Sign PDF
Draw, type, or upload your signature and place it on any page.
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Draw, type, or upload your signature and place it on any page.
or click to browse
Sign with a finger on a phone or tablet, or with a mouse or trackpad on a computer. Touch input is the one that actually looks like your signature; a mouse takes a couple of attempts, and there is no penalty for clearing and starting again. This is the closest thing to signing on paper and the natural choice for agreements and letters.
Type your name and it is rendered in a signature-style script. Fast, legible, and consistent every time — which is exactly what you want on internal approvals, expense forms and routine paperwork where a recognisable mark matters more than a personal flourish.
Photograph your real signature on paper and upload the picture. The tool lifts the ink off the background rather than pasting a grey rectangle onto the page: the paper is detected and removed, and the ink is kept with soft edges so it sits on the document as though it were signed there. Ordinary phone photos work — the paper in a typical indoor snapshot is nowhere near white, and that is handled. A plain sheet, reasonable light, no heavy shadow across the writing.
Once you have a signature you like, save it to the library and it is one tap away next time. Signatures and initials are kept in separate collections, since most documents that need initials need a full signature somewhere too.
Contracts frequently want initials on every page and a full signature at the end. Apply to all pages places the mark at the same relative position throughout, so it lands correctly whether the document is A4, Letter, or a mix — the position is stored as a proportion of the page rather than a fixed coordinate, which is why it survives mixed page sizes.
The usual pattern: place your initials in a corner, tick Apply to all pages, then add the full signature on the final page on its own. Preview before saving and step through the pages to confirm nothing has landed on top of text.
The signature is drawn into the page itself, not attached as a comment or an annotation layer that another reader might hide or strip. Open the file anywhere — Acrobat, Preview, Chrome, a phone — and the signature is simply part of the document.
A few other things are written in alongside it. The date stamp, when you enable it, is rendered in an embedded standard font so it displays identically on every machine. A discreet audit line records that the document was signed and when. And the document's own properties are updated — subject, keywords and producer carry the signing timestamp and a session identifier, so the provenance travels with the file rather than living in a separate service you would have to log into later.
The rest of the document is untouched. Existing text stays selectable and searchable, images keep their resolution, and any form fields keep working. Signing does not rasterise your document.
The signature this tool produces is an electronic signature — the same category as signing on a tablet at a delivery, or typing your name at the end of an agreement. Electronic signatures are recognised for most everyday business use under the frameworks that govern this: the ESIGN Act and UETA in the United States, eIDAS in the European Union, and the Information Technology Act in India, among others. In practice that covers the overwhelming majority of what people sign — NDAs, employment offers, vendor agreements, consent forms, rental documents, invoices and internal approvals.
A separate mechanism exists for the narrower set of documents that require it: a certificate-based digital signature, issued by a Certifying Authority, which cryptographically binds a verified identity to the file. Some tax filings, tender submissions and land records ask for that specifically, and it is a different workflow involving a token or a certificate from an accredited issuer. If a document or portal names a Digital Signature Certificate, that is what it is asking for.
For anything short of that bar, drawing your signature here and sending the PDF is the ordinary, accepted route — and it keeps the document on your own machine, which is more than can be said for most signing services.
It is an electronic signature, which is recognised for most everyday business and personal agreements under ESIGN and UETA in the US, eIDAS in the EU, and the IT Act in India. NDAs, offer letters, vendor contracts, consent forms and rental agreements are all routinely signed this way. Documents that specifically require a certificate-based Digital Signature Certificate — certain tax filings and tender submissions — use a different mechanism involving an accredited Certifying Authority. This is general information rather than legal advice; check the requirement stated on the document itself.
Yes. Tick Include date to stamp the date beside the signature in a clean embedded font. Initials are kept as their own collection in the signature library, so the common pattern — initials on every page via Apply to all pages, full signature on the last page — takes about thirty seconds.
The signature is drawn into the page content rather than added as an annotation, so it is not something a reader can simply toggle off or delete in a viewer. For an extra measure on documents heading outside your organisation, Protect PDF adds a password and permission restrictions to the finished file.
Yes, and it is a good route — a real signature photographed on a plain sheet looks better than most drawn attempts. The ink is separated from the paper automatically, so you get the writing with soft, natural edges rather than a pale box stamped onto the document. Everyday phone photos are fine; the paper in an indoor photo is far from white and that is expected and handled.
No. The signature library lives in your own browser's local storage on this device, so it is there next time you visit and it is not synced, transmitted or readable by anyone else. Clearing your browser's site data removes it, so re-save a signature you rely on after a clean-out.
No. Text stays selectable and searchable, images keep their original resolution, and vector artwork stays sharp. The signature, date and audit line are added to the page; nothing existing is re-rendered or degraded.
Fill first, sign second. Use Fill PDF Form to complete the fields, save, then bring that file here to sign. If the PDF has no interactive fields at all, Edit PDF places text anywhere on the page, which covers the printed-form case.
No, and this is the main reason to use it. Everything — rendering the page, cutting the ink out of your photo, drawing the signature into the document, writing the file — happens inside this browser tab. The contract you are signing never travels anywhere. You can go offline before you start and it still works.
Privacy: Your signature, the PDF, and the signed output all stay inside your browser tab. pdf-lib writes the signature image onto the page locally — nothing is uploaded.