BMP to JPEG converter

BMP → JPG compressed our 12,054 byte 24-bit bitmap to a 1,268 byte JPEG at quality 90.

Converted with Image engine · nothing stored
Free: 5 conversions a day · 5 MB each
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From real runs

What you get — and what changes

Element	Result	What happens
Pixel dimensions	Kept	The 80×50 bitmap wrote an 80×50 JPEG with no default resize.
Color values	Changed	JPEG compression shifted sampled corner colors slightly from the original BMP values.
Flat text edges	Changed	White label text in the bitmap becomes subject to JPEG ringing around hard edges.
Transparency	Lost	The tested BMP had no alpha, and JPEG output cannot carry alpha even if a source variant has it.
File size	Changed	The sample dropped from 12,054 bytes to 1,268 bytes because JPEG compressed the RGB bitmap.
BMP resolution fields	Lost	The JPEG inspection showed JFIF fields rather than preserving the BMP pixel-per-meter metadata.

Pixel dimensions Kept
The 80×50 bitmap wrote an 80×50 JPEG with no default resize.
Color values Changed
JPEG compression shifted sampled corner colors slightly from the original BMP values.
Flat text edges Changed
White label text in the bitmap becomes subject to JPEG ringing around hard edges.
Transparency Lost
The tested BMP had no alpha, and JPEG output cannot carry alpha even if a source variant has it.
File size Changed
The sample dropped from 12,054 bytes to 1,268 bytes because JPEG compressed the RGB bitmap.
BMP resolution fields Lost
The JPEG inspection showed JFIF fields rather than preserving the BMP pixel-per-meter metadata.

Sample conversions

Flat bitmap card

Input: An 80×50 Windows BMP with pale background, a blue block, and white bitmap text.
Output: A 1,268 byte JPEG. The card was recognizable, but sampled colors shifted because JPEG is lossy.

Photo stored as BMP

Input: A large RGB BMP exported from an old scanner or camera utility, with continuous-tone image content.
Output: A much smaller JPEG suited to upload forms. Fine texture would change under the quality setting.

A real BMP → JPEG run

We converted our BMP sample (703 KB) with Image engine on 2026-10-20. It took 10 ms and produced a 15 KB JPEG file, 98% smaller than the input. The engine raised 1 warning, listed below.

Input · sample.bmp · 703 KB

600 × 400 px, 24-bit

Width: 600
Height: 400
Encoding: 24-bit

Output · sample.jpg · 15 KB

600 × 400 px, baseline

Width: 600
Height: 400
Encoding: baseline

Image metadata stripped from output.

Is your file a scan?

BMP → JPG makes a scan easier to upload to JPEG-only systems, but it does not add recognition. Extract text from the bitmap before relying on the converted photo.

Options and when to change them

quality: Lower it for previews and raise it for photos with gradients or small text over flat areas.
background: Set a matte only if the BMP variant contains transparency that must be flattened predictably.
width: Resize oversized BMP captures before writing JPEG output.
height: Use with width and fit when the JPEG must match exact upload dimensions.

Do it yourself

Pillow 11

bash

from PIL import Image

Image.open("in.bmp").convert("RGB").save("out.jpg", quality=90, optimize=True)

Do not use JPEG for flat UI captures when halos around text are unacceptable.

BMP to JPEG by API or MCP

The HTTP API and the MCP server run the exact engine this page uses (Image engine); the response carries the same warnings the web converter shows. Check support first with GET /api/v1/pairs?from=bmp&to=jpg.

curl

curl -X POST https://filetypeconverters.com/api/v1/convert \
  -H "Authorization: Bearer $FTC_API_KEY" \
  -F "file=@input.bmp" -F "from=bmp" -F "to=jpg" \
  -F 'options={"dpi":96}' \
  --output output.jpg

Options this engine accepts for BMP → JPEG

Key	Applies to	Type	Default
dpi	Reading BMP	number	96
width	Writing JPEG	number	0
height	Writing JPEG	number	0
fit	Writing JPEG	contain · cover · fill	contain
quality	Writing JPEG	number	90
background	Writing JPEG	string	#ffffff
stripMetadata	Writing JPEG	boolean	true

API reference

When this is the wrong conversion

Use BMP → PNG for screenshots, diagrams, and any bitmap where exact pixel colors matter.
Keep BMP if the destination is an older Windows-only workflow that expects .bmp.
Use OCR before image conversion when the BMP is a scan of a document.

BMP to JPEG questions

Does BMP → JPG change colors?

Slightly, yes. Our sampled corner changed after JPEG compression, which is expected for lossy output.

Why is JPG smaller than BMP?

BMP is commonly raw or lightly encoded pixel data. JPEG uses lossy compression, so our 12,054 byte sample became 1,268 bytes.

Should screenshots use BMP → JPG?

Usually no. PNG is a better target for flat screenshots because it avoids JPEG halos around text and icons.