ConvertWhat happens when you convert Sketch to BMP
- Sketch files are converted from the preview image saved inside the file (the first page, up to about 2000 px), not re-rendered.
- Both formats are lossless, so every pixel is kept exactly.
- BMP has no transparency, so transparent areas are filled with a background color you choose (white by default).
Sketch vs BMP
| Feature | Sketch | BMP |
|---|---|---|
| Compression | Vector | None (uncompressed) |
| Transparency | Yes | No |
| Animation | No | No |
| Colors | 16.7M | 16.7M |
| Best for | UI design | Legacy Windows software |
How to convert Sketch to BMP
- Drop your Sketch files on the box above, or click it to choose files. You can add many at once.
- Adjust the options if you want. The defaults work well for most files.
- Click Download for each BMP file, or "Download all" to get a ZIP.
Frequently asked questions
Is it safe to convert my files here?
Yes. Conversion happens entirely in your browser. Your files are never uploaded to a server, so nobody else can see them.
Is it free? Are there limits?
It's completely free, with no sign-up, watermarks or daily limits. The only limit is your device's memory for very large files.
Can I convert many Sketch files at once?
Yes. Drop as many files as you like; they're converted one after another and you can download them all as a ZIP.
Will converting Sketch to BMP reduce quality?
No. Both formats are lossless, so every pixel is kept.
Does BMP keep transparency?
BMP doesn't support transparency, so transparent areas are filled with a background color you can choose.
Are layers kept?
No. The file is flattened into a single image, exactly as it looks. Keep the original if you still need the layers.
Why is my Sketch image smaller than the design?
Sketch saves a preview image inside every file, and that preview is what gets converted. For full-size or per-artboard exports, export from the app itself.