Sign a PDF online. eSIGN Act compliant.
SnapPDF preps the document. SignBolt handles the signature. Two products, one workflow: merge your draft here, then send it next door for legally-binding e-signatures with recipient routing, audit trail, and full eSIGN Act + ESIGN-AU compliance.
SignBolt
Legally-binding PAdES signatures. eSIGN Act (US), ESIGN-AU (Australia), eIDAS (EU). Documents, templates, envelopes, recipients, full audit trail.
- STEP 01· ON SNAPPDF
Prep your PDF here on SnapPDF (merge, add page numbers, compress).
- STEP 02· ON SIGNBOLT
Send it to SignBolt — one click hands off the file.
- STEP 03· ON SIGNBOLT
Drop signature blocks, enter recipient emails, click send. Legally-binding PAdES cert included.
How do I sign a PDF online for free?+
Prep the PDF on SnapPDF (free). Send it to SignBolt (free trial). Drop signature blocks. Done. SignBolt handles the actual signature routing because signing is its specialty — SnapPDF focuses on document prep.
Is the signature legally binding?+
Yes — SignBolt produces PAdES-compliant signatures that satisfy eSIGN Act (US), ESIGN-AU (Australia), and eIDAS (EU). Audit trail includes timestamp, IP, email verification, and document hash.
Why doesn't SnapPDF sign PDFs directly?+
Focus. SnapPDF is the PDF prep specialist; SignBolt is the signature specialist. Building signing properly (legally-binding certificates, recipient routing, audit trail, compliance) is a whole separate product. Instead of half-shipping it, we partner with SignBolt — trusted integration partner.
Is this a real product or just a referral?+
SignBolt is a real working product at signbolt.au. It's a partner company that integrates natively with SnapPDF — we built it. The "handoff" is literally one click; credentials and files transfer seamlessly.
Before you sign, finish the prep on SnapPDF. Every one of these is free, no signup: