No software. No plugins. Works on any device.

Sign any PDF online.
AI handles the rest.

Upload your PDF and place your signature in seconds. Need a document first? Tell Amanda AI — she generates it, places the fields, and sends it for signing. You sign. Every signed PDF gets open-standards verification proof built in.

Sign any PDF in under a minute

Three steps. No software, no accounts for signers, no friction.

01

Upload your PDF

Drag and drop or click to upload any standard PDF up to 10MB. Your file is encrypted in transit.

02

Place your signature

Type your name with handwriting fonts, draw with a finger or mouse, or select a saved signature. Add date and text fields too.

03

Download or send

Self-sign and download instantly, or send a signing link to recipients. Every signed PDF includes verification proof and an audit trail.

Your signature, your way

Three ways to sign. Save unlimited signatures and reuse them across all your documents with one click.

Type to sign

Type your name and choose from four handwriting-style fonts. Your typed signature looks natural and professional.

Draw to sign

Draw your signature with a mouse, finger, or stylus on the canvas. Adjust stroke width and color for a natural result.

Upload signature

Upload an existing signature image (PNG, JPG). SignForge automatically extracts the signature and removes the background.

AI-powered

Don't have a PDF yet? Tell Amanda what you need.

Amanda AI can generate legal documents from a description — NDAs, service agreements, employment contracts, and 12+ document types. She drafts the document, places signature fields, adds recipients, and sends it for signing. You review and approve at every step.

You:"Create an NDA for my freelance project"
Amanda:Draft ready. Review and I'll send it.

3 AI documents/month on Free. 25/month on Pro ($9/mo).

What you get with every signed PDF

Every document signed through SignForge gets open-standards verification proof embedded in the PDF — portable, offline-verifiable, and not locked to any vendor.

W3C Verifiable Credential

An open-standard signing receipt (W3C VC 2.0) embedded in your PDF with a DataIntegrityProof.

Transparency log entry

Recorded in a public Merkle transparency log with Signed Tree Heads. Anyone can audit it.

Offline verification

Public keys embedded in the PDF. Verify without contacting SignForge — even if we shut down.

QR code & audit trail

Scan-to-verify QR on every signed PDF. Full audit certificate with timestamps, IPs, and hashes.

Verify any SignForge document at signforge.io/verify or browse the public transparency log.

More than a PDF signer

SignForge is a full e-signature platform with AI document generation, workflow automation, and a suite of PDF tools.

AI document generation

Tell Amanda to draft an NDA, service agreement, or employment contract. She generates the document, places fields, and prepares it for signing.

46 templates

Start from default templates across business, legal, and HR categories. Create your own custom templates on Pro ($9/mo).

12 field types

Signature, date, name, and text are free. Pro adds initials, checkbox, dropdown, radio, email, company, attachment, and stamp/seal.

Reminders & workflow

Auto-reminders for unsigned envelopes, CC recipients for visibility, signing order for sequential workflows, and scheduled sending.

Document locker

A private encrypted vault for signed agreements. Organize by category, search by name, set expiry dates, and download anytime.

12 PDF tools

Merge, split, compress, rotate, watermark, unlock, page numbers, image conversion, signature tools, and fill & sign. All free.

Legally valid. Globally recognized.

Since 2000

ESIGN Act (USA)

Electronic signatures have the same legal standing as handwritten signatures since 2000.

Since 2014

eIDAS (EU)

Legal framework for electronic signatures across all EU member states.

Since 1999

UETA (US States)

Consistent rules for electronic signatures adopted by 49 US states.

Frequently asked questions

Is signing a PDF online legally binding?

Yes. Electronic signatures are legally binding under the ESIGN Act (USA), eIDAS (EU), and UETA. SignForge captures IP address, timestamp, and signer consent, and embeds a W3C Verifiable Credential in every signed PDF.

Do I need to install software?

No. SignForge runs entirely in your browser. Upload your PDF, sign, and download — from any device. No plugins, no desktop apps.

Can AI help me sign a PDF?

Amanda AI can generate documents, place signature fields, and send envelopes — but the actual signature always requires you. AI handles the workflow; you provide the signature.

Can I sign my own PDF without emailing it?

Yes. Use self-sign to upload a PDF, place your signature, and sign immediately. Download the signed PDF with verification proof right away — no email link needed.

How are signed PDFs verified?

Every signed PDF gets a W3C Verifiable Credential 2.0 receipt, embedded public keys for offline verification, and a record in a public Merkle transparency log. Verify by scanning the QR code, uploading at signforge.io/verify, or querying the API.

Can I save my signature for reuse?

Yes. Save unlimited signatures to your account — typed, drawn, or uploaded. Reuse any saved signature across all your documents with one click.

Is it really free?

The free plan includes unlimited sends (3 recipients), 4 field types, 3 AI documents/month, Amanda AI assistant, 30 templates, open-standards verification (W3C VC + transparency log), locker, and 12 PDF tools. No credit card required. Pro ($9/month) adds 5 recipients, more field types, templates, reminders, and AI quota.

Stop printing. Start signing.

Sign any PDF online with AI assistance and open-standards verification. Free to start — no credit card, no time limit.

Sign your first PDF

Free forever. Upgrade to Pro for $9/mo when you need more.