Sign PDF
Sign PDF lets you draw your signature and drop it onto a document — no printing or scanning. Sign with a mouse, trackpad or finger, pick the page, click where it goes, and size it to fit. The whole thing happens in your browser, so your document and signature never leave your device.
Add your PDF
The file is read by your browser and stays on your device — there is no upload step.
Your PDF
The work runs in this tab. Nothing is sent anywhere, and the download is generated locally.
Output —Draw a signature
How to use Sign PDF
- 01Upload
Add your PDF
Drop the document in and it renders page by page.
- 02Customize
Draw your signature
Sign in the pad, then click on the page where it should sit and set its size.
- 03Process
Sign
Export to place the signature and download the signed PDF.
What kind of signature this is
The distinction matters, and most people signing a PDF do not know there is one.
A picture of your signature placed on the page. It is what almost everyone means by signing a PDF, and it is legally sufficient for a great many everyday agreements.
A digital signature is a cryptographic certificate that proves who signed and detects any later change. That requires an issued certificate and is a different thing entirely.
Placing it
- On the line
Sitting on or just above the printed signature line, at a size comparable to handwriting.
- With a date
Many agreements expect a date beside the signature. Adding it as text is usually acceptable.
- Every page initialled
Some contracts ask for initials on each page. Check before returning the document.
Worth knowing
Acceptance varies by document — Many jurisdictions accept electronic signatures broadly, but property, wills and some legal instruments often require more. Check what the specific document demands.
Your signature image is sensitive — A clean image of your signature can be reused by anyone who obtains it. Treat the file as you would the ink version.
Nothing is uploaded here — The document and the signature are combined in this tab, which is exactly what you want for a contract.
Supported formats
- Maximum file size —
- bounded by your device's memory
- Processed by —
- pdf-lib, on your device
Your file, and what the page does
Your file is never uploaded. Sign PDF reads it into this browser tab and processes it with pdf-lib on your own device. There is no upload endpoint in the application and no copy on any server — closing the tab discards it.
What the page does send or fetch
- Ads on the page
- The site is funded by advertising, so the page loads Google AdSense. That carries the usual web basics — IP address, browser, referring page — as on any ad-supported site.
- An anonymous usage counter
- When Sign PDF finishes we record that the tool ran, whether it succeeded and how long it took. No file data, no identifier, no cookie.
Your file is not on that list. How this works.
Frequently asked questions
It places a visual signature on the document, which is fine for many everyday agreements. For legally certified signatures, use a dedicated e-signature service.
Yes — page through the document, then click on the page where you want the signature before exporting.
No — the signature is drawn and placed entirely in your browser, and the file never leaves your device.
Yes — Sign PDF is completely free. There's no account, sign-up, watermark or limit.
No. It runs in any modern browser — Chrome, Edge, Safari, Firefox, Brave — with nothing to download or install.
Not sure this is what you need?
- Sign a documentSign PDF
- Mark it as a draftWatermark PDF
- It arrived as photographsImage to PDF
- It is too large to email backCompress PDF
Edit any media with a right-click
Add Dexta Studio to Chrome and open any image, video, audio or PDF straight into the right tool — free, nothing uploaded.