PDFCano

Watermark PDF

Add a personal mark without covering your work.

How to use this tool

1. Enable JavaScript and let the tool load, then select files from your device. Files are processed in browser memory without uploading.
2. Enter watermark text and choose its opacity before generating the result.
3. Process the document, check the result and download it. Keep an unchanged copy of your original.

Good to know

• Type the watermark text and set its opacity and page range. Text your device can display, including Chinese, is drawn as a semi-transparent overlay.
• The original file stays unchanged and the result is a new PDF. Opacity can be set from 10% to 60%.

Encrypted PDFs, interactive forms and digitally signed documents are not supported in this release. Large-file processing depends on device memory.

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