Does this work outside the browser?

Yes. Because corrections run on whatever is on your clipboard, the Rewrite transform works in any Mac app — Mail, Slack, Notes, Xcode, and more — not just inside a browser.

Is there a monthly fee for the grammar feature?

No. ClipHistory is a one-time $19.99 purchase with a 12-month license and no auto-renewal. AI transforms use your own API key, billed by your chosen provider.

Which AI provider should I use for grammar?

You can use Anthropic, OpenAI, DeepSeek, Google, or a custom endpoint. Larger models tend to give better phrasing; smaller models are cheaper and fine for quick typo fixes.

Will my text be stored in the cloud?

No. ClipHistory has no cloud and no account. Only the text you actively send through a transform leaves your Mac, going directly to your AI provider under your own key.

An AI Grammar Fixer Built Into Your Mac Clipboard

Most grammar tools want to live inside one app, or as a browser extension that watches everything you type. That's fine until you're writing in Slack, a code comment, a Terminal commit message, or a native Mac app the extension doesn't reach. A clipboard-based approach works everywhere, because everything goes through the clipboard eventually.

Here's how to fix grammar and tighten writing on any Mac app using a local clipboard manager with AI transforms.

How it works

ClipHistory stores your recent clips and lets you run AI transforms on any of them. To fix grammar:

Select and copy the text you wrote.
Press Cmd+Shift+V to open ClipHistory.
Pick the clip and run the Rewrite transform.
Paste the corrected version back over your original.

The Rewrite transform cleans up grammar, fixes awkward phrasing, and tightens wordy sentences. Because it operates on the clipboard, it works the same in Mail, Notes, Slack, Xcode, or any other app — no per-app integration required.

Why a clipboard tool reaches everywhere

A browser extension only sees the browser. An in-app assistant only helps inside its app. The clipboard is the one surface shared by every program on macOS. Copy from anywhere, transform, paste back anywhere. That universality is the whole point: you learn one shortcut and it applies across your entire system.

You pick the model behind the fixer

Grammar correction quality comes from the AI model. ClipHistory connects to five provider options — Anthropic, OpenAI, DeepSeek, Google, or a custom endpoint — and you use your own API key. Practical upshots:

Cost control. You pay the provider's per-token rate directly. Light grammar fixes on short text cost fractions of a cent.
Model choice. Prefer one provider's tone? Use it. Want a cheaper model for quick fixes and a stronger one for important writing? Switch between them.
No middleman. There's no ClipHistory subscription tier gating "AI features." The transform is built in; you supply the key.

Rewrite vs. clean

Two transforms cover most writing cleanup:

Rewrite — fixes grammar, improves clarity, smooths phrasing. Use this on text you wrote.
Clean — strips formatting artifacts (stray line breaks, weird spacing, leftover bullets). Use this on text you pasted in from a PDF or web page before doing anything else with it.

For your own drafts, Rewrite is the grammar fixer. For imported text, Clean first, then Rewrite if you also want to polish it.

Keep your go-to corrections as snippets

If you reuse the same polished phrases — a sign-off, a disclaimer, a standard explanation — save them as snippets. Snippets are reusable text blocks you can paste instantly without re-running an AI transform every time. Fix it once, save it, reuse it forever. That's faster and costs nothing per use.

What stays on your Mac

ClipHistory has no cloud and no account. Your clip history, snippets, and boards live locally. The only data that leaves your machine is the specific text you choose to send through an AI transform, sent directly to your chosen provider under your key. You decide, clip by clip, what gets sent.

For writing that's confidential — internal docs, unreleased copy — that control is the difference between "convenient" and "usable at work."

Where a clipboard grammar fixer fits your day

A few places this shows up constantly:

Chat messages. Slack and Teams have no real grammar checker. Copy your message, Rewrite, paste it back before you hit send.
Commit messages and code comments. Tools like Xcode and Terminal are outside any browser extension's reach. The clipboard isn't.
Forms and text fields. Web forms, CMS editors, and admin panels rarely check grammar. Copy, fix, paste.
Quick replies. Anywhere you'd dash off a sentence and wish you'd reread it.

The common thread: the clipboard reaches all of these, so one shortcut covers your whole system instead of one app at a time.

Clean for imported text, Rewrite for your own

It's worth repeating because it changes the quality of the result: text you paste in (from a PDF, a web page, a log) should get a Clean pass first to strip broken line breaks and stray characters, then Rewrite if you also want to polish it. Text you wrote yourself goes straight to Rewrite. Using the right transform for the source saves you from fixing artifacts the model would otherwise try to preserve.

A realistic expectation

An AI grammar fixer is excellent at catching typos, agreement errors, and clunky sentences, and at making text read more smoothly. It is not a substitute for a careful read on high-stakes writing. Treat the corrected output as a strong draft: skim it, confirm it kept your meaning, then send.

Summary

You don't need a dedicated grammar app or a browser extension to fix writing on a Mac. Copy your text, hit Cmd+Shift+V, run Rewrite, and paste it back — anywhere on your system, with the model you choose, your key, and your text staying local except for the single transform you send.

Ready to put AI to work on your clipboard? Get ClipHistory for macOS — $19.99 (one-time payment, 12-month license, no auto-renewal). Signed and notarized by Apple, runs on Apple Silicon and Intel, macOS 12+.