Best Proofreading and Grammar Extensions

How we separated the picks

Every tool here corrects grammar; they differ in how deeply they edit and where they fit a workflow. We compared feature coverage, pricing boundaries, store disclosures, and the scale and recency of each public record — no hands-on scoring, only the verifiable evidence.

Best overall proofreading

Grammarly

The most proven record in the category: broad site support, mature tone controls, and the largest public user and rating base we cover.

4.5 / 535,000,000 usersFree tier; paid Pro and enterprise plans

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Best long-form editing reports

ProWritingAid

Style, structure, and readability reports that go deeper than sentence-level correction for essays and manuscripts.

4.8 / 5200,000 usersFree browser extension with paid Premium plans

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Best multilingual and open source

LanguageTool

Strong correction across dozens of languages with an open-source core and a self-hosting option.

4.7 / 52,000,000 usersFree tier; paid Premium plans

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Best if you also paraphrase

QuillBot

Grammar checking plus the strongest dedicated paraphrasing modes, one extension instead of two.

4.7 / 55,000,000 usersFree tier; paid Premium plan

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Best curated sentence rewrites

Wordtune

Sentence-by-sentence alternatives with tone control — polish rather than deep report-driven editing.

4.6 / 51,000,000 usersFree limited plan; paid Advanced and Unlimited plans

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Best lightweight shortcuts

Linguix

Covers everyday correction with snippet shortcuts, though its smaller public footprint is the caveat our review names.

4.5 / 520,000 usersFree tier with paid writing and team features

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What to check before installing

1. Match the tool to the depth you edit at: sentence polish, full-document reports, or both.
2. Check the free tier against your real weekly volume before paying — daily limits differ sharply.
3. Writing tools read what you type; review each store disclosure before using one for confidential drafts.

Sources

Rankings use current store records, feature coverage, and first-party developer documentation.

1. Chrome Web Store listing

   Store metrics, feature claims, and data categories.

2. Chrome Web Store listing

   Rating, rating count, public users, version, update date, and publisher disclosures verified August 20, 2026.

3. Chrome Web Store listing

   Rating, users, version, update date, and data categories.

4. Chrome Web Store listing

   Store facts and disclosed data handling.

5. Chrome Web Store listing

   Store metrics, update date, and privacy disclosure.

6. Chrome Web Store listing

   Rating, rating count, public users, version, update date, and publisher disclosures verified August 20, 2026.