Convert JPG to BMP Online Free
Uncompressed pixel-perfect quality. Native Windows compatibility.
ToFormat — free online converter
Upload your files
Max file size: 30MB · Up to 20 files at once
Why ToFormat?
Zero-Compression Quality
BMP stores every pixel exactly as decoded — no compression artifacts, no quality compromises. What you see is byte-for-byte what's stored on disk.
Native Windows Format
BMP is Windows' built-in image format since 1985. It opens instantly in Paint, Photo Viewer, and every Windows application — no codecs or plugins needed.
Fast & Private
Files are processed on secure servers and automatically deleted within 10 minutes. No registration, no watermarks.
About the Formats
📸 What is JPG (JPEG)?
JPG is the web's dominant photo format, using lossy DCT compression to balance quality and file size. Efficient for sharing, but each save cycle introduces cumulative artifacts — especially visible around sharp edges, text, and flat-color areas.
All JPG conversion tools →🖼️ What is BMP?
BMP (Bitmap) is one of the oldest image formats, introduced with Windows 1.0 in 1985. It stores raw pixel data — typically 3 bytes per pixel (BGR) — preceded by a simple header. No compression, no complexity. BMP is natively supported by every Windows version, making it the go-to choice for legacy systems, embedded devices, and hardware that reads raw pixel arrays.
All BMP conversion tools →How to Convert
Upload your JPG
Click the upload area or drag and drop. Batch upload up to 20 files at once.
Click Convert
Press the Convert button. The conversion takes just a few seconds per file.
Download BMP
Your uncompressed BMP is ready. Download within 10 minutes before auto-deletion.
When to Convert JPG to BMP
🖥️ Legacy Software
Older Windows applications, industrial SCADA systems, and enterprise tools built in the 1990s–2000s often require BMP input. Converting JPG to BMP guarantees compatibility where modern formats aren't supported.
💡 Modern lossless: try JPG to PNG →🔬 Scientific & Medical Imaging
Lab equipment, microscope software, and research pipelines that process pixel data directly often require uncompressed input. BMP delivers raw pixel arrays with zero decoding overhead.
💡 Professional archival: try JPG to TIFF →🖨️ Hardware & Engravers
Thermal label printers, laser engravers, CNC machines, and LED matrix displays frequently accept only BMP. Convert your designs for direct device compatibility.
💡 Offset printing: try JPG to TIFF →🎮 Game Dev & Textures
Some game engines, sprite editors, and asset pipelines prefer uncompressed BMP to guarantee no compression artifacts sneak into source textures during import.
💡 Lighter lossless: try JPG to PNG →Format Comparison
| Format | JPG | BMP |
|---|---|---|
| Compression | Lossy | Lossless |
| Transparency | No | No |
| File Size | Smaller | Larger |
BMP files are very large (uncompressed). For lossless quality at 50–70% smaller sizes, use JPG to PNG. For web delivery, try JPG to WebP or JPG to AVIF.
💡 Pro Tips
- BMP files are uncompressed and large — a 1 MP image is ~3 MB, a 12 MP photo is ~36 MB. Convert only when your workflow specifically demands BMP.
- BMP does not support transparency. 32-bit BMP with alpha exists but has inconsistent software support. For reliable transparency, use PNG or WebP.
- Converting JPG to BMP does not improve quality. The BMP preserves exactly what was in the JPG — existing compression artifacts remain. No detail is recovered or added.
- If your target system also accepts PNG, prefer it — PNG provides identical lossless quality at 50–70% smaller file sizes through deflate compression.
- Embedded systems and microcontrollers (Arduino, STM32, ESP32) often read BMP because the format is trivially simple: a fixed header followed by raw pixel rows. No decompression library required.
- For Windows Paint editing, BMP is the native format — but modern Paint also handles PNG and JPG natively. BMP is only essential for very old Windows applications (pre-XP era).
- BMP stores pixels in BGR order (blue-green-red), not RGB. If you're processing BMP programmatically, account for this byte order to avoid color channel swaps.
How JPG to BMP Conversion Works
BMP is the simplest mainstream image format in existence. It stores raw pixel data — typically 3 bytes per pixel in blue-green-red order — preceded by a 54-byte header that describes width, height, and color depth. There is no compression algorithm, no optimization pass, and no complexity.
When you convert JPG to BMP, our tool fully decodes the JPG's DCT-compressed blocks and writes the resulting pixels directly into BMP's uncompressed structure. Every pixel decoded from the JPG is stored byte-for-byte as-is. The result is a faithful, uncompressed snapshot of your image — but at a significantly larger file size, since the 10:1–20:1 compression ratio of JPG disappears entirely.
The conversion is lossless relative to the JPG source: no additional quality loss occurs. However, artifacts already present in the JPG (blockiness, banding) are preserved in the BMP output.
JPG vs BMP: When Raw Pixels Matter
JPG achieves small file sizes through lossy DCT compression — typically 10:1 to 20:1 ratios. A 12 MP photo that would be ~36 MB uncompressed becomes 2–4 MB in JPG. The trade-off is permanent, cumulative quality loss with each re-save.
BMP applies zero compression. A 1920×1080 image at 24-bit color is always exactly 5.93 MB regardless of image content — a sunset and a blank white canvas take the same space. This makes BMP predictable for systems that need to pre-allocate memory or process fixed-size buffers.
For lossless quality with reasonable file sizes, PNG is nearly always better than BMP — it uses deflate compression to achieve 50–70% smaller files with zero quality loss. For archival and professional printing, TIFF offers lossless compression with metadata, layers, and color profiles.
Where BMP Remains Essential in 2025
BMP has been superseded by PNG, WebP, and TIFF for mainstream use — but it thrives in specific niches where simplicity is a feature, not a limitation.
Embedded systems — Arduino, Raspberry Pi, industrial PLCs, and medical devices parse BMP with minimal code and no external libraries. The format's fixed structure means a microcontroller can read pixel data with a simple pointer offset. Legacy enterprise software — corporate applications from the 1990s–2000s, SCADA industrial control, and older ERP image modules often require BMP. Hardware interfaces — thermal printers (Zebra, Brother), laser engravers, CNC routers, and LED matrix controllers frequently accept only BMP or raw bitmap data.
If your use case doesn't fall into these categories, PNG gives you lossless quality at a fraction of the file size.