BMP to JPEG — Compress Large Bitmap Files Efficiently
Convert BMP to JPEG for 90%+ file size reduction. Create lightweight files suitable for email and cloud uploads.
Drop BMP files here or click to select
.bmp (multiple files)
Settings
Files
Converting...
Preparing...
Format comparison
BMP (Bitmap) is a Windows standard uncompressed format, simple but with large file sizes.
Pros
- ✓ Simple structure
- ✓ Wide compatibility
Cons
- ✗ No compression
- ✗ Huge file sizes
JPEG (Joint Photographic Experts Group) is the most widely used image format, ideal for photographs and images with gradients.
Pros
- ✓ Universal compatibility
- ✓ Adjustable compression
- ✓ Great for photos
Cons
- ✗ Lossy compression degrades quality
- ✗ No transparency support
When to Convert BMP to JPEG
Convert BMP to JPEG to shrink files for sharing. Works well for photos and images with gradients.
Technical Format Details
BMP Technical Specifications
Technical details
BMP is a simple raster format often seen in older Windows workflows. Many BMPs are uncompressed, which makes files unnecessarily large for modern use.
Good for
- Legacy compatibility: Working with older tools- Temporary data: When you want an uncompressed intermediate
Notes
- File size: Not ideal for the web. Converting to PNG/JPEG usually makes it much easier to handle- Transparency: BMP transparency behavior can be inconsistent across environments
Reference: Microsoft: BMP Format Overview
JPEG Technical Specifications
Technical details
JPEG is a lossy format optimized for photos. Lower quality settings reduce file size, but can introduce artifacts around edges and text.
Good for
- Photos: Natural images with gradients- Sharing: Maximum compatibility
Notes
- Re-encoding: Repeated saves accumulate artifacts (use PNG for editing intermediates)- Transparency: Not supported
Reference: JPEG Committee
How to Use
Add files
Drop or click to select your BMP files (multiple supported)
Confirm output
Default is JPEG. You can change to another supported output format if needed.
Adjust options
Set quality, resize, and metadata options only if you need them.
Convert & download
Download each file, or download everything as a ZIP for batch outputs.
FAQ
How much compression does BMP to JPEG achieve?
Photo-like images can shrink 95%+. Even text or illustration-heavy images typically see 80%+ reduction.
Is transparency preserved?
BMPs typically have no transparency, and JPEG doesn't support it either — so transparency isn't a concern here.
What quality setting is recommended?
Since BMPs are lossless, JPEG quality 85–90 produces clean results. For size priority, going down to 75 is still practical.
Can I keep Exif metadata?
When "Keep Exif/Metadata" is ON, we try to carry over things like capture time, camera info, and GPS where possible. Some tags may be dropped depending on the input, output format, and browser environment. Turn it OFF if you want to remove location data before sharing.
Can I convert multiple files at once?
Yes. You can select multiple files, convert them in one run, and download each file individually. For multiple outputs, you can also download everything as a ZIP. For very large batches, splitting into smaller runs is more stable.
Are my images uploaded to a server?
No. Conversion runs locally in your browser, and your images are not sent to an external server.
What if conversion fails or is slow?
Some formats (like HEIC/HEIF) depend on browser support. If it fails, try another browser, reduce the number of files, or resize before converting.
Why do colors sometimes shift after conversion?
Differences in decoding/encoding and color handling can cause small shifts. For critical images, compare the output against the original.
References
- Microsoft: BMP Format Overview
Official BMP structure and compatibility notes.
- W3C: PNG 3rd Edition
Official PNG/APNG specification reference.
- AOM: AVIF Specification
Normative AVIF container and coding behavior.
- JPEG Committee
Primary standards source for JPEG and JPEG XL.
- Google Developers: WebP
Reference for WebP encoding and support behavior.
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