- 1Upload
- 2Process
- 3Download
Stamp PDF online, free
Apply preset stamps — Approved, Draft, Confidential, Paid — or your own image.
- Runs in your browser — no upload
- Free, no sign-up, no watermark
How to use Stamp PDF
- 1
Add your PDF file
Drop a file on the page, paste it, or click Select Files. Nothing is uploaded — it opens straight in your browser.
- 2
Fine-tune the settings
Set position in the Fine-tune panel, or keep the defaults — they suit most files.
- 3
Run Stamp PDF
Press the start button. Processing happens on your device, usually in seconds.
- 4
Download the result
Save the finished file, or continue with another tool without downloading in between.
What Stamp PDF can do
- Position: top right, top left, center, bottom right and bottom left
- Private by design — files are processed in your browser and never uploaded
- Free with no sign-up, no watermark and no daily limit
Stamp PDF — frequently asked questions
Is Stamp PDF really free?
Yes. Stamp PDF is free forever on Sada Files — no ads, no premium tier, no watermark, no daily cap that pushes you to pay. Every option on this page is available to everyone.
Do I need to sign up or create an account?
No. There is no account system at Sada Files. Open the page, drop your file, pick your options and save the result. History and saved workflows stay on your device.
Is my file uploaded anywhere?
No. Stamp PDF runs on your device — in your browser using WebAssembly, or inside the free native app. Your file never leaves your computer or phone, which is why there is no upload wait.
Which formats does Stamp PDF accept?
Stamp PDF accepts PDF. Files are identified by their content, not their extension, so a mislabelled file still works.
Is there a file size or file count limit?
Only what your device can handle. Because processing happens locally there is no server cap, no queue and no "upgrade for larger files" message.
Can I chain Stamp PDF with other tools?
Yes. After every result a Continue with… menu lists every tool that accepts this output, and the file is handed over in memory. Save the chain as a workflow and re-run it on hundreds of files, or call it in one API request.
Does Stamp PDF work on my phone?
Yes. The web app works on Android and iOS browsers, and the free Sada Files app for Android, iOS, Windows, Linux and macOS runs Stamp PDF fully offline.
Related tools
- Watermark PDFAdd a text or image watermark with opacity, rotation, tiling, position, page range and above- or below-content placement.
- Sign PDFDraw, type or upload your signature and initials, add a date and place them anywhere — reusable signatures are saved on your device.
- Add Page NumbersStamp page numbers in any of nine positions with formats like 1, Page 1 of N or i, ii, iii — start number, font, margins and skipped pages.
- Bates NumberingLegal Bates numbering with prefix, suffix, zero padding and start number across one or many files.
- Edit PDFAdd and edit text, images, shapes, freehand drawing, highlights, sticky notes and links on any PDF with undo and redo.
- Invert Colors (Dark Mode PDF)Invert a PDF for night reading — full invert or smart mode that keeps photos natural.
- PDF AttachmentsEmbed files into a PDF or extract the files already attached.
- Add BackgroundPut a colour, an image or another PDF behind every page.