About this tool
Add a solid border with a custom color and pixel width. Processing uses browser image and canvas APIs, so the selected file stays on the device. The result can be reviewed before downloading.
How to use
- 1Choose a supported JPG, PNG, WebP or GIF image.
- 2Adjust the available setting when the tool provides one.
- 3Create the result, review it and download the PNG.
Benefits
- No image upload to ToolBlur.
- Immediate visual output.
- Transparent PNG output where applicable.
Frequently asked questions
Is the original file changed?+
No. The tool creates a separate downloadable result.
Why is the output PNG?+
PNG provides broad browser support and preserves transparency for rounded corners and favicon assets.