LokalPix
✦ BMP IMAGES · PROCESSED LOCALLY

Convert BMP to PNG
privately in your browser.

Convert BMP images into PNG files directly in your browser. PNG compresses losslessly and is significantly smaller than uncompressed BMP without discarding any image detail. Your files remain on your device.

Processed locally

Drop BMP files here

or choose files

BMP files · up to 20 files · max. 75 MB per image
Files stay on your deviceNo accountNo watermark
BMP TO PNG

From BMP to a lossless PNG file

PNG compresses pixels losslessly — no artefacts, no quality loss.

01
↥

Select BMP

Choose one or more BMP files from your device.

02
⌁

Confirm PNG

PNG is preset as the output format and does not need a quality slider.

03
↓

Save the PNG

Download results individually or collect multiple files in a ZIP archive.

FORMAT KNOWLEDGE

What happens when BMP becomes PNG?

LokalPix reads the BMP without compression and encodes the pixels losslessly as PNG.

BMP

Uncompressed storage

BMP stores every pixel value directly, without compression. This makes BMP easy to read but results in very large files.

PNG

Lossless compression

PNG uses lossless DEFLATE compression. It retains all pixel values exactly and produces smaller files than BMP.

IMPORTANT

Transparency is supported

PNG can store transparency through an alpha channel. If the BMP includes a transparency channel, it is carried over to the PNG.

FORMAT IN DEPTH

BMP and PNG compared

Technical background on lossless conversion.

How BMP is structured

BMP (Windows Bitmap) is an uncompressed raster format. Every pixel value is stored directly, which means simple readability but large file sizes.

How PNG compresses

PNG uses DEFLATE compression and handles repeating pixel patterns particularly well. This makes it efficient for screenshots, graphics, and images with flat colour areas.

What PNG does better than BMP

PNG is supported by all modern applications, smaller than BMP, and can store transparency correctly. It is the better choice for most use cases.

What is lost?

No image detail is lost — the conversion is entirely lossless. BMP-specific fields are not transferred to the PNG by default.

FREQUENT QUESTIONS

Questions about BMP to PNG

Answers about quality, privacy, and format limitations.

Is any image detail lost?

No. PNG compresses losslessly. All pixel values from the BMP are retained exactly.

Is transparency carried over to PNG?

Yes. If the BMP has a transparency channel, it is transferred to the PNG.

Why is PNG smaller than BMP?

BMP stores every pixel without compression. PNG uses lossless DEFLATE compression and therefore produces smaller files.

Are resolution and aspect ratio preserved?

Yes. LokalPix does not intentionally change the pixel dimensions during this conversion.

Are metadata preserved?

Metadata are removed by default. BMP-specific fields are not transferred to the PNG file.

Can I convert several BMP files?

Yes. Up to 20 files can be processed in one batch and downloaded individually or together as a ZIP archive.

PRIVACY BUILT IN

Your images belong to you.

Conversion uses your browser's built-in functions. There is no image upload and no cloud storage.

Technology and data flow in detail →