How to Sign a PDF (Free & Private)
Signing a PDF used to mean printing it, signing by hand, and scanning it back — or uploading a private contract to some website. The Sign & Fill PDF tool does it right in your browser: draw your signature, drop it onto the page, fill any form fields, and download the finished file. Your document never leaves your device.
The tool
Sign & Fill PDF
Step by step
- Open Sign & Fill PDFGo to the tool in your browser — no install or sign-up needed.
- Upload your PDFDrop in the file or click to browse. It’s read locally, never uploaded.
- Draw your signatureUse your mouse or finger to sign in the signature box, then click “Use signature”.
- Place it on the pageClick where you want the signature to appear. Add it to more pages or spots if you need to, and fill any form fields in the side panel.
- DownloadClick Apply & download to get your signed, filled PDF.
Why sign in your browser instead of an upload site?
Most “free” online PDF signers upload your document to their servers to process it — which is exactly what you don’t want for a contract, offer letter, or anything with personal details on it. This tool runs entirely on your device with pdf-lib, so your PDF and your signature are never sent anywhere and nothing is stored.
Filling form fields
If your PDF has interactive form fields — the kind you can click into in a PDF reader — they’re detected automatically and listed in the side panel. Type into text boxes, tick checkboxes, and choose from dropdowns; those values are written into the file when you download it. You can fill fields, add a signature, or both.
Is a drawn signature legally valid?
A signature you draw and embed in a PDF is a form of electronic signature, and electronic signatures are widely recognised for everyday agreements. For high-stakes or regulated documents, some situations call for a certificate-based digital signature or a dedicated e-signature service with an audit trail — check the requirements in your jurisdiction if you’re unsure. For most day-to-day signing, a drawn signature is exactly what’s expected.
Tips for a clean result
Draw your signature a little larger than you think — it’s scaled down when placed, so a bigger stroke stays crisp. If a placement isn’t quite right, hover it on the page and click the × to remove it, then click again where you want it. You can sign multiple pages by moving through the document with the Prev/Next controls and clicking on each page.
Frequently asked questions
Is my PDF or signature uploaded?
No — reading the PDF, drawing the signature, filling fields, and building the final file all happen in your browser. Nothing is uploaded or stored.
Can I fill a form and sign in one go?
Yes. Fill any detected form fields in the side panel and place your signature on the page, then download a single PDF with both applied.
Does it cost anything?
No — it’s completely free with no sign-up, like all of Kitolity’s browser-based tools.