BMP to JPG converter
Convert BMP images to JPG in your browser.
Processed in your browser. This file is converted on your device and is never uploaded.
Converter
.bmp, .dib up to 50 MB. You can also drag a file here.
No file selected.
About this tool
BMP turns up in output from older Windows software, scanners, and some scientific instruments. JPEG is understood by every device and program in existence, which makes it the right choice when you do not control what will open the file.
This tool converts BMP to JPG entirely in your browser. The image is decoded, drawn, and re-encoded on your device, so nothing is uploaded and the size of the file costs you no waiting.
Supported formats and limits
- Input
- .bmp, .dib
- Output
- .jpg (image/jpeg)
- Output name
- The original name with the new extension, for example photo.bmp becomes photo.jpg.
- File size limit
- 50 MB
- Processing
- In your browser. The file is not uploaded.
BMP against JPG
| Feature | BMP | JPG |
|---|---|---|
| Compression | None, stored as written | Lossy |
| Colour | 8 bits per channel | 8 bits per channel |
| Transparency | None | None |
| Animation | No | No |
| Keeps EXIF | No | Yes |
| Browser support | Every browser since 1995 | Every browser since 1995 |
| Size of a photograph | 8 to 20 times a JPG | The baseline this row compares against |
| Published | 1990 | 1992 |
When you would want this
The file has to be smaller
A photograph as JPG is roughly 1 to 1 times the size of the same picture as JPG, against 8 to 20 for BMP. On a page that matters twice: less to download, and a faster largest-contentful-paint, which is one of the things a search engine measures. For an email attachment or an upload limit it just matters once.
How to use it
- Choose a .bmp / .dib file, or drag one onto the page.
- Pick a quality level.
- Optionally set a width or height to resize at the same time.
- Select Convert, then download the JPG file.
Limitations
- JPEG is lossy. Detail is discarded during encoding and cannot be recovered, and each further save discards more.
- JPEG cannot store transparency, so transparent areas are filled with the background colour you choose.
- JPEG handles sharp edges badly. Screenshots, logos, and line art develop visible halos; PNG or WebP suit them better.
- Metadata is not preserved. EXIF fields, including camera settings and GPS location, are dropped, which is a privacy benefit but worth knowing if you rely on them.
- Colour profiles are not preserved, so an image in a wide-gamut profile may shift slightly.
- The camera's EXIF orientation is applied, so a photo taken sideways comes out upright rather than rotated.
Other ways to do this
The program already on your computer
Preview on macOS, Photos on Windows, GIMP, Photoshop will open a BMP and save it as JPG, and if you have one of them installed and only one file to convert, that is a perfectly good answer. It stays on your machine the same way this does. Where it stops being convenient is a folder of forty files, or a machine you do not own.
ImageMagick, from a terminal
One command converts a directory: magick mogrify -format JPG *.BMP. If you already have it installed this is the fastest way to do a hundred files, and it scripts. It is also a dependency to install and a syntax to learn, which is a poor trade for converting one image once.
An online converter that uploads
Most sites offering this send your file to a server, convert it there, and give you a link back. They can do formats a browser cannot, which is a real advantage. The cost is that your file was on somebody else's machine, governed by a retention policy you did not read. That is the whole difference here: this page converts BMP to JPG using code your browser already downloaded, so there is no server holding it afterwards.
Frequently asked questions
- Is my image uploaded?
- No. The conversion runs entirely in your browser. The image never leaves your device and no request carrying it is made.
- Which quality should I choose?
- 85% is a good default for photographs and is usually indistinguishable from the original at normal viewing size. Lower settings become visible on sharp edges and in smooth gradients such as skies.
- Will the JPG be bigger or smaller than the BMP?
- Smaller or larger depending on the pair, and here the arithmetic is public: a photograph as BMP runs 8 to 20 times the size of the same picture as JPG, and as JPG it runs 1 to 1. The comparison table above states both, so you can tell before converting rather than after.
- Why is my BMP file so enormous?
- Because BMP barely compresses: it stores each pixel more or less as written, so the size is width times height times bytes per pixel and almost nothing else. That is why it opens instantly and why it is impractical to send. Converting to JPG is the usual fix, and the size drops by a large multiple.
- Can I resize while converting?
- Yes. Set a width, a height, or both. With proportions kept, one dimension is derived from the other, and giving both fits the image inside that box rather than distorting it.
- Do I need to install anything or create an account to use BMP to JPG converter?
- No, to all of it. BMP to JPG converter runs inside the browser you already have, with no sign-up, no download, no watermark on the result, and no cap on how many files you convert. There is nothing to uninstall afterwards either, because nothing was installed.
- Does BMP to JPG converter work offline?
- Once the page has loaded, yes. The conversion runs on your device, so it needs no connection to do the work. The first visit fetches the page and the code that does the converting; after that a lost connection stops nothing, and a converted file appears exactly as it would online.
- How large a file can BMP to JPG converter handle?
- The limit is 50 MB. It is a deliberate one rather than a technical ceiling: the real constraint is memory, and a file that decodes to more than the device can hold fails in a way that is hard to explain. Phones run out well before laptops do, which is why the limit is set where it is.
- Can I convert several files at once with BMP to JPG converter?
- Not here: this tool takes one file at a time, because what it does depends on choices you make about that particular file. Convert them one after another, or look at the batch converters in the same category, which are built for a folder at a time.