Any agreement. Signed in minutes.
Pick a contract type, fill in the details, and both parties e-sign from their own phones. The exact text you both signed is frozen and hash-chained — so you can prove, anytime, that nothing changed. Free. No account.
- SHA-256 hash-chained
- E-SIGN / UETA-oriented
- No app · no account · no card
- Free & instant
Real agreements, without the lawyer.
Concrete protection you can point to — not promises. Here is exactly what PactStamp does.
Tamper-evident, provably
The exact text both parties signed is frozen and SHA-256 hash-chained. A built-in verify check re-computes the hash and proves nothing was changed after signing — no notary, no trust required.
Two-phone signing
You sign on your device; the other party signs from a private link — no app, no account, no card on either side.
Photo evidence, bound by hash
Capture condition for a sale, rental, or job. Each photo is cryptographically bound to the signed document — and always optional, never blocking the signature.
8 purpose-built types
Sale, rental, loan/IOU, NDA, freelance, roommate, privacy, and service/repair — each with the right fields and clauses, not a blank page.
5 languages, pinned
English, Spanish, Russian, Vietnamese, and Tagalog. The document language is pinned at signing, so both sides sign the same words.
Free & instant
No paywall and no setup. Built around U.S. E-SIGN / UETA e-signature expectations, so a clear signed record is ready the moment both parties sign.
Honest by design — not a law firm
PactStamp is a self-help document tool, not legal advice. The templates are a solid starting point — for high-value or complex matters, have a licensed attorney review your agreement first.
Proof that nothing changed.
A signed PDF can be edited. A PactStamp record cannot be edited unnoticed — the math gives it away.
- 1Signed text is frozen
At signing, the full document is snapshotted word-for-word — what each party agreed to never drifts.
- 2Each step is hash-chained
Every signature and photo links to the one before it with a SHA-256 hash — re-signing adds to history, it never erases it.
- 3Anyone can verify
A one-tap check re-computes the chain. If a single character changed, it fails — so the record proves itself.
- Document snapshot
9f2c…a17e - Party A signature
c4b8…0d93 - Party B signature
7e10…ff52
SHA-256 hash chain re-computed. Document unchanged since signing.
Eight kinds of contract, ready to sign.
Each type asks only the right questions and builds the right clauses — pick one and start.
From blank to both-signed, fast.
- 01
Pick a type
Choose from eight contract types — each with the right fields and clauses.
- 02
Fill it in
A short wizard fills the document. Add photos if it helps — always optional.
- 03
Both sign
You sign on your device; the other party signs from a private link.
- 04
On the record
Both signatures lock to one tamper-evident copy you can verify anytime.
Sign in the language you both understand.
The document language is pinned at signing, so both parties sign exactly the same words.
- English
- Español
- Русский
- Tiếng Việt
- Tagalog
Your next agreement, on the record.
Any of eight types, e-signed by both parties, with a tamper-evident copy you can verify. Free, no account, no card.
Self-help document tool · not a law firm · not legal advice