Convert BMP to JPG free in your browser. Batch convert, set the quality and download instantly. Your images are never uploaded.
Add your BMP files, adjust the settings and download JPG files. Everything runs in your browser, so your images are never uploaded.
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To convert BMP to JPG online, add your BMP files above, choose a quality (90 suits most images), press Convert and download the JPG files. BMP files are usually uncompressed, so JPG versions are typically dramatically smaller. Nothing is uploaded; conversion runs in your browser.
Convert bulky BMP files to compact JPG images that are easy to email, upload and store. BMP is usually uncompressed, so the savings are typically very large. It is a free tool from Websolindia, a New Delhi website design and SEO company that builds fast, image-optimised websites.
Unlike most online converters, this tool does not upload your images. Your browser decodes each BMP file, converts it and creates the JPG file on your own device. That keeps private photos private, avoids upload waits and keeps working on a slow connection once the page has loaded. You can convert up to 50 files at a time and download them one by one or together as a ZIP.
Working with BMP files more often? Our BMP to PNG Converter Online is another quick option. You may also like the PNG to JPG Converter Online, or browse every tool in the Websolindia image converter collection. Smaller images load faster; you can measure the effect with our Website Performance Analyzer.
This table compares the two formats so you can decide whether converting is the right move.
| Feature | BMP | JPG |
|---|---|---|
| Full name | BMP (Windows Bitmap) | JPEG (Joint Photographic Experts Group) |
| Origin | Microsoft's Windows bitmap format | Standardised in 1992 |
| Compression | Usually none (uncompressed) | Lossy |
| Transparency | Only in some 32-bit variants | No transparency |
| Animation | No | No |
| Colour depth | 1 to 32 bits per pixel | 8 bits per channel (24-bit colour) |
| Typical file size | Very large | Small for photographs |
| Best for | Legacy Windows software and raw scans | Photographs and images with many colours |
| Browser support | Browsers can show it, but it is rarely used on the web | Every browser, app and device |
| File extension | .bmp, .dib | .jpg, .jpeg |
File size: JPG files are usually dramatically smaller than uncompressed BMP files.
This is exactly what happens to your file. Nothing is hidden, and you can verify that nothing is uploaded by watching your browser's network tab while you convert.
| Step | What happens |
|---|---|
| 1. Read the file locally | Your browser reads the file from your device into memory. Nothing is sent to a server. |
| 2. Identify the format | We check the file's first bytes (its signature) instead of trusting the extension, so a PNG renamed to .jpg is still handled correctly. |
| 3. Decode the BMP to pixels | The image is decoded to raw red, green, blue and alpha pixels using your browser's built-in BMP decoder. |
| 4. Resize (optional) | If you set a maximum width, larger images are scaled down with an area-weighted filter. Images are never enlarged, and the proportions are always kept. |
| 5. Flatten transparency | JPG cannot store transparency, so each pixel is blended with your chosen background colour: result = colour × α + background × (1 − α) for every channel, where α runs from 0 (transparent) to 1 (opaque). |
| 6. Encode the JPG | The pixels are written out as JPG using your browser's JPEG encoder, using the quality you set. Metadata such as camera details and location is not copied. |
| 7. Report the result | We show the dimensions, the sizes before and after, and the change: (new size − original size) ÷ original size × 100. For example, 500 KB becoming 350 KB is −30%. |
| Setting | Default | Range | What it does |
|---|---|---|---|
| Quality | 90 | 1–100 | Higher gives a sharper, larger JPG. 85–92 suits most photos. |
| Background colour | White | Any colour | Fills transparent areas, since JPG cannot store transparency. |
| Maximum width | None | 1–20,000 px | Scales larger images down. Never enlarges. |
| What | Formula | Notes |
|---|---|---|
| Size change | (new − original) ÷ original × 100 | Shown for every file. Negative means smaller. |
| Transparency | colour × α + background × (1 − α) | Per colour channel; α from 0 to 1. |
| Downscale factor | min(1, maximum width ÷ width) | Applied only when you set a maximum width; never above 1. |
| Quality | Passed to the encoder as a number from 1 to 100 | The scale is encoder-specific, so the same number gives different results in different formats. |
Speed depends on your device and the image size. In our Chrome tests on a desktop-class processor, a 6-megapixel photograph took about 2 seconds to convert to WebP or PNG. AVIF is the slowest: about 2.5 seconds on Fast and about 7.5 seconds on Balanced. Phones and older laptops take longer, and images over about 120 megapixels are declined rather than risking a frozen browser.
| Format | Where it opens | Typical use |
|---|---|---|
| BMP | Browsers can show it, but it is rarely used on the web | Legacy Windows software and raw scans |
| JPG | Every browser, app and device | Photographs and images with many colours |
| This converter | Current Chrome, Edge, Firefox and Safari. Needs JavaScript | Private conversion on your own device |
BMP normally stores every pixel without compression, so the file size is roughly width × height × bytes per pixel. Converting to JPG compresses it.
BMP files are generally uncompressed, so JPG versions are typically dramatically smaller. The result row shows the exact saving.
A little, since JPG is lossy, but at quality 90 or above it is rarely visible for photographs. For a lossless result use the BMP to PNG Converter Online.
Yes. Add up to 50 files and press Convert, then download them one by one or all together as a ZIP.
Yes, unless you set a maximum width, which only scales larger images down.
Mostly in legacy Windows software and some embedded systems. For the web, JPG, PNG, WebP and AVIF are far better choices.
Yes. It is free, needs no sign-up, adds no watermark and has no daily limit. You can convert up to 50 BMP files in one go. It is provided by Websolindia.
No. Your BMP files are read and converted inside your browser, on your own device. They are never sent to Websolindia or anyone else, which is why this converter is safe for private photos and documents.
Yes. The new file is created from the decoded pixels, so camera details, GPS location and other embedded metadata are not copied. If you need to keep metadata, use a desktop editor.
Up to 50 files per batch and 150 MB per file. Images above roughly 120 megapixels are declined with a clear message rather than freezing your browser.
Current versions of Chrome, Edge, Firefox and Safari.
Websolindia built it. We are a New Delhi website design, SEO and digital marketing company serving businesses since 2014. We also build fast websites with properly optimised images; see our website designing and SEO services.
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