Image watermark

Add watermark to images — text overlay, opacity.

Use Cases

Typical scenarios for Image watermark — see if it fits before you start

Batch JPG/PNG/WebP/SVG to A4 PDF, Image watermark offers fit/fill/original, preserving transparency for portfolios.

Extracting images, Image watermark detects resolution and exports per page with rename.

Scans to printable PDF, Image watermark supports batch and resolution options, ready for print.

Upload — Click or drag PDF/images to the dashed zone. Multi-file and large files (<100MB per batch recommended) are read locally only.
Configure & process — Set pages, angle, password or quality, then hit “Calculate / Process”. Image watermark runs via WebAssembly and pdf-lib in your browser — no server queue.
Preview & download — Check pages, size and thumbnails on the right, then download. Batch jobs download one by one; tweak and re-run if needed.

Page syntax: Use 1,3,5-7 or 1-10,15; empty means all. Out-of-range pages are ignored.
Privacy & size: Everything runs locally — no server upload. For large files, process in batches of 50–100 pages.
Fidelity: Fonts and vectors are preserved where possible. For scanned PDFs, run OCR/searchable PDF first, then convert.

Input

JPGPNGWebPPDF

Output

PDFJPGPNG

All conversions run locally in the browser; check fidelity in desktop for complex layouts.

Will files be uploaded? Is Image watermark safe?

No. Image watermark runs 100% in your browser via File API; no network upload, memory cleared when you close the tab.

Processing failed or download blocked?

Check page ranges, passwords and file integrity. If the browser blocks multiple downloads, allow “automatic downloads” or click links one by one.

How to chain with other image tools?

Combine workflows: organize pages first, then compress/convert for submission, then protect/sign for delivery.

Upload file, process, download.

All calculations run locally in your browser; nothing is uploaded.