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Sign PDF
Sign documents electronically with a drawn, typed, or uploaded signature. Legally binding, completely private, and instantly downloadable.
Everything you need to sign PDF documents
18 powerful signing features for professional, legally binding signatures.
Draw Your Signature
Draw your signature directly on the screen with your mouse or finger. Smooth bezier curves produce a natural, realistic signature every time.
Type Your Signature
Choose from multiple elegant signature fonts and type your name. Perfect for professional documents that need a clean, consistent look.
Upload Signature Image
Upload a scanned image of your handwritten signature. Position, resize, and place it precisely on any page of your document.
Drag & Drop Placement
Move your signature anywhere on the page with intuitive drag-and-drop. Snap-to-grid alignment ensures pixel-perfect positioning.
Add Date & Time Stamp
Automatically insert the current date next to your signature. Choose from multiple date formats to match your document requirements.
Multiple Signatures
Add signatures from multiple signers on the same document. Each signer gets their own labeled signature field with date stamp.
Resize & Rotate
Adjust signature size with drag handles. Rotate to any angle for awkward placement scenarios. Fine-tune opacity for subtle signing.
100% Client-Side Privacy
Your documents and signatures never leave your browser. All signing happens locally — no uploads, no servers, no data collection.
Legally Binding
Electronic signatures created with Sign PDF are legally valid under ESIGN Act, UETA, and eIDAS regulations for most document types.
Audit Trail
Optionally embed signing metadata including timestamp, signer identity, and document hash for verification and audit purposes.
Unlimited Signing
Sign as many documents as you want, as many times as you need. No daily limits, no per-document fees, no subscription required.
Live Page Preview
See your PDF pages rendered in real-time as you position signatures. Navigate between pages and verify placement before downloading.
Opacity Control
Fine-tune signature transparency from solid to semi-transparent. Perfect for subtle watermarking or overlaying on pre-printed forms.
Ink Color Picker
Choose from black, blue, or custom ink colors for your signature. Match traditional signing conventions or add a personal touch.
Save Signatures
Store multiple signature variants for reuse. Switch between personal, formal, and initial signatures without redrawing each time.
Custom Date Stamps
Add customizable date and time stamps in multiple formats. Position independently or alongside any signature on any page.
Instant Download
Download your signed PDF immediately after signing. The output is a standard PDF with your signature embedded — no watermarks.
Sign your PDF in 3 simple steps
Upload Your PDF
Drag and drop the document you need to sign. Your file loads instantly in the browser — nothing is uploaded to any server.
Create & Place Signature
Draw, type, or upload your signature. Drag it to the correct position on the page. Add date stamps or additional signer signatures as needed.
Download Signed PDF
Click download to save your signed document. The signature is permanently embedded in the PDF — ready to share, print, or archive.
What you can sign with Sign PDF
From contracts to consent forms — sign anything, anywhere.
Sign Contracts
Sign employment agreements, vendor contracts, and business deals without printing, signing, and scanning.
Complete Forms
Sign tax forms, application forms, and government paperwork electronically. No more print-sign-scan cycles.
Approve Documents
Add your approval signature to reports, proposals, or creative work. Speed up review and approval workflows.
Sign Leases & Agreements
Sign rental agreements, NDAs, and legal documents from any device. Perfect for remote signing scenarios.
Sign Invoices & POs
Authorize purchase orders, approve invoices, and sign financial documents with a professional electronic signature.
Sign Consent Forms
Sign medical consent forms, parental permission slips, and other consent documents quickly and securely.
The private way to sign documents
No uploads. No accounts. No per-document fees.
Get the perfect electronic signature
Use a Stylus for Best Results
If you are on a touch device, use a stylus or Apple Pencil for the most natural-looking drawn signature. The pressure sensitivity creates realistic stroke variation.
Save Your Signature for Reuse
Once you create a signature you like, save the image file. You can upload it for future documents to maintain consistency across all your signed paperwork.
Choose the Right Font
When typing your signature, try multiple font options. Some fonts look more formal, others more casual. Pick one that matches your document context.
Position at the Right Size
Your signature should be proportional to the signature line. A good rule of thumb: make it 60-80% of the line width for a natural appearance.
Add a Date Stamp
Always include a date next to your signature. This establishes when the document was signed, which is important for legal and audit purposes.
Flatten After Signing
After signing, consider using our Flatten PDF tool to make the signature permanent and prevent any further edits to the document.
PDFly vs. other signing solutions
See how Sign PDF compares to paid e-sign platforms and desktop tools.
| Feature | PDFly | Paid E-Sign | Print & Scan |
|---|---|---|---|
| Privacy — no uploads | |||
| No signup required | |||
| No per-document fees | |||
| Draw signature by hand | |||
| Works on any device | |||
| No watermarks on output | |||
| Free with no limits | |||
| No installation needed |
Your signatures and documents stay private
Sign PDF runs 100% client-side. Your documents and signatures are never uploaded to any server — all signing happens on your device. Zero data collection, zero tracking, zero risk of your sensitive legal documents being intercepted or stored by third parties.
Frequently asked questions
Ready to sign your document?
Draw, type, or upload your signature in seconds. No signup, no uploads, no watermarks.
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