PNG to BMP Converter

PNG to BMP — and Should You Actually Convert?

Converting a PNG to a BMP gives you an uncompressed Windows bitmap: raw pixel data with no decoding step. It does not improve quality — PNG is already lossless, so a BMP holds the same pixels in a much larger file. Convert to BMP only when something downstream specifically needs a raw bitmap: legacy Windows software, an embedded display, or an image pipeline that reads BMP directly. If you just want a smaller or more shareable file, this is the wrong direction.

PNG vs BMP — Side by Side

When to Pick BMP

• A legacy Windows program or SDK only opens .bmp and rejects PNG.
• An embedded system, microcontroller, or e-paper/LCD display expects a raw bitmap it can blit without a decoder.
• A build or graphics pipeline (a font/sprite tool, a hardware image loader) requires uncompressed BMP input.
• You need a predictable, header-plus-raw-pixels file you can parse byte-for-byte without a PNG/zlib decoder.

When to Stay on PNG (or Pick Something Smaller)

• You want a smaller file, faster downloads, or anything web-facing — keep the PNG.
• You need transparency to survive — BMP will flatten it; PNG preserves the alpha channel.
• You only need a compact photo: convert to JPG instead with PNG to JPG, which is far smaller for photographic images.
• You already have a BMP and want it back to a web format — see BMP to PNG.

How to Convert PNG to BMP

1. Upload Your PNG File: Drag and drop your PNG onto the page, or click "Add Files" to pick one or several from your computer.
2. Pick a Quality Preset: Open Advanced Options and choose a Quality preset; for an exact copy of the source pixels, leave it at the highest setting.
3. Set Image Resolution (Optional): Use the Image resolution controls — a resolution percentage, a preset size, or a custom Width × Height — if you need to resize while converting.
4. Convert and Download: Click Convert and download your BMP. No sign-up, no watermark.

Frequently Asked Questions

Will converting PNG to BMP improve the image quality?

No. PNG is already a lossless format, so the BMP contains exactly the same pixels — there is nothing to "improve." The only thing that changes is that the data is now stored uncompressed, which makes the file larger without adding any detail.

Why is my BMP so much bigger than the original PNG?

Because BMP normally stores every pixel uncompressed, while PNG packs the same image with lossless DEFLATE compression. A 24-bit BMP roughly takes width × height × 3 bytes plus a small header regardless of the content, so a PNG that compressed well can balloon to several times its size as a BMP. This is expected, not a conversion error.

Does BMP keep my PNG's transparency?

In practice, no. Most BMP files are opaque, and the common 24-bit BMP has no alpha channel at all. Only the later 32-bit BMP variant can carry alpha, and a lot of software ignores it — so transparent areas are typically flattened onto a solid background. If transparency matters, keep the PNG.

What bit depth will the BMP use?

BMP supports 1, 4, 8, 16, 24, and 32 bits per pixel. A full-color photo or screenshot normally maps to a 24-bit BMP (true color, no alpha), which is the most widely compatible choice for legacy Windows software and raw-bitmap pipelines.

Can a BMP be compressed at all, or is it always uncompressed?

The BMP container does define RLE compression for 4-bit and 8-bit indexed images, but 16-, 24-, and 32-bit BMPs are stored uncompressed, and most tools that ask for BMP expect the plain uncompressed form. That is exactly why people choose BMP — they want raw pixels, not another compressed file.

Will the BMP open on Windows, Mac, and Linux?

Yes. BMP is one of the oldest and most broadly supported raster formats: it opens in Windows Photos and Paint, Preview on macOS, and the standard image viewers on Linux, plus virtually every image editor. The catch is size and lack of transparency, not compatibility.

Is there a file size limit, and what happens to my upload?

In our testing, a 1920×1080 24-bit screenshot exported to roughly a 6 MB BMP from a PNG well under 1 MB — so plan for large outputs. The main practical limit is upload size and time rather than the conversion itself. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public.