BMP to PNG

BMP files store pixels with little or no compression, so they are very large. Converting to PNG keeps the image lossless while cutting the file size substantially.

Drag & drop files here

or Browse files

Max file size: 100 MB

Quality: 80%

Processed locally in your browser. Files are cleared when you leave the page.

Why use BMP to PNG?

Images arrive in whichever format the camera, phone or app happened to produce, and that is rarely the format you need next. Converting and resizing lets you meet an upload limit, strip a format a website refuses, keep a transparent background where it matters, or cut a photo from several megabytes down to something an email will accept — without losing the original, which stays untouched on your device.

How to use BMP to PNG

1Add your BMP files.
2Press Convert now.
3Each bitmap is re-encoded as PNG.
4Download the results.

Features

Lossless conversion — no pixel data is discarded.
Typically a large reduction in file size.
Batch processing of several bitmaps.

Supported formats

Input: BMP
Output: PNG

Your privacy

This tool runs entirely in your browser using JavaScript and WebAssembly. The file you select is read into your device's memory, converted there and offered back as a download — it is never uploaded to our servers. Closing or reloading the page clears it. If you are signed in, we store only the tool name, the number of files and their total size so you can see your own activity history; the file contents are never sent.

Read the full privacy policy

Tips for the best result

Start from the highest-quality original you have; converting an already-compressed file twice loses detail.
If you need transparency, keep the output in PNG or WebP — JPG cannot store an alpha channel.
When resizing for the web, set the width you actually display at rather than shrinking a huge image in CSS.
Compress last, after cropping and resizing, so you are not re-encoding the same pixels repeatedly.