PDF Toolkit

Image Watermark PDF

Add image watermark to PDF pages — position, scale and opacity control.

Use Cases

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

Image Watermark PDF · Scenario 1

Revising reports without breaking layout, Image Watermark PDF rotates/crops/numbers/watermarks with mm margin control and live preview — WYSIWYG.

Image Watermark PDF · Scenario 2

Adding headers/footers for bids, Image Watermark PDF offers granular position/font/size/start-number for batch delivery.

Image Watermark PDF · Scenario 3

After annotating, Image Watermark PDF keeps font embedding so exports render consistently across readers.

How to Use

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

Tips & Notes

  • 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.

Features

  • Rotate/crop/watermark/pagination
  • Granular page ranges
  • WYSIWYG preview

Supported Formats

Input
PDF
Output
PDF

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

FAQ

Will files be uploaded? Is Image Watermark PDF safe?

No. Image Watermark PDF 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 edit tools?

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

วิธีใช้งาน

Upload file, process, download.

Add Image to PDFInsert images into PDF pages — position, resize and rotate. Add Link to PDFAdd clickable hyperlink to PDF pages — URL annotation. Add Page Numbers to PDFAdd page numbers to PDF — customize position, font, size, margins and start number. Add Text to PDFAdd custom text to any PDF page — choose position, font size and color, local processing. Image to TextExtract text from images — accurate OCR in browser. Images to PDFConvert multiple images to single PDF — batch.
📖How to Add Watermark to PDFAdd text or image watermark to PDF — adjustable font, opacity, rotation, and tiled layout to protect IP.

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