BMP to JPG.
Open a BMP image and save a real JPG file. The conversion happens on your device.
Drop a photo here.
Choose a file above, or start with a sample. Your image stays on this device.
Local workspace limit: 24 megapixels and 10,000 pixels per side. Output keeps the source dimensions unless you resize or crop. Tool specifications and methods.
Choose the right output
JPG is useful for opaque photographs and widely accepted uploads. It uses lossy compression, so inspect small text and fine texture after export.
BMP files can contain large uncompressed pixel arrays. Exporting to a compressed format can reduce storage, but the actual result depends on the source.
Questions that come up
Does this change more than the extension?
Yes. The browser decodes the source, draws its pixels to a canvas and encodes a new file. The export checks its actual MIME type before saving.
Will the output be smaller?
Not always. Dimensions, image content and encoder settings affect the result. Compare the downloaded byte count and keep the original.
What happens to transparency?
JPG cannot store transparency. The export places transparent areas on white.
Sources & method
Last checked: . Official rules can change. Calculated presets are identified separately.
- Image file type and format guide. MDN Web Docs. Checked 2026-10-29.
- HTMLCanvasElement.toBlob. MDN Web Docs. Checked 2026-10-29.
- Published tool specifications. Backdropless. Checked 2026-10-29.