Add a watermark to a PDF
Protect a copy of an ID document or a confidential file with diagonal text, to reduce the risk of identity theft.
Drop your files here
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🔒 Processed on your device, never uploaded
∞ Unlimited: no limit on file size or number of files
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How can I watermark a copy of my ID before sending it?
In Lunyce, add the PDF, type a text such as "Copy for rental application only", choose the colour and opacity, then download the protected file. The diagonal text states who the copy is for, which makes reuse for identity theft harder. Your ID is never uploaded to a server, and the tool is free with no sign-up.
How to
- Add your PDF.
- Type the text (e.g. "Copy for rental application only"), the colour and the opacity.
- Start, then download the protected PDF.
Frequently asked questions
Why watermark a copy of my ID?
Stating who the copy is for and why prevents it from being reused elsewhere, for example for identity theft.
Are my files uploaded to a server?
No. Processing happens entirely in your browser, on your device. No file is uploaded or stored. You can check: once the page has loaded, disconnect from the internet and the tool still works.
Is there a file size or number limit?
No. Since nothing goes through our servers, there is no quota. The only limit is your device's memory: a computer handles very large files more easily than a phone.
Is it really free?
Yes. No sign-up, no watermark added to your documents and no usage limit.