HashSign: Sign PDF & Contracts

HashSign is a Texas-based app for signing PDFs and contracts on your phone, with a tamper-evident record of what you signed.

Start free. Sign agreements and everyday paperwork, and use HashSign AI to flag clauses worth a second look before you sign. It flags clauses for your review and is not legal advice.

HOW IT WORKS

- Your document stays on your device until you choose to send or share it.
- HashSign creates a SHA-384 digest of the sealed PDF. Only that digest is anchored, never the document itself.
- Hedera anchoring is a paid feature. It adds a public, tamper-evident timestamp you can check later.
- Optional cloud review with HashSign AI runs only when you tap it.
- Encrypted messaging lets you send documents and talk with the people you sign with.
- Face Signature is available in the US only.

GOOD TO KNOW

- A hash shows that a document has not changed since it was sealed. It does not prove who signed it.
- HashSign is not a licensed notary service and does not replace one when the law requires a notary.

Questions or feedback: support@hashsign.app

Recent changes:
• 3-Tab Legal Inspect Drawer: Review Red Flags, Obligations, and Key Terms over your PDF with 1-tap Page Jump.
• Multi-Doc Chat Composer & Share: Stage up to 3 PDFs inside the message box or send clauses directly to encrypted chats with 1-tap Return to Doc.
• Official Company Seal: Streamlined registration supporting 2+ character business acronyms.
• UI & Support Overhaul: Sleek segmented tabs, high-contrast document cards, and upgraded Help & Support in Settings.