Sign a PDF Online
Upload a transparent PNG of your signature, choose the page and position, and apply it to a copy of the PDF. The signature is embedded as an image, so it prints cleanly and works in every PDF reader.
Key facts
- Category
- PDF & Documents
- Price
- Free
- Account
- Not required
- Processing
- In your browser
- Input
- Local files or pasted data
- Platform
- Modern desktop and mobile browsers
What it does
Upload a transparent PNG of your signature, choose the page and position, and apply it to a copy of the PDF. The signature is embedded as an image, so it prints cleanly and works in every PDF reader.
Place an image signature on any page with position, size and opacity controls.
How to use it
Here is the short version of using Sign PDF.
- Open the PDF — Add the document that needs signing.
- Upload your signature — A transparent PNG looks most natural. Adjust the width and opacity so it matches the page.
- Place and download — Choose a page and one of nine positions, then download the signed copy.
Features that matter
What Sign PDF does well.
- Nothing leaves your device — The work happens in your browser tab. There is no upload endpoint in this app, so your files and text cannot be stored, logged or seen by us.
- No upload wait — You skip the round trip to a server entirely. Results are limited by your own CPU, not by network speed or queue size.
- Free, no account, no quotas — No sign-up wall, no watermark, no daily limit. Optional accounts only exist to save favourites and presets across devices.
Frequently asked questions
Is my PDF safe to use here?
Yes. This tool runs entirely in your browser using JavaScript. Nothing you paste or open is sent to a server, and the page keeps no copy after you close it.
Do I need to create an account?
No. Every tool is fully usable without signing in. An account only adds saved favourites and reusable presets.
Does it work on a phone?
Yes. The interface is mobile-first with large touch targets and a stacked layout, so it works on phones and tablets as well as desktops.
Is this a legally binding e-signature?
It creates a visible signature image, which is enough for many internal documents. It is not a certificate-based digital signature. For contracts that require identity verification, use a qualified e-signature provider.
Can I sign every page at once?
This tool places one signature on the page you choose. For multi-page initialling, repeat the process or use the watermark tool with your signature image in a future release.
Open Sign a PDF Online
Try it now — it runs in your browser and needs no account.
Open the tool