01 · On-device
Local grammar checks
Catch English spelling and grammar mistakes as you type. Inline Fix checks on your device, without uploading your writing. Choose which corrections to apply.
Free Chrome writing assistant
Catch mistakes privately. Rewrite right where you type.
Check English spelling and grammar on your device in supported fields. When you want different wording, choose an AI rewrite. Your text is sent for AI processing only when you submit it.
Add RewritePal to Chrome
Free to install
Pause any website anytime
- English checks on your device
- Corrections you control
- AI only after you click
- Popup when an editor is unsupported
- Up to 10×
- faster grammar checks and AI rewrites
- Up to 75%
- less RAM
Benchmarked against Grammarly and QuillBot (November 2026). Results vary by device, text, and connection.
Email draft
Toalex@northwind.co
SubjectFollow-up on yesterday's numbers
Hi Alex,
Thanks for the recap. I wanted to quickly circle back on the timeline so we are aligned before Friday.
RewritePal
RewriteFix grammarShorten
Result · Professional
I wanted to confirm the timeline so we stay aligned before Friday.
ReplaceCopy
Local checks. Optional AI. One extension.
Make the small fix. Rewrite the selected line. Or open the popup for a full draft.
Catch the everyday mistake without uploading your writing. Ask AI for a different tone, clearer wording, or a shorter draft when you need it. Keep each tool under your control.
02 · AI when you choose
Selection Rewrite
Select two or more words in a supported field. Choose an AI Rewrite, Fix grammar, or Shorten action to submit that text. Review the result before replacing or copying it.
03 · Toolbar
Popup rewriter
Tone, role, language, and history in the toolbar. Use this when a website editor is not supported, including Google Docs.
How it works
Check as you type. Rewrite when you choose.
Enable website tools when you want RewritePal beside the fields where you already write. The popup stays in the toolbar for everything else.
- 1
Add the extension
Install RewritePal from the Chrome Web Store and pin it for quick access.
- 2
Enable website tools
Approve website access once, then choose Selection Rewrite, Inline Fix, or both.
- 3
Make a local fix
Type in a supported field, open an underline, and choose a correction. Local checks keep that text on your device.
- 4
Choose an AI rewrite
Highlight two or more words. Selecting text does not send it. Submit with Rewrite, Fix grammar, or Shorten, then review before replacing.
Your data
A writing assistant that waits until you ask
Inline Fix checks your writing on your device with Harper. AI actions, including Fix grammar and Shorten in the rewrite card, send only the text you submit for processing.
Stays on your device
- Inline Fix text
- Text you have not submitted
- A selection you have not acted on
Sent only after you click
- Selection Rewrite after Rewrite, Fix grammar, or Shorten
- Popup text after Rewrite Text or Explain changes
- Account and quota, if you are signed in
Made for the open web
Keep your writing assistant where the writing happens
Improve the short messages and everyday fields that are too small for a separate document editor. Selection Rewrite and Inline Fix do not support Google Docs yet. Use the popup there.
Email repliesSupport messagesOnline formsSocial postsAI promptsWeb editors
FAQ
Before you add RewritePal to Chrome
The short version: local checks are private, AI rewrites are explicit, and you control each website tool separately.
What does the RewritePal Chrome extension do?
RewritePal checks English spelling and grammar on your device with Inline Fix and offers AI Selection Rewrite in supported writing fields. Review every correction or rewrite before applying it. The popup remains available for focused rewrites and unsupported editors.
Are Inline Fix grammar checks private?
Yes. Inline Fix checks the focused eligible field locally in the extension with Harper. That text is not sent to the RewritePal API. AI rewrites are separate and send only the text you explicitly submit for rewriting.
What powers the local grammar checks?
Inline Fix uses Harper, an open-source grammar engine built in Rust. English checks run on your device without a cloud round trip. AI rewrites are separate and process the text you submit online.
How does RewritePal compare with Grammarly and QuillBot?
Up to 10× faster grammar checks and AI rewrites. Up to 75% less RAM. Benchmarked against Grammarly and QuillBot (November 2026). Results vary by device, text, and connection.
Does RewritePal work on every website?
Selection Rewrite and Inline Fix work in standard textareas, supported text inputs, and standards-based rich-text editors on ordinary websites after you enable website access. Some specialized editors, embedded frames, and Google Docs are not supported yet. The popup remains available as a fallback.
Can I turn RewritePal off on specific websites?
Yes. Enable website tools once, then use Pause here for any site where you do not want them to run. Selection Rewrite and Inline Fix also have independent switches, and you can remove website access everywhere.
Is the RewritePal Chrome extension free?
You can install RewritePal for free. Local Inline Fix corrections do not use AI actions. AI rewrites use the daily allowance shown in the extension, and a free account unlocks the higher free allowance.
Does Inline Fix support languages other than English?
Inline Fix currently checks supported English text only and skips text that Harper does not identify as likely English. The separate AI rewrite workflow supports the output languages available in RewritePal.
Write where you already work
Private corrections. Your voice. Less waiting.
Catch English mistakes locally and rewrite selected text when you want to. You choose each correction and decide when to send text for AI processing.
Opens the official Chrome Web Store listing.