What is a BMP Compressor?
BMP (bitmap) is an uncompressed image format — every pixel is stored raw, which makes BMP files far larger than an equivalent JPEG or PNG for the same photo. Since BMP itself has no real "quality" setting to compress, our BMP compressor re-encodes your bitmap as a JPEG at your chosen quality — the standard, most effective way to shrink a BMP down to a reasonable size.
How to Compress a BMP Online — Step by Step
- Upload your BMP files. Drag and drop one or more .bmp files into the box above.
- Adjust the quality slider. The estimated JPEG size updates live as you move it.
- Compress and download. Click "Compress" and download individually or as a ZIP.
Why Use Our BMP Compressor?
- Dramatic size reduction — BMP has no compression to begin with.
- Batch support for up to 20 BMP files at once.
- Private — files are automatically deleted within 2 hours.
- Free, with no signup required.
Frequently Asked Questions
Why does this output a JPEG instead of a smaller BMP?▾
BMP is an uncompressed format by definition — a "compressed BMP" isn't really a standard thing. Converting to JPEG is the effective, standard way to shrink a bitmap image significantly.
How much smaller will the result be?▾
Often dramatically smaller — BMP files can be 5-10x (or more) larger than a JPEG of the same photo at good quality.
Related Tools
- Compress Image — Reduce image file size without losing quality.
- Compress JPG — Shrink JPG file size online.
- Compress PNG — Shrink PNG file size online.
- Compress JPEG — Shrink JPEG file size online.
- Compress WEBP — Shrink WEBP file size online.
- Compress HEIC — Shrink HEIC file size online.