Sign PDF
Draw, type or upload a signature and drop it on the page.
Drag to move · corner to resize · hover for All pages / delete
- 100% freeNo account, no daily quota, no paid tier.
- Nothing is uploadedFiles are processed on your device and never reach a server.
- No catch on the outputNo watermark, no forced downscaling, no size cap.
- Updated in the openEvery fix and every new tool is written down on the changelog page.
What this PDF signer does
Drop a contract, form or letter and put your signature on it in a minute, with nothing sent anywhere. Three ways to make a signature: draw it on the pad with a mouse, trackpad, finger or stylus (the stroke gets thinner when you move fast, like a real pen); type your name and get it in a handwriting style; or upload a photo or scan of your signature — the white paper is removed automatically so only the ink remains, and the image is trimmed to the strokes. Choose black, blue or red ink. The signature appears on the page as a box you drag into place and resize from the corner; add as many as you need on any page, plus the date, your printed name, a title or initials as text stamps.
Any item can be set to appear on every page — the usual initials-on-each-page requirement takes one click. The result is written by pdf-lib straight into the document: each signature is embedded once as a transparent PNG and placed at the exact position you chose, on top of the existing content. The original text, form fields and images are untouched. Signatures you create are kept on this device (up to three) so the next document takes one click; you can delete them at any time.
How to use it
Drop or choose the PDF. Make a signature: draw on the pad and press Add to page; or open Type, enter your name and add it; or open Upload, pick an image and add it (untick Remove white background for a signature that is already transparent). The signature lands on the current page — drag it where it belongs, pull the blue corner to resize, use ‹ › to move between pages and repeat wherever another signature is needed. Add date inserts today's date as a text stamp (edit the text first if you need another format); Add text inserts a name, title or initials.
Hover or tap an item to see its buttons: All pages repeats it on every page, × removes it. When everything is in place, press Save signed PDF and download yourfile-signed.pdf. The signed file can go on to Merge PDF to join other documents, Compress PDF before emailing, or PDF to image for a picture of the signed page. Need pages deleted or reordered first? Use Organize PDF.
Common pitfalls
This is a visual signature, not a digital certificate. It puts an image of your signature on the page — legally equivalent to signing a printout and scanning it, and accepted for most everyday contracts, leases, consent forms and applications (in the US under ESIGN, in the EU as a simple electronic signature). It is not a cryptographic signature with a certificate: it does not lock the document, and a reader will not show a green Signed banner. If the other side requires a qualified or certificate-based signature, use the platform they specify.
Once saved, the signature is part of the page content and cannot be dragged around or removed by this tool — keep the unsigned original. Password-protected PDFs cannot be modified; remove the password first. Fillable form fields are not filled by this tool; type the values as text stamps instead, or fill the form in a reader first and sign the flattened result here. Photographed signatures work best on plain white paper in good light; shadows or lined paper leave gray traces after background removal — crop the photo tightly first, or draw the signature instead.
Background: how the signature gets into the file
A signature is captured as a transparent PNG — the drawing pad renders your strokes at three times screen resolution, the typed version is rendered from a cursive font, and an uploaded picture is turned transparent by mapping brightness to opacity so anti-aliased edges stay smooth. pdf-lib embeds that PNG as an image XObject with a soft mask (the alpha channel) and adds a single drawing operator to the page's content stream, so a signature used on 20 pages costs the file one image plus a few bytes per page.
Positions are computed in the page's visual coordinate system, taking the crop box and any /Rotate flag into account, which is why a signature placed on a sideways-stored scan still lands where you put it. Everything — rendering, drawing, embedding, saving — happens in your browser tab; the page works offline once it has loaded, and neither the document nor your signature is ever transmitted.
When you need to sign a PDF
A lease, freelance contract or NDA that arrived by email and has to go back today. School permission slips, medical intake forms and consent forms sent as PDFs. Job offers and onboarding paperwork. Invoices and quotes that need a signature to be valid. Bank and insurance forms that require a wet-look signature and the date on every page. Signing from a phone with a fingertip while away from a printer.
On this site the typical flow is: merge the pages you were sent, sign here, then compress if the reply has to fit an email limit. If the form was sent as photos, image to PDF turns them into a document first; if you only need to send back the signed page, split it out afterwards.
Frequently asked questions
Is my document or signature uploaded?
No. The PDF, the signature and the result exist only in your browser. Nothing is sent to a server, and the page works offline after loading. Saved signatures live in your browser's local storage on this device.
Is this a legally valid signature?
It is a simple electronic signature — an image of your signature placed on the document — which most jurisdictions accept for ordinary contracts and forms. It is not a certificate-based digital signature; if one is required, the other party will say so.
Can I sign on my phone?
Yes. Draw on the pad with your finger, drag the signature into place and save. The pad and the page both respond to touch.
How do I put my initials on every page?
Add the signature or text once, then press All pages in its toolbar. It is repeated at the same position on each page.
Can I remove the signature later?
Not with this tool — it becomes part of the page. Keep the unsigned original and sign a fresh copy if something changes.