Compress Image
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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

  1. Drop your images onto the page, or click to pick them from your device
  2. Use the default settings, or adjust the options for your file type and target result
  3. 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.
Privacy note: This tool runs locally in your browser. Your selected image files are not uploaded to CompressImage.ca. Read more on our promise page.

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.

  • JXL to JPG: Convert JPEG XL files to widely supported JPG
  • JXL to PNG: Convert JPEG XL files to lossless PNG
  • JXL to WebP: Convert JPEG XL files to small WebP images
  • JPG to JXL: Convert JPG photos to next-gen JPEG XL

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.