BMP to JPG Converter — From 20 MB to Under 500 KB

How to convert BMP to JPG

1. Drop your BMP files onto the converter above — or click to browse and select multiple files.
2. Click Convert on any individual file, or Convert all to process the entire batch at once.
3. Download individually or click Download all for a ZIP archive.
4. Tip: BMP has no transparency — no quality difference to worry about. The JPG output is direct and visually identical at quality 0.92.

No upload — huge BMP files converted instantly in your browser

BMP files can be 6–100 MB each — the kind of size that makes server-based converters timeout or reject uploads entirely. This converter runs in your browser — no upload, no queue, no file size cap imposed by a server.

Processing is done by the Canvas API on your own CPU. Even a 50 MB BMP converts in seconds. Once the page loads, the tool works offline — useful for screenshots from internal systems or confidential documents.

// BMP has no transparency — no white fill needed
const canvas = document.createElement('canvas')
canvas.width = img.width
canvas.height = img.height
canvas.getContext('2d').drawImage(img, 0, 0)
// 90–98% smaller than BMP at quality 0.92
canvas.toBlob(cb, 'image/jpeg', 0.92)

Who converts BMP to JPG

Windows users taking screenshots with Snipping Tool or Paint who end up with oversized BMP files. Paint saves as BMP by default — a single screenshot can be 3–6 MB. Converting to JPG makes them instantly shareable via email or messaging apps.

IT administrators capturing system states, error dialogs, or configuration screens. BMP screenshots from remote desktop sessions (RDP) are often the default output — converting to JPG compresses them for helpdesk tickets and documentation.

Architects and CAD users exporting floor plans from older design software that outputs BMP. Converting to JPG makes the files small enough to attach to client proposals and project documentation without hitting email size limits.

BMP vs JPG — format comparison

When to convert to JPG vs PNG

Convert BMP to JPG when:

• Email attachments — JPG compresses a 20 MB BMP to under 1 MB, accepted by every mail service
• Web upload — browsers don't display BMP; JPG is the universal web image format
• Social media — Twitter, Facebook, Instagram all require JPG or PNG, not BMP
• Client deliverables — send photographic screenshots as JPG; they open on every device
• Photographic BMP content — photos and complex images compress well as JPG with no visible loss

Convert BMP to PNG instead when:

• Screenshots with text or UI — PNG is lossless; JPG blurs sharp text and UI edges
• Diagrams and charts — flat-color areas and sharp lines look better in PNG
• Lossless quality required — PNG preserves every pixel exactly; JPG introduces minimal artifacts
• Design workflow — PNG is the correct format for design tools like Photoshop or Figma

How the conversion works

Your browser draws the BMP file onto an HTML5 Canvas via the Canvas API. BMP has no transparency, so no white fill is needed — pixel values are captured exactly. The Canvas re-encodes the data as JPG via toBlob() at quality 0.92.

Quality 0.92 achieves 90–98% size reduction compared to BMP. The exact ratio depends on image content — photos with fine detail achieve ~95% reduction; flat-color screenshots or diagrams can reach 97–99%.

const blob = await new Promise(resolve => {
  const img = new Image()
  img.onload = () => {
    const canvas = Object.assign(
      document.createElement('canvas'),
      { width: img.width, height: img.height }
    )
    canvas.getContext('2d').drawImage(img, 0, 0)
    // BMP: ~6 MB → JPG: ~400 KB at 0.92 quality
    canvas.toBlob(resolve, 'image/jpeg', 0.92)
  }
  img.src = URL.createObjectURL(bmpFile)
})