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Sign PDF
Sign PDF lets you draw a signature with mouse, trackpad or finger, or type your name in a script style, then place that mark on any page of the document. It produces a visible, flattened signature suitable for everyday agreements, not a cryptographic digital signature.
How to use Sign PDF
- Upload the PDF and go to the page where the signature belongs.
- Draw your signature in the pad or generate one from typed text.
- Position and size the signature, then save the signed document and download it.
Where Sign PDF is useful
- Signing a tenancy or supplier form that arrives as a PDF.
- Adding an authorisation signature to an internal expense claim.
- Countersigning a simple letter of intent without printing it.
Formats, algorithms and limits
The signature is drawn onto the page as vector strokes with pdf-lib, so it prints sharply at any zoom and is embedded in the file rather than stored as a removable annotation. Because it is an image-level mark rather than a certificate-backed signature, it does not provide identity verification.
Troubleshooting and honest limits
- Draw a signature you are comfortable sharing — it becomes part of the document and cannot be un-drawn later.
- Place the mark over the signature line and leave the date field for the pen or the typed date.
- For contracts requiring legal non-repudiation, use a qualified e-signature service instead; this is a visual signature.
Frequently asked questions
Is this the same as a digital signature certificate?
No. It places a visual signature on the page. A certificate-based digital signature proves who signed and detects later edits; this tool produces the everyday handwritten-style mark that most forms ask for.
Can I reposition the signature after saving?
Not with this tool — the mark is written into the page content. Re-run the signature on a fresh copy of the original file if the position is wrong.
Does my signature get uploaded?
No. Drawing and stamping happen entirely inside the browser tab, and the signature data is not stored anywhere afterwards.
Can I sign a document I also need to protect?
Yes. Sign first, then run Protect PDF to lock the finished document with a password.
Related tools
Page written and reviewed by the FreeConvertio engineering team on 2026-10-14. Sign PDF runs entirely in your browser — no uploads, no account and no daily limits.