Convert BMP

Convert your BMP images to any modern format Online Free - 100% Local. 100% local conversion · your files are never uploaded to the server

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PNG.png

JPG.jpg

JPEG.jpeg

BMP.bmp

WebP.webp

TIFF.tiff

TIF.tif

ICO.ico

JFIF.jfif

PJPEG.pjpeg

PJP.pjp

📋 PNG - Sin pérdida de calidad, soporta transparencia, ideal para logos y gráficos
PNG (Portable Network Graphics) is a lossless format that supports transparency. Perfect for logos, icons, and graphics with sharp edges.

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BMP format guide

Converting from BMP: why it is so heavy and how much you will shrink it

An uncompressed format from the 1980s: where its size comes from and what to expect when converting

BMP — Bitmap, or more formally Device Independent Bitmap — has been the native Windows image format since the late 1980s. Its design reflects an era when the priority was letting the system push an image to the screen as fast as possible, without spending CPU on decompression. That is why a BMP stores pixels as they are, one after another, compressing nothing.

That design makes it trivially simple to read and write, which is why it still turns up in scanners, industrial software, capture tools and legacy programs. It also makes it the heaviest format you are likely to encounter.

Where the size actually comes from

A BMP's size can be calculated in advance, because it does not depend on the image content: width × height × bytes per pixel, plus a small header and a few padding bytes so each row ends on a multiple of 4.

Resolution	Depth	Approximate BMP size
800 × 600	24-bit (3 bytes/pixel)	about 1.4 MB
1920 × 1080	24-bit	about 5.9 MB
1920 × 1080	32-bit (4 bytes/pixel)	about 7.9 MB
3840 × 2160 (4K)	24-bit	about 23.7 MB
6000 × 4000 (camera photo)	24-bit	about 68.7 MB

And that number is the same whether the image is a complex photograph or a white square. A JPEG of that same white square would take a few kilobytes; a PNG, less still. BMP does not distinguish: it reserves space for every pixel regardless.

ℹ️ The BMP specification does define an RLE compression for 4- and 8-bit images, but it is barely used and does not help with true-colour images. In practice, when someone says "BMP" they mean an uncompressed file.

How much you will save by converting

This is the conversion with the most spectacular result of all, because you are starting from the worst possible case. Roughly, for a typical photographic image:

To PNG — without losing a single pixel

Still lossless, exactly the same pixels, but with real compression behind it. The reduction is enormous and there is no downside: for graphics and screenshots it is the obvious conversion.

To JPG — the smallest file

Lossy compression designed for photography. It shrinks far more than PNG, at the cost of permanently discarding detail. Ideal if the image is a photo that will only be looked at.

To WebP — the best of both

It has a lossless mode (better than PNG) and a lossy one (better than JPG), plus an alpha channel. The recommended destination if the image is headed for a website.

To TIFF — if the destination is print

Still large, but it supports lossless compression and it is what professional print workflows expect. Far better than handing over a BMP.

💡 If the image is a graphic, a screenshot or a drawing, convert to PNG. You lose absolutely nothing and the space saving is enormous. Save JPG for when the content is genuinely photographic.

Two BMP quirks worth knowing

Rows are stored bottom to top. Inherited from the original Windows coordinate system, the first row in the file is the bottom row of the image. A reader that ignores this displays the picture upside down — hence BMPs that appear vertically flipped in poorly implemented programs.
Transparency is unreliable. Although BMP's more modern headers do define an alpha channel, real support across programs is so uneven that in practice you cannot count on it. If your image needs transparency, the right destination is PNG or WebP.

Converting your BMP files step by step

Look at what kind of image it is

Graphic, screenshot or drawing with flat areas → PNG. Photograph with texture and gradients → JPG or WebP. This is the decision that most affects the result.

Pick the output format

Select the destination above and read the note describing it.

Add your BMP files

Drag them onto the drop zone or click to select them. As these are large files, be patient with high-resolution ones.

Convert and download

All processing happens in your browser, so not even a 60 MB BMP is uploaded anywhere.

Because it is not compressed. It stores every pixel explicitly, so its size depends only on resolution and colour depth, not on content. A 1920×1080 image at 24-bit takes about 5.9 MB whether it is a photograph or a single-colour rectangle.

None at all. PNG is lossless, just like BMP: it stores exactly the same pixels, only genuinely compressed. It is the ideal conversion if you want to cut the size without giving anything up.

It depends on the content and the quality you choose, but the reduction against a BMP is usually one or two orders of magnitude. Bear in mind JPEG discards information permanently: keep the original if you will keep editing.

Because of the row order. BMP stores the image bottom to top, and a reader that ignores that paints it flipped. The file is fine; the problem is with the program opening it.

Only if your BMP genuinely has it, which is rare: alpha support in BMP is so inconsistent across programs that most files do not include it. If you need transparency, it is normally created during editing rather than recovered from the BMP.

Almost never, unless a specific program requires it. Its only real advantage is how trivial it is to read and write without libraries, which explains why it still appears in industrial and scanner software. For anything else, PNG beats it with no trade-off.

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