“A promise made is a debt unpaid.”
Sign PDF Online
Prepare a PDF for signing by drawing, typing, or uploading a signature, placing it precisely, and downloading a signed copy. No account and no paid plan needed.
How to use Sign PDF online
- 1
Upload your files
Drag and drop or click to select your file(s). Uploads go directly to encrypted cloud storage over HTTPS. (PDF)
- 2
Run the tool: Sign PDF
Processing happens instantly in the cloud — no software to install, works on Windows, Mac, Linux, iOS and Android.
- 3
Download the result
Get your processed file via a secure temporary link. All files are deleted automatically about a day after upload.
Frequently asked questions
What access does Sign PDF require?
None — you can sign a document without an account or a paid plan. Each run spends credits from your daily allowance, and you'll only be asked to sign in once that runs out. Signing in also keeps a signing history you can come back to; a guest run isn't recorded anywhere.
Is an electronic signature on a PDF legally binding?
Yes, in most jurisdictions — the US ESIGN Act, UETA, and the EU's eIDAS regulation all recognize electronically signed documents as legally binding for the vast majority of business and personal use cases. A handful of document types (wills, certain court filings) still require a wet-ink or notarized signature — check your local requirements if in doubt.
What's the difference between draw, type, and upload?
Draw lets you sign with your mouse, finger, or stylus for a natural handwritten look. Type renders your name in a handwriting-style font — fast and consistent. Upload lets you use a photo or scan of your actual signature, including PNG files with a transparent background.
Can I add signature fields for multiple people?
Yes — place as many signature and initials fields as you need, on any page, then share the resulting PDF with each signer in turn (or use Merge PDF to combine separately-signed copies into one final record).
Does the AI actually find where to sign?
It scans the document's text for common signature-block labels ("Signature", "Signed By", "Authorized Signature", and similar) and suggests a placement box next to each one you can accept with one click — it's a fast heuristic, not a guarantee, so always double-check placement before downloading.
How this compares to typical PDF signing tools
| Feature | NexaPDF AI | Typical tool |
|---|---|---|
| Draw, type, or upload a signature | ||
| AI-suggested signature placement | ||
| Free with no watermark | Paid tier only | |
| Free account is enough — no paid plan | Paid tier only | |
| Files auto-deleted after use |
“Typical tool” reflects common limits on popular free-tier PDF signing services as of this writing — check current pricing pages, as terms change.
Built for documents you actually care about
Encrypted in transit
Every upload and download happens over HTTPS straight to encrypted cloud storage — never plain HTTP, never a third-party relay.
Auto-deleted after about a day
Your original file and the signed result are automatically and permanently deleted from storage 24 hours after upload — no manual cleanup needed, nothing lingers.
Never shared or indexed
Files are private to your session, addressed only by an unguessable link, and are never used for AI training, analytics, or shared with any third party.
Nothing uploads until you apply
The PDF is rendered and edited entirely in your browser. Nothing leaves your device until you click Apply & Download — you can draw, place, and rearrange signatures freely with zero network activity.
Commonly used with this tool
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Ready to sign your document?
No sign-up, no watermark, no software to install — draw, type, or upload your signature and download in seconds.
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