✍️ PDF300
Sign a PDF without printing it
The old way is print, sign, scan, and the scan comes out crooked. Drop a picture of your signature onto the page instead, move it to the line, and save.
Open the toolRuns entirely in your browser. The file never leaves your device.
How it works
- Add the PDF and the signature imageA photo of your signature on white paper works. So does a PNG with a clear background.
- Put it where it goesDrag it onto the line and size it.
- DownloadSave the signed file.
Questions
No. This tool runs in your browser with JavaScript, so the file never leaves your device. Once the page has loaded you can even go offline and it still works.
Neither. No account, no watermark on the output. The practical limit is your device memory — large scanned files use more of it.
Guide: signing well
When you'd use this
A form that asks for a signature but will be returned as a PDF, not on paper — a rental agreement, a consent form, an acknowledgement at the end of a document. Printing, signing by hand, scanning and re-uploading works, but it is slow and the scan is often crooked or shadowed. Placing an image of your signature directly onto the page skips the print-and-scan step entirely.
Getting a good signature image
Two sources work well: a photo of your signature written on plain white paper, cropped close and with the background as even as possible, or a PNG saved with a transparent background, which sits more cleanly on the page since there is no white rectangle around it. A signature or stamp extracted with a dedicated stamp tool can be used as-is. Avoid a photo taken at an angle or in uneven light — the tool does not clean up the image, so whatever is in the file is what lands on the page.
Placing it
Once a PDF and a signature image are both loaded, click the page preview where the signature should go; it can then be resized using the scale control until it matches the space available on the signature line. Multiple signature images can be kept in the tray at once — useful if a document needs both a signature and a separate initial or stamp — and the last placement can be undone if it lands in the wrong spot.
What this is, and is not
This places a picture of a signature onto the page — visually identical to signing a printout and scanning it, but without the printer. It does not create a cryptographic digital signature (the kind backed by a certificate that a PDF viewer can verify and that shows up as a signature field with validation status). For documents that specifically require that kind of certificate-based signature — some legal filings, certain government portals — this tool will not satisfy the requirement, and a dedicated digital-signature service is needed instead. For everything that would otherwise be signed by hand and scanned, this does the same job faster.
More questions
It carries the same weight as a scanned handwritten signature, which is accepted in many everyday situations but is not the same as a certificate-backed digital signature. Check what the specific form or counterparty requires before relying on it for anything formal.
Save the PNG you used somewhere you can find it again — the tool does not store it between sessions, since nothing about your files is kept on our side.
Adjust the scale control before saving; once downloaded, the signature is flattened into the page and cannot be resized without starting over.
Yes — place the image once per page as needed. For a very long document, consider whether a single signature on a final page is actually what is required instead.