PDF Tools
Add Watermark
Overlay a diagonal text watermark across every page.
- Free to use
- No sign-up
- Instant download
Your file is processed securely and automatically deleted from our servers within 1 hour.
Working on it…
Processing your file — the download starts automatically when it’s ready.
Your file downloads automatically
Choose your file above and run the tool — the result is sent straight to your browser.
About this tool
Stamp a diagonal text mark such as CONFIDENTIAL, DRAFT or your company name across every sheet of a document. Choose the wording and how faint it should be, then download the marked copy.
How to use it
- Upload your PDF.
- Type the text you want, for example
DRAFT. - Set the opacity (5–80%) and run the tool.
Choosing the opacity
Around 15–25% is visible without making the content hard to read. Go higher for proofs and samples you want clearly marked, lower for subtle branding.
Popular wording
- CONFIDENTIAL – internal reports and HR paperwork
- DRAFT – versions still under review
- SAMPLE or PREVIEW – work shared before payment
- COPY – duplicates of original certificates
- Your brand or website name – to show where a file came from
What a mark can and cannot do
It clearly labels a document and discourages casual reuse, but it is not a lock. Someone determined can still screenshot or edit the file. For real access control, combine it with our Protect PDF tool.
Good to know
The same mark is placed diagonally on every sheet. Review the result to make sure it does not hide key figures. Uploads are deleted from our server shortly after processing.
A worked example
A photographer sends clients a proof booklet before payment. Adding the word PROOF at 25% opacity lets clients choose their favourite shots while making it clear the booklet is not the final product.
Readable but visible
- Short words in capitals, such as DRAFT or COPY, work best diagonally.
- Low opacity keeps text readable underneath; increase it for proofs.
- Test on a sheet with dense text or dark images before sending the whole document.
Common business uses
- Marking internal reports as CONFIDENTIAL
- Labelling versions as DRAFT during reviews
- Stamping certificates as COPY when sharing duplicates
- Adding your brand name to sample chapters or templates
Combine with other protection
For sensitive files, lock them with Protect PDF after adding the mark. The label tells readers how to treat the document; the password controls who can open it.
Related tools
- Protect PDF – restrict who can open the file
- Add Page Numbers – number marked drafts
- Compare PDF – check changes between drafts
Step by step: sending a draft for review
- Add the word DRAFT at around 20% opacity.
- Add page numbers so reviewers can refer to specific sheets.
- Send it with a clear deadline for comments.
- Remove the mark only from the final, approved version.
Clear labelling prevents an unfinished version from being mistaken for the final document and forwarded to clients or the public.