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BMP

WebP to BMP Converter — Free, Online, No Upload

Downloaded a WebP but your old Windows program only opens BMP? Convert it right here without installing a codec.

Free · no signup2 free files a day100% in-browser · no upload

Tap to select WEBP files

or click to browse

2 free files per day (2 left today) · Up to 10 MB each · Upgrade for more

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✓ Files never uploaded✓ 100% browser-based✓ No account required
Need the reverse?BMP → WEBP

How to convert WEBP to BMP online

  1. 1

    Drop your WEBP file

    Drag your Web Picture Format file onto the box above, or click it to pick a file.

  2. 2

    Wait a few seconds

    Conversion starts on its own and runs on your device, not on a server.

  3. 3

    Download your BMP

    Click Download to save the Bitmap Image File file.

WEBP vs BMP: format overview

WEBP

Web Picture Format

Google (On2 Technologies acquisition) · 2010

Compression
hybrid
Color depth
8-bit
Transparency
Yes
  • ✓ 30% smaller than JPEG, 26% smaller than PNG
  • ✓ Supports both lossy and lossless
  • ✗ Not supported in some older apps
BMP

Bitmap Image File

Microsoft · 1987

Compression
none
Transparency
No
  • ✓ No compression — original pixel data preserved
  • ✓ Universal Windows support

WEBP magic bytes: 52 49 46 46 xx xx xx xx 57 45 42 50

BMP magic bytes: 42 4D

Why convert WEBP to BMP?

WebP is a modern Google-developed image format supported by all major browsers, but it's largely invisible to older desktop software. Windows 7 and earlier don't display WebP thumbnails in Explorer without a codec installed. Many legacy Windows applications — older Office versions, classic photo editors, industrial software, CNC tools — simply don't know what WebP is.

BMP is the Windows-native uncompressed format that has been supported by every version of Windows and virtually every Windows application ever written. If you're trying to use a WebP image in an older application that rejects it, BMP is the fallback that's almost guaranteed to work. It requires no codec, no plugin, and no software update — just open and use.

The file size penalty is severe. WebP's compression is very efficient; a 200 KB WebP can easily become a 10–20 MB BMP because BMP stores uncompressed pixel data with no compression. If WebP transparency is present (WebP supports full alpha channels), it converts cleanly to BMP — though BMP itself doesn't support transparency in most implementations, so transparent areas will be rendered as white or black. Use BMP only when a specific application requires it; for general compatibility, JPEG or PNG are much better choices.

Quality & file size: WEBP to BMP

Typical sizes (12MP photo): WEBP 1–3 MB → BMP 35–40 MB.

BMP will not bring back detail that WEBP compression already removed, but it adds no further loss — handy when you need to edit the image.

Frequently asked questions

My image editor won't open WebP — will BMP work?
Almost certainly yes. BMP is the oldest Windows image format and is supported by virtually every Windows application ever made, including very old editors that pre-date WebP by decades.
Is WebP to BMP conversion lossless?
If your WebP was a lossless WebP, the BMP output is pixel-perfect. If the source was a lossy WebP, the already-compressed pixels are stored in BMP without further loss, but original detail cannot be recovered.

Your WEBP file never leaves this tab — FormatDrop has no endpoint that receives file data. How it works