Watermark PDF: help & limits

1. Choose a simple, unencrypted PDF.
2. Review the settings and apply the marks.
3. Check the result preview, then download.

Examples

Centers a text mark on each visible page. Basic Latin text only. Watermarks can overlap content and are not copy protection or secure redaction. Existing page text is retained and checked. Signed, interactive or complex PDFs are rejected. Marks are added to all pages.

PDF input and output only. Up to 500 pages total; two-minute processing limit; 100 MiB output limit. Complex documents may fail even within these limits. Review the result before sharing.

Files and outputs stay in browser memory. Processing libraries and fonts load from Reqly; documents are not uploaded. Reset releases file references and cancels work. Downloads remain on your device.

If processing fails, try fewer files or a smaller, unencrypted PDF. The original is unchanged. No server fallback is used.