HEIC to BMP Converter

1. Upload one or more HEIC 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 HEIC photo becomes roughly 30-50x larger as BMP. But BMP is supported by every Windows application since 1990, including legacy industrial 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 HEIC photo in legacy Windows software, industrial control panels, government systems, or very old photo editors, BMP is often the only format that works.

The converter decodes the HEVC-compressed HEIC image and writes it as an uncompressed BMP (24-bit or 32-bit). No lossy re-encoding occurs — the decoded pixels are preserved exactly. The file size grows significantly (typically 30-50x the source HEIC) because BMP does not compress.

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

BMP output is lossless at the pixel level — the decoded HEIC image is written uncompressed, so no additional quality loss occurs beyond what was already in the source. This makes BMP ideal for workflows where quality must be preserved exactly and file size is not a concern.

• BMP files are typically 30-50x larger than the source HEIC.
• BMP is not a web format — no browser displays BMP efficiently.
• Large BMP files (50+ MB) may be slow to load in legacy software.
• Email clients often reject BMP attachments over 10-20 MB.
• Animated HEIC sequences are converted using only the first frame.

• 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.
• 32-bit BMP preserves transparency from HEIC; 24-bit does not.
• For print workflows, TIFF is usually a better choice than BMP.
• Batch-convert up to 50 MB of HEIC files at once.

BMP file is enormous

Expected — BMP is uncompressed. A 3 MB HEIC becomes 100 MB+ as BMP. Use JPG or WebP for smaller files, or TIFF for lossless with some compression.

BMP won't upload to a website

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

BMP transparency doesn't work in older software

Only 32-bit BMP supports alpha. Very old software may only support 24-bit BMP and will display transparency as black. Use PNG if transparency is needed.

• Microsoft — BMP File Format
• ISO/IEC 23008-12:2017 — HEIF