Sign a PDF online
Sign a PDF online — free, in 60 seconds
Need to e-sign a PDF and there is no printer or scanner around? Upload your document to Stampsig, drop in a signature and a stamp, and download the finished PDF. Everything runs in the browser — no software install.
Sound familiar?
- —You need to sign a PDF right now and you are not at the office
- —The client is waiting for a stamped contract and there is no scanner
- —You need to stamp 20 pages — doing it by hand would take half an hour
- —You have a stamp photo, but the white background ruins it — looks unprofessional
Stampsig lets you sign a PDF online in a minute. No software, works on phone or laptop.
How to sign a PDF — what the tool does
- •Sign a PDF — draw your signature in the editor or upload a photo
- •Add a company stamp or sole-proprietor seal to PDF, Word, or Excel
- •Automatically remove the white background from stamps and signatures — they become transparent
- •Sign every page of a PDF document with one click
- •Download the signed PDF without quality loss
How it works
How to sign a PDF online — step by step
Upload your PDF
Drag the PDF into the browser window or pick it from your device. DOCX, DOC, XLSX, XLS, and image files also work.
Add a stamp
Upload a photo of your stamp or pick from the built-in templates. The white background is removed automatically — the stamp becomes transparent and looks natural on the document.
For the best result, use a clear photo of your stamp on a white background. If the auto-removal isn't perfect, fine-tune the brightness with a single slider.
Transparent background — looks like a real stamp
Uploaded a phone photo of a stamp and got a white box around it? Stampsig automatically removes the background, and the stamp lands on the document with no visible edges. The result looks like a real rubber-stamp impression.
If the background does not come off perfectly, use the built-in brightness slider for fine-tuning — takes a couple of seconds.
Place it on the document
Drag the stamp where it belongs. Resize, rotate, and move until it sits exactly right.
Signed-in users do not have to upload the stamp every time — it is saved to your account.
Sign the PDF
Draw your signature with a finger or mouse right in the editor. Or upload a photo of your pen signature — the background is removed automatically. Place the signature next to the stamp or anywhere else on the document.
Apply signature and stamp to every page (if needed)
Multi-page PDF? One click on "Apply to all pages" places the signature and stamp on every page at the same size and position.
After copying, you can still nudge the stamp on any individual page.
Download the signed PDF
One click — and the signed PDF with the stamp saves to your device. Quality stays intact and the document is ready to send.
Your documents are private
We never see your files. All processing runs directly in your browser — on your own device.
- •Documents are not uploaded to any server
- •No one but you has access to the files
- •When you close the page, data is wiped from browser memory
Supported formats
Documents:
- PDF, DOCX, DOC, XLSX, XLS, JPG, PNG
Stamps and signatures:
- PNG, JPG, JPEG, WEBP
Frequently asked questions
Sign a PDF online — right now
Upload your PDF, add a signature and stamp, download the signed document. The whole process takes less than a minute.