How to Add a Watermark to a PDF to Protect Your Work
Why freelancers, photographers and legal teams stamp drafts before sharing them, and how to do it without ruining readability.
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Security
Watermark PDF on Android
Doing this from a phone often means downloading yet another app just for one task. On Android, My PDF works directly in Chrome or any other mobile browser, so you can handle it from your phone without adding another app to your home screen.
- No registration required
- Files deleted automatically
- Works in any browser
Why This Matters
What Is a PDF Watermark Tool?
Doing this from a phone often means downloading yet another app just for one task. On Android, My PDF works directly in Chrome or any other mobile browser, so you can handle it from your phone without adding another app to your home screen.
A PDF watermark tool stamps custom text diagonally across every page of a document, at an adjustable size and transparency, without permanently altering the underlying content beneath it. The result is a document that visibly carries a label — "DRAFT," "CONFIDENTIAL," a company name — on every single page, in a way that is difficult to simply crop or edit out.
Step by Step
How to Watermark PDF on Android
1
Upload Your PDF
Drag in the document you want to watermark, or click to browse and select it. On Android, tap the upload area to open your file picker, or share directly from your gallery or Files app.
2
Enter Your Watermark Text
Type the text you want stamped across every page, and adjust its font size and opacity.
3
Click Add Watermark
Our server stamps the watermark diagonally across every page, typically within seconds.
4
Download the Watermarked File
Save your PDF with the watermark applied consistently throughout.
Get Better Results
Tips
- Lower the Opacity for Legibility — A lighter, more transparent watermark keeps the underlying content fully readable while still being clearly visible.
- Increase Font Size for Emphasis — If the goal is to make the watermark impossible to miss, use a larger font size alongside a higher opacity.
- Use the "Files" app or your gallery's share option to select the file, or upload it directly if it's already saved to your device.
- If a file is coming from Google Drive or another cloud app, download it locally to your device first, then upload it from there.
Avoid These
Common Mistakes
- Uploading a file that is already password-protected without unlocking it first — most operations require an unencrypted starting file.
- Assuming a converted or compressed file replaces the need for the original — keep your source file until you have confirmed the result looks right.
- Not checking the 50 MB upload size limit before starting, then wondering why a very large scan fails to upload.
- Searching an app store for a dedicated app when a mobile browser already does the job without extra storage or permissions.
Frequently Asked Questions
Yes — enter any text you like, such as "DRAFT," "CONFIDENTIAL," your name, or a company label.
Yes — the same watermark is stamped across every page of the document in one operation.
Yes — adjust the opacity to make it more subtle or more prominent, and the font size to control how large it appears.
No — it works directly in Chrome or any other Android browser, with nothing to install.
Download it to your device first, then upload it from your device's file picker — direct cloud-drive linking isn't supported yet.
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