Portable trust, not platform lock-in

Sign a PDF.
Leave a trail.

Place a handwritten signature onto your own PDF, finalize an exact signed copy, and carry its verification receipt with you. Your file never leaves this browser.

✓ Real PDF input ✓ Local signature placement ✓ Portable Proof Capsule

Drop your PDF here

Or choose a PDF from this device.
Maximum recommended size: 25 MB.

No document data is sent to a server.

Independent local comparison

Check the exact signed file.

Choose a signed PDF and its Proof Capsule. SignTrail recalculates the PDF fingerprint and checks the receipt structure and integrity digest entirely in this browser.

1. Signed PDF

The exact PDF exported when the document was finalized.

No PDF selected

2. Proof Capsule

The JSON receipt downloaded alongside the signed PDF.

No receipt selected

This confirms byte-for-byte document matching. It does not authenticate a signer’s legal identity or guarantee enforceability.