Image Watermark
Overlay custom text or image logos onto your pictures with adjustable opacity, size, and layout grids client-side.
Overlay custom text or copyright logo graphics onto photos offline
Drag & drop your source photo here
supports standard PNG, JPEG, and WebP assets
Processed locally • Images never leave your device
How to use this tool
Offline Asset Protection
Apply copyright identifiers and signatures fully in your local browser canvas. Your high-resolution media elements are protected and never uploaded to external servers.
How to Watermark Images
Add custom text symbols or graphic logos to identify your creations.
Upload Media
Select the background source image you wish to stamp.
Style Overlay
Type text or load a PNG logo, and modify size, transparency, angle, and grid position.
Save Copy
Preview the overlaid results and download the watermarked copy instantly.
Frequently Asked Questions
Watermark options.
What watermark styles are supported?
You can overlay custom text (e.g. copyright symbols, names, websites) or image logos (such as transparent PNG files). You can adjust font styling, grid positioning (center, corners, tiles), rotation angle, and opacity.
Does this prevent all image theft?
While watermarking cannot physically prevent someone from taking a screenshot, it acts as a strong deterrent and ensures your visual brand is baked into the file layers, making it harder for unauthorized re-use.
Privacy & Safety Policy
All tools run completely in your browser via client-side JavaScript. We do not upload your files, interest parameters, or JSON payloads to any server. Your data remains yours.