Convert BMP to JPG
BMP in, JPG out, in a second or two — processed on your device, nothing uploaded.
Output format
What this tool does
It decodes your BMP file and re-encodes the pixels as JPG at the quality you choose (92% by default — visually identical for photos). The file is read, converted and offered back as a download without touching the network.
About BMP
BMP is the uncompressed Windows bitmap: the raw pixels with a small header. It dates from Windows 1.0 and is still what MS Paint, many scanners and some industrial or embedded tools produce by default. It is good for legacy software, embedded devices and a few specialist tools that require it; less good for almost everything else — it is huge (a 1920×1080 screen capture is 6 MB), carries no useful metadata and browsers won't show it inline on web pages. Opens on Windows and most desktop editors; web browsers can display it but websites never serve it.
About JPG
JPEG (files end in .jpg or .jpeg — they are the same thing) is the 1992 lossy photo format that every camera, phone and website understands. It throws away detail the eye is bad at seeing, which is why a photo can be 10× smaller than as PNG while looking identical at normal viewing sizes. It is good for photographs and anything photo-like, email attachments, marketplaces and forms that demand .jpg, and situations where compatibility matters more than anything; less good for text, line art, screenshots and logos (the compression smears sharp edges into visible "ringing"), and anything that needs transparency — JPEG has none. Universal, and the safest choice when a form, portal or older program insists on a specific format.
What changes going from BMP to JPG
- Quality: JPG is lossy. At the default 92% nothing is visible; lower the slider for smaller files.
- Size: Exactly width × height × 3 bytes plus a header, no matter what the picture shows vs. typically 100 KB–4 MB for a phone photo depending on quality; re-saving a JPEG loses a little more quality each time.
- Metadata: EXIF (camera, date, GPS) is not carried over — the browser decodes pixels, not tags. That is a privacy plus for sharing and a minus if you rely on dates in the file.
From scanner or Paint to something you can send
BMP files are enormous because nothing in them is compressed; a scanned A4 page at 300 dpi is 25 MB. JPEG at 85–92% quality brings that to 1–2 MB with no visible loss for photos and scans of photos. For scanned documents or screenshots with text, BMP to PNG keeps the text perfectly sharp and is still far smaller than BMP.
How to convert BMP to JPG
- Drop the BMP file on the panel above or click to choose it.
- JPG is pre-selected; adjust the quality slider if you need a smaller file. Press Convert to JPG.
- Download. The file is named after the original with a
.jpgextension.
Frequently asked questions
Is my BMP file uploaded?
No. The page is static and has no upload endpoint; your browser does the work on your own device and the result is saved straight back to your disk. The site's Content-Security-Policy only allows it to talk to its own origin, so it cannot send your file anywhere even by accident. Load the page, disconnect from the internet, and it still works.
Does BMP to JPG lose quality?
JPG is a lossy format, so strictly yes — but at the default 92% quality the difference from the BMP is invisible at normal viewing size. Lower the slider only if you need a smaller file.
Will transparency survive?
BMP has no transparency to begin with, so there is nothing to lose; the JPG output is fully opaque, exactly like the source.
Is it free? Any limits or watermark?
Free, no account, no watermark, no daily quota. Because nothing runs on our servers there is nothing to meter. The only limits are your device's memory — anything up to roughly 50 megapixels is fine on a modern phone or laptop.
Can I do several files at once?
One file at a time at the moment — drop the next one as soon as you have downloaded the first. Batch processing with a ZIP in and out is planned.
Does it work on my phone?
Yes — iPhone, iPad and Android browsers all run it. Large files take a few seconds longer on a phone than on a laptop.