BMP to JPG Converter
Convert BMP to JPG instantly — shrink huge bitmap files to compact JPEG, free, 100% in your browser
Drop image here or click to upload
BMP — max 20MB
You can also paste an image (Ctrl+V)
Why Convert BMP to JPG?
BMP (Bitmap) is an uncompressed image format developed by Microsoft for Windows. Every pixel is stored in full — no compression, no quality loss, no tricks. The result is a format that is perfectly accurate but impractically large. A single 1920×1080 photograph stored as BMP takes approximately 6MB. The same photograph as a JPG at high quality takes 100–300KB.
Converting BMP to JPG compresses the image using JPEG's DCT (Discrete Cosine Transform) algorithm, which removes detail that the human eye is least likely to notice. At 85–92% quality, the output is visually indistinguishable from the original while being 10 to 20 times smaller.
Beyond file size, BMP has poor platform support. Most image hosting sites, email providers, social media platforms, and web browsers either refuse BMP uploads or display them incorrectly on non-Windows devices. JPG is universally supported across every platform, browser, device, and operating system.
What Is a BMP File?
BMP stands for Bitmap Image File. Microsoft introduced the format in the 1980s as the native raster format for Windows. BMP stores pixel data row by row, with each pixel represented as a fixed number of bits (typically 24 bits for full color or 32 bits with an alpha channel). No compression is applied by default.
BMP files are common outputs from Windows Paint, certain scanners, and legacy graphics software. They also appear as screenshots on older Windows systems. While BMP is lossless — every pixel is preserved — the file size makes it unsuitable for sharing, uploading, or using on the web. Converting to JPG is the standard approach for reducing BMP files to a shareable size.
BMP vs JPG — Format Comparison
| Property | BMP | JPG |
|---|---|---|
| Colors | 16.7 million (24-bit) | 16.7 million (24-bit) |
| Compression | None (uncompressed) | Lossy (DCT) |
| Typical file size | ~6MB for 1920×1080 | ~150–300KB for 1920×1080 |
| Transparency | Limited (32-bit BMP only) | Not supported |
| Web support | Limited — Chrome only | Universal |
| Email support | Poor — often blocked | Universal |
| Platform support | Windows mainly | All platforms |
| Best for | Windows native apps | Photos, sharing, web |
Common Use Cases for BMP to JPG
- Windows Paint files — Paint saves images as BMP by default. Converting to JPG makes the image shareable via email, social media, and messaging apps without changing the visual content.
- Scanner output — Many flatbed scanners and all-in-one printers default to BMP output. Converting scanned documents and photos to JPG produces dramatically smaller files with no visible quality difference.
- Email attachments — Most email providers block or flag BMP attachments as unusual. Converting to JPG ensures the image arrives correctly and does not hit size limits.
- Web and social media uploads — Web platforms either reject BMP files or silently re-compress them. Converting to JPG before uploading gives you control over quality and file size.
- Legacy graphics and game assets — Older games and software store textures and assets as BMP. Converting to JPG modernizes these assets for use in current tools and workflows.
- Storage and archiving — A folder of BMP screenshots or images can take up gigabytes. Converting to JPG reduces storage requirements by 90%+ without visible quality loss.
How BMP to JPG Conversion Works
This tool converts BMP to JPG entirely in your browser using the HTML5 Canvas API. The BMP file is loaded into a browser image element, drawn onto an off-screen canvas at full pixel dimensions, and exported as a JPEG at 92% quality. No file is ever sent to a server.
Because BMP stores pixels uncompressed, the browser can read BMP data directly without any decoding step. The JPEG export at 92% quality preserves full visual fidelity for photographs and complex images while reducing file size by 90–97%. For images with text or sharp edges where lossless output is needed, consider converting to PNG instead.
File Size: BMP vs JPG
The size reduction when converting BMP to JPG is typically dramatic:
Full HD photo (1920×1080)
BMP: ~6MB → JPG: ~150–300KB. File size reduced by 95%+. Visually identical at 92% JPEG quality.
Small graphic (640×480)
BMP: ~900KB → JPG: ~40–80KB. Over 90% smaller. Ideal for email and messaging attachments.
4K image (3840×2160)
BMP: ~24MB → JPG: ~500KB–1.5MB. Makes ultra-high-res photos shareable without losing visible detail.
If the JPG file is still larger than you need, use the Compress Image tool to reduce it further to a specific target size such as 100KB or 200KB.
BMP to JPG vs BMP to PNG
Both JPG and PNG are far better choices than BMP for sharing and web use, but they serve different purposes:
- Choose JPG when file size matters — for photographs, email attachments, social media uploads, and web publishing. JPG produces the smallest file size for photographic content.
- Choose PNG when lossless quality is required — for screenshots with text, logos, diagrams, and images you plan to edit further. PNG compresses without any quality loss, though files are larger than JPG.