Your files remain on your device
Processing happens inside the browser tab. Refreshing or closing the tab clears the current file queue.
PDF · Processed on your device
Watermark PDF
Apply a custom diagonal text watermark across every PDF page without uploading the document.
PDF
INPUT
Choose a source file
Source files remain in this browser tab for device-processed tools.
HOW IT WORKS
Three clear steps
No hidden queue, upgrade screen or misleading result state.
- 01
Choose a PDF
- 02
Enter watermark text
- 03
Apply and download
No Trenith usage price
Device tools and the Trenith interface are free. External providers may separately charge the account associated with your own API key.
FAQ
Common questions
Is Watermark PDF free to use?
Yes. Watermark PDF is free from Trenith with no account, subscription or artificial usage limit. Practical capacity depends on your device's memory, free storage and browser codec support.
Does Watermark PDF upload my files?
No. Processing happens inside your browser tab on your own device. Source files are not sent to Trenith, and refreshing or closing the tab clears the current queue.
Which formats does Watermark PDF support?
Watermark PDF works with PDF.
How do I use Watermark PDF?
1. Choose a PDF 2. Enter watermark text 3. Apply and download No sign-up is required.
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