Draw your signature, drop in a PDF, and place the mark on any page with millimetre coordinates, embedded as a transparent PNG.
Your drawing and your PDF are combined locally with pdf-lib. Neither ever leaves your device.
Use a mouse, finger or stylus. Undo removes the last stroke.
Drop a PDF here or click to browse
Positions are millimetres measured from the bottom-left corner of the page — the same origin PDF uses. There is no rendered page preview: set the numbers, download, and nudge if needed.
Your signature is captured on a plain HTML canvas and exported as a transparent PNG; the open-source pdf-lib library then embeds that image into the PDF. Every step happens inside your browser tab — no upload and no page rendering.
Broadly, many legal systems (the US ESIGN Act, the EU's eIDAS regulation and equivalents elsewhere) accept a simple electronic signature on most agreements — a drawing you make over your own name on a document expresses intent. What a plain image stamp cannot show is signer authentication and tamper evidence, which is often what disputes turn on. For high-stakes agreements use a signing platform with certificates and an audit trail. Nothing here is legal advice.
No. This tool pastes your signature as an image onto the page; the file stays fully editable and unencrypted. A true digital signature is different: it applies a cryptographic seal with a certificate so any later edit invalidates it. That requires keys issued by a certificate authority and is out of scope for an in-browser stamp.
Both end up as an image painted onto a PDF — visually there is little difference. The difference is provenance: with a wet-ink scan the paper original existed and a chain of custody can start from it, while a signature applied here has no independent record of when or by whom. If the receiving party demands the wet-ink original, an image in a PDF will not substitute for it.
Use the millimetre model: X and Y are distances from the bottom-left corner of the page, measured the same way a ruler on paper would be. On A4 (210 × 297 mm) a typical signature line sits around X 20–130 and Y 30–60. Apply, open the download, and nudge the numbers — one iteration is usually enough.
No. Your drawing stays in memory as a transparent PNG and the PDF is parsed, stamped and re-saved with pdf-lib in your browser. There is no upload step, no account, and no network request containing either file.
If you just finished with Sign a PDF, the natural next steps are PDF Metadata Editor, DOCX to PDF, Signature Generator, or browse every tool in Privacy File Tools.