JPG to BMP Converter

1. Upload one or more JPG files (up to 50 MB total).
2. Click 'Convert to BMP' — finishes in under 2 seconds per image.
3. Download BMP files individually, or grab all as a ZIP.

BMP is uncompressed — a JPG photo becomes 10-20x larger as BMP. But BMP is supported by every Windows application since 1990, including legacy industrial, medical, and government software that no longer receives updates.

BMP is one of the oldest image formats still in active use. It stores images uncompressed, which makes files very large but guarantees universal compatibility — even with software released before the year 2000. When you need to open a JPG photo in legacy Windows software, industrial control panels, medical imaging systems, or very old photo editors, BMP is often the only format that works.

The converter decodes the JPG image and writes it as an uncompressed BMP (24-bit or 32-bit). The decoded pixels are preserved at the resolution of the source JPG. The file size grows significantly (typically 10-20x) because BMP does not compress.

• Opening JPG photos in legacy Windows industrial software.
• Inserting JPG images into very old Office documents.
• Converting for medical or government systems that only accept BMP.
• Preparing images for legacy Windows Photo Viewer workflows.
• Archiving images in a format guaranteed to open anywhere.
• Feeding images into old OCR or scanning software.
• Preparing images for legacy print workflows.

BMP output is lossless at the pixel level — the decoded JPG image is written uncompressed, so no additional quality loss occurs beyond what was already in the source. The trade-off is file size: BMP files are 10-20x larger than the source.

• BMP files are 10-20x larger than the source JPG.
• BMP is not a web format — browsers display it inefficiently.
• Large BMP files (50+ MB) may be slow to load in legacy software.
• Email clients often reject BMP attachments over 10-20 MB.
• BMP has no animation support.

• BMP opens natively in every Windows application since 1990.
• Supported by Microsoft Paint, Windows Photo Viewer, and legacy Office.
• Compatible with industrial and government legacy software.
• Opens in GIMP, Photoshop, Affinity, and modern image editors.
• Accepted by every Windows-based CMS and legacy upload form.

• Use BMP only when compatibility demands it — the files are huge.
• For web or email, use JPG or WebP instead.
• For lossless with some compression, use PNG or TIFF instead of BMP.
• Batch-convert up to 50 MB of JPG files at once.
• Modern software doesn't need BMP — use JPG or PNG.

BMP file is enormous

Expected — BMP is uncompressed. A 1 MB JPG becomes 10-20 MB as BMP. Use PNG (lossless, smaller) or JPG for smaller files.

BMP won't upload to a website

Websites typically reject BMP because of file size. Convert to JPG, PNG, or WebP instead.

BMP doesn't open in modern software

This is unusual — every modern image editor supports BMP. Check the file isn't corrupted, or re-convert.

• Microsoft — BMP File Format
• ITU-T T.81 — JPEG specification