Compress BMP
Reduce BMP file size by resizing, right in your browser.
Drop BMP files here or click to browse
Processing happens on your device. Nothing is uploaded.
100% Private
Files are processed locally in your browser. They never touch our servers.
Smart Defaults
Sensible settings are applied automatically. Fine tune them only if you want to.
Batch Processing
Drop multiple images at once and download everything together as a ZIP.
How to use Compress BMP
- Drop your images onto the page, or click to pick them from your device
- Use the default settings, or adjust the options for your file type and target result
- Download the finished images one by one, or save the full batch as a ZIP
What Compress BMP is for
Use this tool when you need to shrink a BMP but keep the .bmp format. Because BMP is uncompressed, it reduces file size by resizing the image. For a much smaller file at full resolution, convert to PNG instead.
- Shrink a BMP by reducing its dimensions while keeping the .bmp format.
- Make an oversized bitmap small enough to store or send.
- Resize a batch of BMP files to a sensible maximum width.
- Decide between a smaller BMP and a much smaller PNG or JPG.
Best practices for better results
Image optimization works best when you choose the right balance between file size, visual quality, dimensions, format compatibility and privacy. These tips help you get a cleaner result.
- Reducing dimensions is the only way to shrink a file that stays a BMP.
- For a far smaller file at full size, convert to PNG (lossless) instead.
- Pick a max width that matches where the image will actually be shown.
- Keep the original BMP if you might need the full-resolution version later.
What happens to your images?
When you choose a file, your browser reads it locally and creates the processed version on your own device. CompressImage.ca does not receive the original image or the finished file.
That local-first approach is useful for personal photos, client work, screenshots, documents, product images and other files you do not want to upload to a third-party server.
When to use another tool
The best tool depends on what you are trying to fix. Compression reduces file size, resizing changes dimensions, conversion changes format, cropping changes framing, and metadata removal cleans hidden information from the file.
| Goal | Best tool |
|---|---|
| Make a file smaller | Compress Image |
| Hit an exact file size | Compress Image to Size |
| Change image dimensions | Resize Image |
| Create WebP files for websites | Convert to WebP |
| Convert iPhone photos | HEIC to JPG |
| Remove hidden photo data | Remove EXIF |
Related image tools
These tools solve similar image optimization problems and work the same way: locally in your browser, with no required upload.
- JFIF to JPG: Rename JFIF photos to standard JPG files
- JPEG to JPG: Save JPEG files with the standard .jpg extension
- SVG to JPG: Rasterise SVG vector files into JPG images
- GIF to JPG: Save the first frame of a GIF as a JPG
Compress BMP FAQ
How do I compress a BMP file?
Set a maximum width to reduce the dimensions, then download the smaller BMP. For a much bigger reduction, convert it to PNG or JPG instead.
Why can a BMP only be shrunk by resizing?
BMP is uncompressed, so the only way to make a smaller BMP is fewer pixels. Converting to PNG or JPG uses real compression for far smaller files.
Will compressing reduce quality?
Reducing dimensions lowers resolution but keeps the BMP lossless at the new size. To keep full size and shrink the file, convert to PNG instead.
Is my file uploaded?
No. The BMP is decoded, resized and rewritten entirely in your browser, so your file never leaves your device.