ICO to BMP, explained
Convert ICO to BMP directly on your device. Create a 24-bit BMP bitmap for software that specifically requires BMP input. Inspect the preview dimensions and transparent edges. Converting a small decoded icon does not restore a larger source image or add lost detail.
Choose ICO files and confirm the preview.
Keep BMP selected. Review the output behavior below before converting.
Convert and download the BMP results. Multiple results can be saved together as a ZIP.
Reading your ICO source
ICO files may contain multiple icon representations. The browser chooses a representation to decode; this tool does not expose a picker for every embedded size or export every icon entry.
Settings for BMP output
BMP export is uncompressed 24-bit RGB, without a quality slider. Transparent areas use your chosen background (white by default); change it in Advanced Settings. Expect substantially larger files than compressed photo formats.
Dimensions in ICO to BMP
Original size keeps decoded raster dimensions. Advanced Settings offers percentage scaling or fit within a maximum width and height, with aspect ratio preserved and no cropping. Input and output safety limits both apply.
What survives the conversion
The output stores decoded RGB pixels without JPEG-style compression. It does not preserve source alpha, layers, vector data or original high-bit-depth samples. Inspect the preview dimensions and transparent edges. Converting a small decoded icon does not restore a larger source image or add lost detail.
Batch processing and device limits
Choose up to 50 files, each at most 64 MB. Decoded images must fit 24 megapixels and 16,384 pixels per side; total outputs are capped at 256 MB. All conversion runs on this device. Source metadata is removed, and damaged or unsupported variants can fail without changing the originals.