JPG to BMP Converter

What Does This Tool Do?

This tool converts JPG (JPEG) images into BMP (Bitmap) format directly in your browser. BMP is an uncompressed image format native to Windows that stores raw pixel data without any lossy compression artifacts. The resulting files will be significantly larger than the original JPG, but they preserve exact pixel values and are compatible with older Windows applications and embedded systems that require bitmap input.

How to Convert JPG to BMP

1. Upload your JPG file — drag and drop or click to browse.
2. Verify the format — the source format is detected automatically.
3. No quality adjustment needed — BMP is an uncompressed format, so every pixel is stored exactly as-is.
4. Click Convert — instant browser conversion.
5. Compare the results — side by side with file sizes.
6. Download — save the converted file.

JPG vs BMP — Key Differences

JPG uses lossy DCT-based compression that dramatically reduces file size at the cost of some image quality, making it ideal for photographs on the web. BMP stores raw, uncompressed pixel data and produces files that are typically 10 to 30 times larger than equivalent JPGs. While JPG supports millions of colors in a compact format, BMP preserves every pixel without any additional compression loss. BMP also lacks support for transparency, but its simplicity makes it easy to parse in legacy software and hardware systems.

When to Use BMP Instead of JPG

BMP is the right choice when you need to interface with older Windows applications, embedded systems, or specialized hardware that only accepts bitmap input. It is also useful in image processing pipelines where you want to avoid any further compression artifacts and need raw pixel data for analysis or manipulation.

Frequently Asked Questions

Why is my BMP file so much larger than the JPG?

BMP stores every pixel without compression, while JPG uses lossy compression that can reduce file sizes by 90% or more. A 500 KB JPG photo can easily become a 5-15 MB BMP file depending on its dimensions.

Will converting JPG to BMP improve image quality?

No. Any quality lost during the original JPG compression cannot be recovered. The BMP will contain the same pixel data as the decoded JPG — it simply stores that data without further compression.

Does BMP support transparency?

Standard BMP files do not support transparency. If you need an uncompressed format with an alpha channel, consider PNG instead.

Is my image uploaded to a server?

No. The conversion happens entirely in your browser using the HTML Canvas API. Your image never leaves your device.