Human proof for modern text

Stamp your words with a human receipt.

SignedByAHuman creates a public receipt for text you choose to share. It proves a human took responsibility, not that they wrote every word.

Content to sign

This creates a public receipt that includes the full text. Do not paste private or confidential content.

0 / 10000

Captcha human check

Always on

Invisible check required for every signature.

Add your Turnstile site key in web/config.js.

Verification strength

✅ Baseline 0 / 150

to improve the strength of the signature, add other verifications from below

OAuth identity

Per-signature

Account proof

Connect Google or Apple to verify a real account for this signature.

Show my email on the receipt (+10 pts) Show my profile photo on the receipt (+10 pts)

Proof of payment

$0.50

Amount

Makes automated signing uneconomical at scale.

Verification

Signature receipt

Paste a signature link to load a receipt.

Original content

Sign another message

Provide the text you want to sign. We compute two hashes to handle formatting changes.

Verification confirms a human completed the flow. We attach a signed receipt with metadata.

Copy a signature line that links to a verifiable receipt page.

This MVP uses hosted receipts. Anyone with the receipt link can view the signed text and verify it, so only sign content you are comfortable sharing.

No. It proves a human took responsibility for the signed text.

We compare both a strict hash and a normalized hash to allow copy-paste variations.

Receipts expire after 365 days in the MVP.