Is this tool really free?

Yes, all our PDF tools are completely free to use with no hidden costs, subscriptions, or per-file charges. We support the service through non-intrusive advertising, not by charging for basic document operations. You can use any tool as many times as you like, with no daily limits, file size restrictions, or account requirements whatsoever.

Absolutely. All PDF processing happens directly in your browser using local JavaScript and WebAssembly libraries. Your files are never uploaded to any server, never stored in the cloud, and never transmitted over the internet. The files remain entirely on your device from start to finish, giving you complete control over your sensitive and confidential documents.

What image formats can I use as stamps?

You can use PNG, JPEG, and SVG images as stamps. PNG is recommended for stamps with transparent backgrounds, such as approval seals, logos, or graphic marks that should blend naturally with the page. JPEG works for photographic stamp images. SVG stamps scale perfectly to any size without quality loss and produce the sharpest result at all sizes.

Can I stamp specific pages only?

Yes, you can apply the stamp to all pages or restrict it to specific pages by entering a page range. This is useful for stamping only the first page with a cover stamp, applying a footer stamp to all pages except the cover, or marking only the pages of a specific section with a chapter identifier stamp.

What is the difference between Stamp and Watermark?

Stamps and watermarks serve similar purposes but differ in typical usage. A stamp is usually an image (logo, seal, or graphic) placed in a specific location like a corner. A watermark is typically a large, often semi-transparent text or image overlaid diagonally across the entire page. The Watermark tool is optimized for full-page diagonal text overlays, while Stamp is better for positioned image marks.

Can I resize the stamp?

Yes, you can scale the stamp to any size relative to the page. You can set a specific width or height and the stamp is proportionally scaled. Drag handles in the preview allow interactive resizing. For logos and seals, a stamp sized at 10-20% of the page width typically looks professional without being too prominent.

Can I make the stamp semi-transparent?

Yes, the opacity of the stamp can be adjusted from fully opaque (100%) to fully transparent (0%). An opacity of 30-60% creates a semi-transparent stamp that is visible but allows the underlying content to show through. For background watermark-style stamps, lower opacity values work well. For official seals or approval marks, full opacity is typically more appropriate.

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