Compress BMP
Reduce your BMP file size online for free. BMP files are usually large and uncompressed — this tool makes them dramatically smaller.
Drag & drop images here
or click to browse — multiple files supported (max 25.00 MB each)
Choose FilesNo images yet — drag some in above to get started.
Compress BMP Images Online
BMP is an uncompressed format, so its files are typically very large. Compressing a BMP can shrink it enormously. For the smallest results you may prefer the JPG or PNG pages, but this tool will optimize BMP output directly too.
Compress BMP to an exact size
Use the Size tab to target an exact size. Because BMP has no alpha channel, transparent areas are flattened onto a white background.
Fast & Private
Images are compressed directly on our server — no external APIs, nothing shared with third parties.
Compress to Exact Size
Need a file under 20KB, 50KB, or 100KB? The Size tab hits your target automatically.
Auto-Delete in 10 Min
Uploaded and compressed files are wiped 10 minutes after creation. Nothing is kept permanently.
Batch & ZIP
Compress many images at once and download them together in a single ZIP archive.
Frequently Asked Questions
How do I compress a BMP image?
Drag your BMP file into the box above, choose a compression level on the Slider tab or an exact size on the Size tab, then click Compress and download the result.
Can I compress a BMP to 20KB?
Yes. Open the Size tab, enter 20 in the target field, and the tool will compress (and downscale if needed) your BMP to reach about 20KB.
Are my BMP files kept?
No. Every uploaded and compressed file is automatically deleted 10 minutes after it is created.
Is compressing BMP free?
Yes, completely free with no sign-up and no watermark.