BMP to JPEG Converter
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Supports: BMP
Advanced Options - Our defaults are optimized for the best results. We recommend you keeping the defaults unless you have a specific need.
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Windows bitmap (BMP) files store every pixel uncompressed, so a single 1080p photo weighs about 6 MB and a 12-megapixel shot can top 30 MB. Converting to JPEG applies lossy compression that typically shrinks the same image to a few hundred kilobytes — a 12-20x reduction — while keeping it sharp enough that the difference is hard to spot. The result loads fast on the web, attaches to email without hitting size caps, and opens on every device.
How to Convert BMP to JPEG
- Upload Your BMP File: Drag and drop your
.bmpfiles onto the page or click "+ Add Files". You can queue several bitmaps and convert them in one batch. - Pick a Quality Preset: Leave it on "Very High (Recommended)" for near-original quality, or step down to High or Medium to squeeze the file smaller. Lower presets trade visible detail for size.
- Set a Target File Size (Optional): Use "Specific file size" to cap the output at an exact size (for example 1 MB), or "Target file size (%)" to scale it down by a percentage. Auto Scale keeps the dimensions sensible so the image does not pixelate.
- Convert and Download: Click "Convert" and save your JPEG. No sign-up, no watermark. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours.
BMP vs JPEG at a Glance
| Property | BMP | JPEG |
|---|---|---|
| Compression | Usually none (optional RLE on palette images) | Lossy (DCT-based) |
| Typical 1080p photo size | ~6 MB | ~0.3-0.5 MB |
| Color depth | 1, 4, 8, 16, 24, or 32-bit | 24-bit (8 bits per channel) |
| Transparency / alpha | Yes, in 32-bit BITMAPV4HEADER | No |
| Re-saving loses quality | No (lossless) | Yes (each save discards more data) |
| Developed by | Microsoft (Windows, OS/2) | Joint Photographic Experts Group, 1992 |
| Best for | Lossless masters, legacy Windows tools | Photos, web images, email attachments |
Frequently Asked Questions
How much smaller will my BMP get as a JPEG?
For a typical photographic image, expect roughly a 12-20x reduction at high quality. A 1920x1080 24-bit BMP is about 5.9 MB; the same picture as a high-quality JPEG usually lands between 300 and 500 KB. Flat graphics with large solid-color areas can compress even further, though JPEG is less efficient on sharp-edged line art than PNG.
Will I lose image quality converting BMP to JPEG?
Yes, slightly — JPEG is a lossy format, so some pixel data is discarded to achieve the size savings. At the "Very High" preset the loss is barely perceptible for photos. The catch is that the loss is permanent and compounds: every time a JPEG is re-saved it sheds a little more detail, so keep your original BMP if you plan to edit further.
Does the JPEG keep the transparency from my BMP?
No. JPEG has no alpha channel, so any transparency from a 32-bit BMP is flattened against a background (white by default). If your bitmap has transparency you need to preserve, convert to BMP to PNG instead — PNG is lossless and keeps the alpha channel intact.
Should I output as JPG or JPEG?
They are the same format. "JPG" exists only because older Windows versions limited file extensions to three letters; "JPEG" and ".jpg" produce byte-identical files. This converter lets you pick either extension from the File extension dropdown — choose whichever your software or workflow expects.
How big a BMP can I upload?
There is no fixed file-count limit and no watermark. The practical constraint is upload time, since uncompressed bitmaps are large — a 12-megapixel BMP can be 30 MB or more, so a fast connection helps. In our testing, a 6 MB 1080p BMP converted at the Very High preset produced a 410 KB JPEG in a couple of seconds. If you need the reverse direction later, see JPEG to BMP.