BMP is an uncompressed bitmap format from early Windows that stores raw pixels, resulting in very large files. BMP files often come from legacy software or older screen captures and are impractical to share.
PNG is a lossless format that preserves every pixel exactly and supports full transparency. {T} is lossless, so the result is a pixel-perfect copy with no compression artifacts.
FreeConvertImg converts your BMP files to PNG entirely inside your browser — nothing is ever uploaded to a server, so the process is instant and completely private. There are no watermarks, no sign-up and no limits. Convert a single image or a whole batch at once, then download each PNG file individually or all of them together in a ZIP archive.
Frequently Asked Questions
Why convert BMP to PNG?
PNG is lossless and universally supported, making it ideal for editing and for graphics that need crisp detail or transparency.
Does the conversion reduce quality?
No. PNG is lossless, so the output is an exact copy of the decoded image.
Are my files uploaded to a server?
No. The entire conversion runs locally in your browser, so your files never leave your device.