JPG to BMP converter
Convert JPG images to BMP in your browser.
Processed in your browser. This file is converted on your device and is never uploaded.
Converter
.jpg, .jpeg, .jfif, .pjpeg, .pjp up to 50 MB. You can also drag a file here.
No file selected.
About this tool
JPEG is what cameras and phones produce, and what most photographs arrive as. BMP is uncompressed and trivially simple, which is occasionally what a piece of legacy software insists on.
This tool converts JPG to BMP 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
- .jpg, .jpeg, .jfif, .pjpeg, .pjp
- Output
- .bmp (image/bmp)
- Output name
- The original name with the new extension, for example photo.jpg becomes photo.bmp.
- File size limit
- 50 MB
- Processing
- In your browser. The file is not uploaded.
JPG against BMP
| Feature | JPG | BMP |
|---|---|---|
| Compression | Lossy | None, stored as written |
| Colour | 8 bits per channel | 8 bits per channel |
| Transparency | None | None |
| Animation | No | No |
| Keeps EXIF | Yes | No |
| Browser support | Every browser since 1995 | Every browser since 1995 |
| Size of a photograph | The baseline this row compares against | 8 to 20 times a JPG |
| Published | 1992 | 1990 |
When you would want this
You are going to keep editing it
JPG discards detail every time it is encoded, so a file that has been opened and saved a few times has lost something at each step. Moving to BMP does not bring back what has already gone, but it stops the next save from taking more. Convert once, then work in BMP until you are finished.
How to use it
- Choose a .jpg / .jpeg / .jfif / .pjpeg / .pjp file, or drag one onto the page.
- Optionally set a width or height to resize at the same time.
- Select Convert, then download the BMP file.
Limitations
- The output is uncompressed 24-bit BMP, so the file is large: roughly three bytes per pixel regardless of the picture.
- 24-bit BMP has no transparency, so transparent areas are filled with the background colour you choose.
- 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.
Common problems
The BMP file is larger than the JPG you started with
A photograph stored as BMP runs about 8 to 20 times the size of the same picture as JPG, against 1 to 1 for JPG. That is not a fault in the conversion; it is what the two formats do.
If size is what matters, AVIF is the smaller of the options here. If you needed BMP for a reason, resizing the image first is the one lever that always works.
The camera settings and GPS location are gone from the BMP
JPG carries an EXIF block and this conversion does not move it across. The image is decoded to pixels, drawn, and encoded again as BMP, and the metadata does not survive that round trip.
Keep the original JPG if you need those fields. If you were converting in order to strip location data before publishing, this is the behaviour you wanted.
Other ways to do this
The program already on your computer
Paint on Windows, Preview on macOS, GIMP will open a JPG and save it as BMP, 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 BMP *.JPG. 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 JPG to BMP 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.
- Does converting to BMP lose any quality?
- The conversion itself does not. BMP is lossless, so every pixel it is handed is written exactly as it arrived and nothing is discarded on the way. What it cannot do is recover detail your JPG had already lost before it got here: a lossless format preserves what it is given, it does not restore what is gone.
- Will the BMP be bigger or smaller than the JPG?
- Smaller or larger depending on the pair, and here the arithmetic is public: a photograph as JPG runs 1 to 1 times the size of the same picture as JPG, and as BMP it runs 8 to 20. The comparison table above states both, so you can tell before converting rather than after.
- 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 JPG to BMP converter?
- No, to all of it. JPG to BMP 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 JPG to BMP 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 JPG to BMP 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 JPG to BMP 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.