Image Watermark Stamper
Protect your images and photos with custom text or logo watermarks. Adjust transparency, tile repeating, angle, and positioning with full-resolution export.
🔒 Runs in your browser · No upload · No signup
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Frequently Asked Questions
Will watermarking degrade my original photo quality? ↓
No. The watermark is rendered directly onto a high-resolution canvas matching your original image dimensions, ensuring zero pixelation or loss of clarity.
Can I tile a watermark diagonally across the whole photo? ↓
Yes, select the "Repeat / Tile" pattern option. This repeats your watermark in a diagonal security grid across the entire canvas.
Can I upload a PNG logo with transparent background? ↓
Yes! Toggle Watermark Type to "Logo Image" and upload any transparent PNG, WebP, or SVG logo.
Are any files uploaded to an external server? ↓
None. All watermarking processing runs strictly inside your local browser sandbox.