Convert BMP to JPG
For photographic content — scans, screenshots of photos, old camera exports — JPG shrinks an uncompressed BMP by 95% or more. That is the difference between an email attachment bouncing and just sending. For graphics with sharp edges and text, use the BMP to PNG tool instead; JPG softens edges.
Also useful: Convert BMP to PNG
How it works
Select your BMP files — old scans, Paint exports, whatever a legacy program produced.
Quality sits at 88 by default, plenty for photographic content; the per-file readout shows the usually dramatic size drop instantly.
Fetch the JPGs individually, or as a zip once you’ve converted a stack.
BMP vs JPG
The decision hinges entirely on what the pixels show. A scanned photo drops from 6 MB raw to a few hundred kilobytes at quality 88 with no visible change; a text-heavy scan pays for that same shrinkage in smudged letters. Photos take this route — documents deserve a lossless one.
| BMP | JPG | |
|---|---|---|
| Compression | Usually none (raw pixels) | Lossy |
| Transparency | No | No |
| Animation | No | No |
| Support | Universal on desktop | Universal — the safest format there is |
| Best for | Legacy Windows software, raw pixel exchange | Photographs and strict upload forms |
Frequently asked questions
No — that is the whole reason I built this. The conversion runs in your browser using WebAssembly, so your files never leave your device; there is no server in the loop at all. It also means the tool keeps working offline once the page has loaded, and there is no file size limit beyond your device’s memory.
A photographic BMP typically shrinks 95–98% at quality 88 — a 6 MB bitmap becomes 100–300 KB. The savings are enormous because you are going from zero compression to one of the most effective photo codecs ever deployed.
On photos at quality 88, no — the encode is visually transparent. On text, line art and UI screenshots you may notice slight softening around hard edges; that content belongs in PNG, which compresses it losslessly and still dramatically smaller than BMP.
For document scans destined for email or archiving, quality 85–90 is plenty. If the scans are text-heavy and you need maximum legibility, convert to PNG instead — lossless matters more than the last bit of size for documents you might OCR later.
They sit at opposite extremes: BMP keeps every pixel and pays 6 MB for a simple screenshot; JPG discards what eyes cannot see and pays 100–300 KB for the same content. For photographic material that trade is overwhelmingly worth it. The one nuance is generational loss — a JPG re-saved repeatedly degrades, so if the image is irreplaceable, keep one lossless master alongside the copies you share.
Text-heavy ones. A scanned contract, a UI screenshot, line art — JPEG’s compression was tuned for continuous tones, and it smears the sharp black-on-white edges that make text legible, which also hurts OCR later. Those files shrink dramatically and stay razor sharp through BMP to PNG instead. Reserve JPG for scans of photographs, where its 95–98% savings are unbeatable.
Related tools
Convert BMP to PNG
Convert BMP to PNG in your browser — free, lossless, private, no upload. Cut uncompressed bitmaps down by 50–90% without touching a pixel — no tradeoff.
Convert JPG to WebP
Convert JPG to WebP in your browser — free, no upload, no account. Photos come out 25–35% smaller at the same visual quality, with a live quality slider.
Convert PNG to JPG
Convert PNG to JPG in your browser — free, no upload, no watermarks. Shrinks photographic PNGs by 70–90% at quality 85, with a live quality slider per file.
Convert BMP to PDF
Convert BMP to PDF in your browser — free, no upload, no watermark. Old scans and bitmaps become compact, sendable PDFs — often far smaller, losing nothing.