Sign PDF: Stamp Your Signature on a Document
Sign a contract or form without printing it. Upload a picture of your signature, drop it on the right page and corner, and download a signed PDF. Free and private.
or drop a file here · free, no signup, files deleted automatically
How to sign a PDF
- Upload your PDF (drag & drop or browse).
- Choose Sign PDF, upload your signature image (a transparent PNG works best), and pick the page, position and size.
- Download the signed PDF. Both files are deleted from our server automatically.
Why use Forge Files?
- No printing & scanning: sign digitally and keep the document clean.
- Precise placement: choose the page, corner, and width so your signature lands exactly right.
- Free & verifiably private: deleted after download, open source, no signup.
Add your signature to a document
Sign PDF lets you place a signature image onto any page and position it exactly where it belongs (on agreements, forms, and letters) without printing, signing by hand, and re-scanning. Upload a transparent PNG of your signature for the cleanest result.
Before and after signing
- Locked file? Unlock PDF first (on a file you own).
- Combine the signed page back in with Merge PDF.
- Lock it down before sending: Protect PDF.
Is the Sign PDF tool private?
Yes. Your file is uploaded over encrypted HTTPS, processed, handed back, and then deleted — the upload goes the moment the Sign PDF operation finishes and the result the instant you download it, with an hourly sweeper as a backstop. Unlike closed tools that just claim they don't keep your files, Forge Files's code is fully open source, so you can verify exactly how the Sign PDF tool handles your data — or self-host it. No account, no watermark, no upsell. See our privacy details for the full picture.
Frequently asked questions
What signature image should I use?
A PNG with a transparent background looks best, so only the ink shows. A photo of a signature on white paper also works.
Can I place it on a specific page?
Yes, choose the exact page number and the corner (or center) where the signature should sit, plus its width.
Is my document private?
Yes, both your PDF and signature image are deleted right after download, and the code is open source.
More free tools
Protect PDF · Watermark PDF · Add Page Numbers · Merge PDF · Unlock PDF