How to use this image tool
- Choose the source image.
- Set the available options for the output.
- Select “Add transparent padding” and inspect the result.
- Download the newly generated file.
#110 · Background & Transparency Tool
Add Transparent Padding
Expand the canvas around an image with truly transparent pixels. Set each side separately and download a new PNG with its alpha channel intact.
Image Tool
Single imagepx
px
px
px
Ad space
What this tool does
A larger transparent canvas is created and exported as PNG, retaining alpha in the added area.
Processing stays in the current browser tab. Closing or resetting the page releases temporary preview URLs.
Supported formats and limits
The file picker accepts the formats shown above. Actual decoding support is controlled by the browser. Images above 60 megapixels are blocked to reduce memory crashes, and canvas-generated output does not retain source metadata.
| Stage | Behavior |
|---|---|
| Input | Browser-decoded image files |
| Processing | Local Canvas, File, and Blob APIs |
| Output | New downloadable result |
Tips for better results
- Start from the highest-quality practical source.
- Check small text and edges at full preview size.
- Keep a copy of the original because browser exports may remove metadata.
- For large batches, process fewer files at a time on mobile devices.
FAQ
Does Add Transparent Padding upload my image?
No. Processing runs in your browser. The page does not send the selected image to a processing server.
Which image formats work with Add Transparent Padding?
The tool accepts the formats listed on the page, but decoding still depends on your browser. AVIF and some unusual files may not open in older browsers.
Will image metadata be preserved?
Canvas-generated image outputs normally omit EXIF and other source metadata. The batch rename tool copies original bytes, while its ZIP changes filenames only.
What happens with very large images?
The tool rejects images above its pixel safety limit because large canvases can exhaust memory, especially on phones. Resize the source first if needed.
Can I use the downloaded result immediately?
Yes. The download is a newly generated image or report. Check the preview and dimensions before publishing or archiving it.
Related image tools
Local processing checklist
| Upload required | No |
| New result Blob | Yes |
| Reset cleanup | Yes |