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Free Online PDF Stamp Tool - ATools

Free online PDF stamp and seal tool: Upload PDF and transparent stamp images, drag, scale, and rotate stamps visually, and export stamped PDF files.

View source on GitHub

Free online PDF stamp and seal tool. Place electronic stamps, company seals, and signatures onto PDF documents with precise drag-and-drop, resizing, and rotation. 100% client-side processing with zero file uploads to protect sensitive documents and privacy. Completely free with no watermark.

Step 1

Drag & drop or click to upload / replace PDF

Step 2

Transparent PNG recommended; supports drag & drop

Step 3

Step 4

0 / 0

Upload a PDF file to begin

Waiting for file upload