Are my images uploaded to a server?

No. The entire conversion runs inside your browser using the HTML5 Canvas API. Your image file never leaves your device.

Why is the BMP file larger than the original PNG?

BMP files are uncompressed. Each pixel is stored as raw RGB bytes, so a 1000x1000 image becomes roughly 3 MB. PNG uses lossless compression, which is why PNGs 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). This preserves full color fidelity for all images. Transparency from the PNG is composited onto the background color you choose before conversion.

Does BMP support transparency?

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

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 × 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 Uint8Array typed arrays used for BMP encoding are universally supported.

PNG to BMP Converter

Upload a PNG image and download it as a BMP — all converted locally in your browser, nothing sent to any server.

Upload PNG

Click or drag a PNG here

PNG files only

Conversion Options

Background Color

Applied to transparent areas (BMP has no alpha channel)

Preview

Upload a PNG to get started

Then click "Convert to BMP"

Downloaded!

Summary

This tool converts PNG 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 that may not accept PNG. The output uses 24-bit color depth (RGB), preserving color fidelity while compositing any transparent PNG areas onto a configurable background color.

How it works

Select or drag a PNG image onto the upload area.
Choose a background color for any transparent areas in the PNG.
Click "Convert to BMP" to process the image in your browser.
A preview of the output renders instantly with file size details.
Click "Download BMP" to save the converted file to your device.

Use cases

Convert PNG images 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 icons or logos to BMP for older design tools.
Process images privately without uploading to a 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