Gmail extension · Free

Prove your emails, too.

Not prompted, not pasted — written. Proofwriter already verifies documents; this brings the same idea to everyday email, free, for every account.

How to connect your account

One code, and you're set.

1

Install the extension

Click "Add to Chrome" above.

2

Click Connect

Click the extension’s icon in your toolbar, then "Connect." A new tab opens on proofwriter.app — sign in there if you’re not already.

3

Copy the one-time code

That page shows a short code, generated just for you. Copy it — the tab closes the extension’s popup when it opens, and that’s expected.

4

Paste it back in

Click the extension icon again and paste the code into the popup. That’s the whole connection — you’re done.

How it works

Nothing to think about.

Write

Compose like normal

The extension quietly watches your compose window — no setup, no extra window, no change to how you write email.

Flag

Pasted text gets flagged

The same paste-detection Proofwriter uses in its editor runs on Gmail’s compose box, so a pasted paragraph is recorded, not hidden.

Verify

A verified link lands in your signature

Once you send, the link resolves to a public page showing word count, time spent, and whether anything was pasted — never the email itself.

It's not for AI-assisted content teams chasing volume.

It's for the writer who wants proof, not a promise, behind every byline, submission, and now every email — free, unlimited, no catch. The extension never stores what you write; only the process, and only for the specific message someone clicks through to.

Prove you wrote it. Not prompted, not pasted — written.

Free with any Proofwriter account — the extension works with your existing sign-up.