customer emails

Social media captions, blogs and creative writing

Everyday messaging where flawless spelling matters

Go further with Frex Premium

Unlock deeper style guidance, expanded tone options, vocabulary enrichment and priority processing for large documents.

Privacy you can trust

All text is processed with strict encryption. Content is never sold or used to train unrelated models. For details, read our in-app Privacy Policy and Terms of Service.