BMP to JPG Converter: Free, Private, No Upload
Convert BMP files to JPG in your browser. Smaller output file, batch up to 20 files at once, no upload, no account, no watermark. Your files never leave your device.
- BMP to JPG
- Batch up to 20 files
- No upload, no account
- Metadata stripped
- 1Add up to 20 images
- 2Pick from 18 formats
- 3Download or copy the code
Processed on your device. Your images are never uploaded, and metadata is stripped. How we keep it private
How do I convert BMP to JPG for free?
Drop your BMP files into the tool above, choose JPG as output, and download the result. Everything runs in your browser, so nothing is uploaded and there is no limit or watermark. It works on Windows, Mac, Linux, ChromeOS, iOS and Android — anywhere you have a modern browser.
- Price
- Free, no credits and no daily cap
- Account required
- No
- File uploaded to server
- No, processed locally in your browser
- Batch limit
- Up to 20 files at once
- Input format
- BMP
- Output format
- JPG
- Best for
- JPG workflows, smaller files, faster sharing
- Works on
- Chrome, Edge, Firefox, Safari, iOS and Android browsers
- Privacy
- No upload, no tracking, metadata stripped
- Output quality
- Adjustable 1-100, defaults to 90
How to convert BMP to JPG
- 1
Drop your BMP files
Drag up to 20 BMP files onto the page or click to choose them. Everything runs in your browser.
- 2
JPG is preselected
Output is already set to JPG. Adjust quality, resize or batch if you want.
- 3
Download
Save each JPG, or download all of them together as a ZIP.
BMP to JPG: what changes and when it makes sense
BMP is a Bitmap image format. It is best known for a simple structure that legacy programs and embedded systems can read without a decoder library. The main drawbacks are enormous files and no reliable transparency.
JPG is a Joint Photographic Experts Group format. It is best known for small files for photographs and near-universal compatibility. The main drawbacks are no transparency, visible blocking at low quality, and quality that drops every re-save.
BMP vs JPG at a glance
| Property | BMP | JPG |
|---|---|---|
| Type | Raster image | Raster image |
| Compression | Usually uncompressed (run-length encoding exists but is rare) | Lossy (DCT based, with chroma subsampling) |
| Transparency | None | None |
| Animation | No | No |
| Colour depth | 1 to 32 bits per pixel | 8 bits per channel (24-bit colour) |
| Support | Opens in browsers and most desktop software, but almost never used on the web | Opens in every browser, operating system, camera, editor and print service |
| History | Created by Microsoft for Windows 1.0 in 1985 as the native bitmap format for the Windows Graphics Device Interface. The "BM" signature has been unchanged since then. Still used in embedded systems and legacy Windows software. | Created in 1992 by the Joint Photographic Experts Group and standardised as ISO/IEC 10918. It became the default image format of the early web because it offered photographic compression when storage was expensive. Still the most widely used photo format 30+ years later. |
What actually changes in this conversion
- Moving from a lossless format to JPG is where you trade fidelity for size. Start high and lower until the difference becomes visible.
- BMP has no alpha channel, so every pixel is already opaque.
- Expect the JPG file to be far smaller than the BMP source.
- EXIF, GPS and camera data are stripped on every conversion. That is good for privacy, but you lose capture dates.
About BMP: history and technical details
Created by Microsoft for Windows 1.0 in 1985 as the native bitmap format for the Windows Graphics Device Interface. The "BM" signature has been unchanged since then. Still used in embedded systems and legacy Windows software.
Technical: File header 14 bytes (signature, size, reserved, offset) followed by DIB header (40+ bytes). Supports 1, 4, 8, 16, 24, 32-bit pixels. Rows padded to 4-byte boundaries. Pixels can be stored bottom-up or top-down. Optional RLE4/RLE8 rarely used.
Real-world size: A 12-megapixel photo is 36 MB as 24-bit BMP. As JPG it is 2-4 MB (90% smaller). A 1920x1080 screen at 32-bit BMP is 8.3 MB; as PNG 200-600 KB.
Popular tools: Windows Paint, IrfanView, XnView, ImageMagick, GIMP, Adobe Photoshop, embedded dev tools.
Alternatives: PNG (lossless, 5-20x smaller), TGA (game pipelines), TIFF (professional print), JPG (lossy, much smaller).
