WebToolsPlanet
Converter Tools

JPG to BMP Converter

Upload a JPG and download it as an uncompressed 24-bit BMP bitmap — converted entirely in your browser.

JPG → BMP24-bitBrowser basedFree

Last updated: May 30, 2026

Client-Side Processing
Input Data Stays on Device
Instant Local Execution
Something wrong with this tool? Report it

Find this tool useful? Support the project to keep it free!

Buy me a coffee

What is JPG to BMP Converter?

JPG to BMP converts JPEG photos into Windows BMP (bitmap) files. BMP stores raw, uncompressed pixels, which some imaging software, scanners, and embedded devices require. Converting from JPG to BMP does not recover detail lost to JPEG compression, but it produces a clean, uncompressed bitmap of the decoded image.

This converter decodes your JPG with the browser's image engine and writes a standard 24-bit uncompressed BMP. Nothing is uploaded to a server.

How to Use JPG to BMP Converter

1

Drop a JPG file onto the upload area or click to browse

2

The image is decoded and written as a BMP instantly

3

Compare the BMP preview with your original

4

Click Download to save the BMP

Common Use Cases

  • Producing an uncompressed bitmap for software that needs BMP input.
  • Converting a JPEG photo to BMP for an image-processing pipeline.
  • Preparing a bitmap for embedded systems or legacy Windows tools.
  • Exporting a JPG as a raw, artefact-free bitmap for editing.

Example Input and Output

A compressed JPG photo converts to a large, uncompressed 24-bit BMP.

Input
photo.jpg (310 KB, JPEG)
Output
photo.bmp (5.9 MB, 24-bit BMP)

How This Tool Works

The browser decodes the JPG to canvas pixels and writes a 24-bit uncompressed BMP file for download.

Technical Stack

TypeScriptCanvas APIBMP encoderBITMAPINFOHEADERClient-side processing

Format

Output is a 24-bit BI_RGB BMP with bottom-up rows — the most widely compatible bitmap variant.

Privacy

Your image never leaves the browser; conversion is fully client-side.

Frequently Asked Questions

Is my JPG uploaded anywhere?

No. Decoding and BMP encoding run entirely in your browser.

Why is the BMP so much larger than the JPG?

BMP stores every pixel uncompressed, while JPG is heavily compressed, so the BMP is typically many times larger.

Does converting to BMP improve quality?

No. Any detail already lost to JPEG compression cannot be recovered; the BMP is an uncompressed copy of the decoded image.

What BMP format is produced?

A 24-bit uncompressed BI_RGB BMP, the most widely compatible bitmap variant.

Related Tools