JFIF to BMP Converter
To convert JFIF to BMP, add the file above and download the .bmp. The output is an uncompressed 24-bit Windows bitmap, which is what legacy Windows applications, some embedded displays and older industrial tools expect.
- Free & unlimited
- Nothing uploaded
Drop your JFIF files here
Free · No sign-up · Files never leave your device
More options
Why convert JFIF to BMP?
Almost nobody needs BMP in 2026 — until they do. Point-of-sale software, machine-vision tools, older Visual Basic applications, some CNC and embroidery controllers and a surprising amount of laboratory equipment will only accept an uncompressed bitmap.
Expect the file to be big. A 12-megapixel photograph becomes roughly 36 MB as a 24-bit BMP because every pixel is stored as three raw bytes with no compression whatsoever.
How to convert JFIF to BMP
- Add your JFIF file. Drag it onto the box above, press Choose files, or paste with Ctrl+V. Several files at once is fine.
- It converts straight away. There is nothing to set up — conversion starts on its own and runs on your own processor, so there is no upload wait and no queue.
- Press Download. One button per file, or a single ZIP for the whole batch. Quality and resizing live under “More options” if you want them.
Nothing on this page sends a network request while you convert. Open your browser's DevTools, switch to the Network tab, and watch it stay empty.
What happens to your image
The JFIF is decoded to pixels and written as a 24-bit BITMAPINFOHEADER bitmap with bottom-up row order and 4-byte row padding, which is the variant Windows tooling handles most reliably. No compression is applied, so no further quality is lost beyond what the JPEG already discarded.
| Property | JFIF | BMP |
|---|---|---|
| Full name | JPEG File Interchange Format | Windows Bitmap |
| Extension | .jfif, .jfi, .jif | .bmp, .dib |
| MIME type | image/jpeg | image/bmp |
| Compression | Lossy (DCT-based, JPEG baseline) | Usually uncompressed |
| Transparency | No | Yes |
| Animation | No | No |
| Standard | ITU-T T.871 | ISO/IEC 10918-5 | Windows GDI (BITMAPINFOHEADER) |
| Introduced | 1992 | 1987 |
| File signature | FF D8 FF E0 … 4A 46 49 46 00 | 42 4D ("BM") |
| Best used for | Nothing in particular — it is the same image as a .jpg, just labelled differently. | Legacy Windows applications and tools that refuse compressed input. |
BMP is defined by Windows GDI (BITMAPINFOHEADER) — read the specification.
Why this converter does not upload your files
Nearly every converter you will find works the same way: your file is uploaded to a server, converted there, and offered back as a download link. That means a copy of your image sits on somebody else's disk, for a retention period you have to take on trust, reachable by a URL you did not choose.
This one does not work that way. Browsers have been able to decode and re-encode images natively for years — the same capability every web application uses to show you a preview before an upload. This site simply stops at that point and hands you the result. There is no upload endpoint on this domain to send a file to, which is a stronger guarantee than any privacy policy: the capability does not exist.
The practical effects: nothing to delete afterwards, no size cap (your device's memory is the only limit), no queue at busy times, no daily allowance, and it keeps working if your connection drops mid-session. Sensitive material — ID scans, medical documents, contracts, anything under GDPR or HIPAA — never crosses a network boundary at all.
JFIF to BMP — frequently asked questions
Why is the BMP file so large?
BMP stores raw pixels with no compression. File size is roughly width × height × 3 bytes, plus a small header.
Does BMP improve quality over JFIF?
No. It preserves the decoded pixels exactly, but the JPEG compression already applied to the source cannot be undone.
What bit depth does the output use?
24-bit RGB. That is the most compatible variant across old Windows software.