About JPG: what you get
Created in 1992 by the Joint Photographic Experts Group and standardised as ISO/IEC 10918. It became the default image format of the early web because it offered photographic compression when storage was expensive. Still the most widely used photo format 30+ years later.
Technical: 8x8 block Discrete Cosine Transform with 4:2:0 chroma subsampling by default. Baseline supports 8-bit per channel. Progressive loads in waves. Maximum dimensions 65,535 by 65,535 pixels. Maximum 16.7 million colours.
Real-world size: A 12-megapixel photo at quality 85 is typically 2-4 MB. The same photo as PNG is 18-25 MB, as BMP is 36 MB. JPG is 60-80% smaller than PNG for photographs.
Popular tools: Adobe Photoshop, GIMP, Affinity Photo, Lightroom, macOS Preview, Windows Photos, ImageMagick, FFmpeg.
Alternatives: WebP (25-35% smaller), AVIF (30-50% smaller), HEIC (50% smaller, Apple only), PNG (lossless, 5-10x larger).
Browser and software compatibility
BMP: Opens in browsers and most desktop software, but almost never used on the web. JPG: Opens in every browser, operating system, camera, editor and print service.
JPG output opens in virtually every browser, operating system and editor.
Why people move away from BMP
- A 12 megapixel photo saved as 24-bit BMP is roughly 36 MB because pixels are stored almost raw.
- BMP has no practical support for transparency, and almost no web workflow expects it.
Why people choose JPG
- JPG opens everywhere, from email clients to print kiosks to old CMS uploaders.
- Photographs compress very well as JPG, so files stay small enough for email and upload limits.
- Many portals, such as job applications and government forms, accept JPG only.
Common mistakes with BMP
- Using BMP on web pages — files are 10-20x larger than PNG with zero benefit
- Expecting BMP transparency to work — most viewers ignore the alpha channel
- Converting large BMPs without checking disk space — can fill your drive
Best practices for keeping quality
- BMP is raw pixels, so the source has no compression damage. Convert at full size and choose the output quality freely.
- For web use, quality 80-85 is the sweet spot. Below 70, blockiness becomes visible in skies and gradients. For print or archiving, use 90-95.
- JPG has no alpha channel. Transparent areas become a solid colour, so check the edges of cut-out subjects for halos.
- Resize before converting if the image will be shown small. A 4000 pixel photo displayed at 800 pixels wastes bytes in any format.
- Check the result at 100 percent zoom, especially around text, edges and gradients, before you replace any originals.
- Keep your original files. Conversions to a lossy format cannot be undone.
- When you convert a set of images, use the same quality setting for the whole batch. The converter handles up to 20 files at once.
BMP to JPG questions
Quick answers about privacy, quality, supported formats, file limits and how JPG works.
Why convert BMP to JPG?
JPG files are typically smaller than BMP, which makes them faster to share, send and load. The trade-off is a small amount of image detail at low quality settings.
Will converting BMP to JPG lose quality?
At 90% quality, most people cannot tell the difference. Use 85-95% for photos and you are fine.
Does JPG keep transparency?
No. JPG does not support transparency. Transparent areas will be filled with white.
Are my files uploaded?
Never. Everything runs in your browser. Your files never leave your device. Open DevTools Network tab while processing — you will see no upload request.
Can I convert many files at once?
Yes, up to 20 files at once. Download them individually or all together as a ZIP.
Does the converter strip metadata?
Yes. Browsers do not pass EXIF data through a canvas, so GPS, camera model and dates are removed on every conversion. That is good for privacy.
Is it free?
Yes. No credits, no daily cap, no account, no watermark. The practical limit is your device memory.
Is JPG always lossy?
Yes. JPG uses lossy DCT compression exclusively. There is no lossless JPG mode in normal use. Every save throws away some information, though at quality 90+ the loss is invisible to most people.
What does JPG stand for?
Joint Photographic Experts Group — the ISO committee that created the standard in 1992. The file extension is sometimes .jpeg, but both are identical.
Can JPG be animated?
No. JPG is a single-frame format. For animation use GIF, WebP, or MP4 video. Animated JPG variants exist but are not supported by browsers.
Your files never leave your device
No upload, no account, no tracking. Everything happens in your browser using the Canvas API and WebAssembly. You can confirm this in your browser's DevTools Network tab while the tool runs — no request carries your file. See why ToolDeck is different.