Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Does it work offline?

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Home / Text & Data / Spell & Grammar Checker

Spell & Grammar Checker

Check spelling and common grammar slips in text, DOCX or PDF, with one-click fixes.

Free, no uploads, no sign-up. Runs 100% in your browser.

How Spell & Grammar Checker works

Spelling uses nspell with the open Hunspell English dictionary, loaded once. Grammar and style checks are simple rules for repeated words, a or an, capitals, common mix-ups and wordy phrases.

Input: TXT, DOCX, PDF, HTML, MD.

How to use Spell & Grammar Checker

Open Spell & Grammar Checker and paste your text.
Choose an operation or option.
Review the live result.
Copy it or download it.

Tips

Text never leaves your device, so it is safe for drafts and private notes.

Spell & Grammar Checker FAQ

Are my files uploaded?: No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
Is it free? Are there limits or watermarks?: Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
Does it work offline?: Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

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