Are my images uploaded to a server?

No. The entire conversion runs inside your browser using the HTML5 Canvas API and a custom JavaScript BMP encoder. Your image file never leaves your device.

Why is the BMP file larger than the original JPG?

BMP files are uncompressed. Each pixel is stored as raw BGR bytes, so a 1000x1000 image becomes roughly 3 MB. JPEG and PNG use compression, which is why those files are much smaller. BMP is chosen when simplicity or compatibility matters more than file size.

What color depth does the output use?

The output uses 24-bit RGB (8 bits per channel, stored in BGR order as required by the BMP specification). This preserves full color fidelity for all images.

Does BMP support transparency?

Standard 24-bit BMP does not support transparency. This tool composites any transparent or semi-transparent pixels onto the background color you select before writing the BMP file.

Which input formats are supported?

JPG/JPEG, PNG, and WebP are all supported. The browser decodes the source image and the tool re-encodes the pixel data as a BMP.

Is there a file size limit?

The limit is your browser's available memory. Very large images may be slow to process on low-end devices. Images under 4000 x 4000 pixels work reliably in all modern browsers.

Which browsers are supported?

All modern browsers — Chrome, Edge, Firefox, and Safari 14+. The Canvas API, Blob downloads, and typed arrays used for BMP encoding are universally supported.

JPG to BMP Converter

Upload a JPG, PNG, or WebP image and download a 24-bit BMP instantly — converted entirely inside your browser with no file upload.

Upload Image

Click or drag an image here

JPG, PNG, and WebP supported

Conversion Options

Background Color

Applied to transparent areas (BMP has no alpha channel)

Preview (BMP output)

Upload an image to get started

Then click "Convert to BMP"

Downloaded!

Summary

This tool converts JPG, PNG, and WebP images to BMP (Bitmap) format entirely inside your browser using the HTML5 Canvas API. No files are ever uploaded to a server — all processing happens locally on your device. BMP is an uncompressed raster format widely supported by Windows applications, legacy software, and embedded systems. The output uses 24-bit color depth (BGR), with transparent areas composited onto a configurable background color before encoding.

How it works

Select or drag a JPG, PNG, or WebP image onto the upload area.
Optionally choose a background color for any transparent areas (relevant for PNG/WebP with transparency).
Click "Convert to BMP" to process the image entirely in your browser.
A preview of the output renders instantly with file size details.
Click "Download BMP" to save the 24-bit BMP file to your device.

Use cases

Convert JPG photos to BMP for Windows applications that require the format.
Prepare images for legacy software or embedded systems that only accept BMP.
Generate BMP assets for game development pipelines that use uncompressed textures.
Convert PNG or WebP images to BMP for older design tools.
Process images privately without uploading to any third-party service.
Create BMP files for use in document templates or reports.
Convert screenshots to BMP for compatibility with older operating systems.
Produce uncompressed images for environments where codec support is limited.

Frequently Asked Questions

Last updated: 2026-05-28 · Reviewed by Nham Vu