0% Server Upload — Protect ID scans and copyright photos inside your browser
Add Custom Text & Tiled Image Watermarks
Protect your photography, e-commerce listings, and sensitive ID scans against unauthorized reuse. Choose center stamp, corner badge, or full diagonal tiled watermarks.
Drag & Drop images to watermark here
Batch watermark JPG, PNG, WEBP 100% locally
100% Browser LocalZero Server UploadBatch ZIP Download
Mark ID cards or official documents with 'For Verification Only' without ever uploading them to an external server.
Single Stamp or Tiled Grid
Place a subtle corner signature or cover the entire photo with a diagonal repeating security pattern.
Custom Opacity, Size & Color
Adjust font size, transparency, color, and angle with instant live preview on your image.
Protecting Your Photos & Documents with Watermarks
Whether you are submitting an ID scan for verification or publishing original product photography online, a watermark prevents unauthorized reuse.
Use Case 1
ID & Document Verification Protection
Overlay semi-transparent 'Submitted for [Purpose] Only - Date' text across ID photos so they cannot be misused elsewhere.
Use Case 2
Photography & E-Commerce Copyright
Batch-apply your brand or store name across dozens of product photos in seconds.
Best Practices for Watermarking
Balance visibility and aesthetics using opacity controls.
Use the Tiled Grid pattern for maximum anti-theft protection
Set opacity between 25% and 40% to keep underlying details legible
Process sensitive documents offline—SafeIMG works without internet once loaded
Frequently Asked Questions
Q. Are my personal photos or ID scans uploaded to any server?
No, never. SafeIMG runs 100% inside your browser's local memory using HTML5 Canvas. Not a single byte of your photos ever leaves your device.
Q. Is it safe to watermark my passport or ID card here?
Yes, 100% safe. Unlike cloud tools, SafeIMG processes your image exclusively inside your local browser memory and never transmits any data.
Q. Is there any file size limit or daily usage cap?
Because there are zero server costs on our end, this tool is 100% free with unlimited usage and no file size limits.
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Technical Whitepaper & User Guide
Image Watermarking & Anti-Theft Protection Guide
Protecting original product photos, blog images, design portfolios, and marketplace listings against unauthorized scraping and fraud is crucial. SafeIMG stamps semi-transparent tiled grids, centered stamps, or corner signatures in 1 second.
1. Defeating AI Erasers via Diagonal Tiling Matrices
Corner watermarks are easily cropped out or erased by AI inpainting tools. SafeIMG offers diagonal full-coverage tiling, applying rotational coordinate math and alpha blending across the entire image so unauthorized reuse becomes practically impossible while retaining subject visibility.
2. Recommended Watermark Settings by Scenario
Protected Asset
Recommended Pattern
Suggested Text & Opacity
Diagonal Tiling or Large Center
Username + Date / 30%-45% opacity to block scammer reuse
Official ID & License Document Copies
Large Center Stamp
"FOR [ORGANIZATION] VERIFICATION ONLY - 2026.11.03" / 35%-50%
