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BMP

BMP — Bitmap Image File

Image

BMP files are typically uncompressed, making them enormous compared to other formats. Compressing a BMP by re-encoding it with lossless compression can reduce its size by 50–90%, making it practical to share or store images that were previously too large for email or online upload.

up to 90%Powered by Pillow.bmp

✓Common use cases

  • ›Shrinking large BMP screenshots for online sharing
  • ›Reducing BMP assets before importing into video projects
  • ›Compressing BMP wallpapers and system graphics for smaller footprints
  • ›Optimizing BMP files created by legacy imaging software

★Advantages

  • ›Massive size reduction (50–90%) from an otherwise uncompressed baseline
  • ›No visible quality change since most compression applied is lossless
  • ›Makes BMP files practical for sharing via email or cloud storage
  • ›Preserves full RGB color fidelity through the compression process

⚙Technical details

Standard BMP stores raw pixel data with minimal or no compression (RLE for 4-bit and 8-bit indexed only). Compression re-encodes the raw pixel grid using deflate or RLE, achieving large size reductions since raw raster data compresses very efficiently.

Compress your BMP file

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.bmp

Max file size: 100 MB · Your file is processed securely and deleted after compression.

Frequently asked questions

Does compressing BMP reduce quality?

For image compression, quality depends on the setting you choose. At 75–85% quality the difference is barely perceptible. For lossless formats like PNG, compression is entirely lossless — no pixel data is discarded.

How much can I reduce a BMP file?

BMP files can typically be reduced by up to 90% depending on the source content and the compression level you select. Files with lots of detail compress less than simpler content.

Is my BMP file safe when I compress it?

Yes. Your file is uploaded over an encrypted HTTPS connection, processed on our secure servers, and permanently deleted immediately after you download the compressed output. We never store or share your files.

What tool is used to compress BMP files?

We use Pillow — a battle-tested, open-source compression engine trusted by developers worldwide — to process BMP files reliably and efficiently.