WEBP to BMP Converter Online
Turn WEBP images into uncompressed BMP files in your browser. Transparency is retained and whole batches convert at once with no upload.
How to Convert WEBP to BMP Online
Add your WEBP images, choose BMP as the output format, and download bitmap files that desktop software can open directly.
Step 1
Add WEBP Images
Drop in one file or select a whole batch.
Step 2
Choose BMP Output
Select BMP from the format list to keep every pixel.
Step 3
Download BMP Files
Save each bitmap or export the set as a ZIP.
Convert WEBP to BMP for Desktop Software That Needs Bitmaps
WEBP is a delivery format, optimised for moving pictures across a network quickly. BMP is almost the opposite: a Windows bitmap that stores pixel values in a plain grid with no compression, which makes the files enormous but also makes them trivially easy for software to read. That simplicity is why some programs still ask for a bitmap, and why the format has not fully disappeared. The trade is simple: you give up file size and gain a file that almost any program on a Windows machine can open without a decoding library.
The situations are specific but real, and they tend to appear in maintenance work rather than daily design tasks. Older Windows utilities and imaging tools accept BMP and nothing newer. Certain industrial, medical, and scientific applications expect an uncompressed bitmap as input. Firmware tools, embedded displays, and some printing utilities read BMP directly without a decoding library. Legacy scripting and batch workflows written years ago may only have a BMP parser available. Converting is usually faster than tracking down a plug-in or rewriting an old pipeline. Most people only need it once or twice, when an old system refuses anything else.
This converter writes a 32-bit BMP, which is worth knowing because it means the output retains an alpha channel. Transparent WEBP sources keep their transparency rather than being flattened onto a background colour, so cut-outs and logos survive the conversion intact. Not every viewer respects 32-bit BMP alpha, but the data is there rather than discarded, and most modern software reads 32-bit bitmaps without complaint.
Be prepared for the file size. Because BMP applies no compression, a bitmap is usually several times larger than the WEBP it came from, sometimes dramatically so at high resolutions. That is inherent to the format rather than a flaw in the conversion. If the result is too large for its destination, set a maximum width before converting and scale the output down while keeping the aspect ratio. Halving the width roughly quarters the uncompressed file size, so this is the most effective control available.
Everything runs in your browser, so files are decoded and encoded locally and never uploaded, stored, or watermarked. Batch conversion handles a whole folder in one pass with a single setting, results download individually or together in a ZIP archive, settings stay consistent across a whole folder, and there is no account to create or daily limit to watch.
32-Bit Output
The bitmap is written in 32-bit colour, so alpha data is retained.
Transparency Retained
Transparent WEBP sources keep their see-through areas in the output.
Batch Conversion
Convert a whole folder of images to BMP in a single pass.
Resize While Exporting
Set a maximum width to keep the uncompressed file size manageable.
Local Processing
Images are decoded and encoded in your browser, never uploaded anywhere.
No Limits
No account, no watermark, and no daily cap on how many files you convert.
FAQ
Frequently Asked Questions
Some desktop utilities, industrial applications, firmware tools, and legacy scripts only accept an uncompressed bitmap. Converting gives those programs a file they can read without a WEBP decoder, and it is also useful whenever a workflow needs pixels in a predictable uncompressed layout.
Yes. The output is a 32-bit bitmap, which supports an alpha channel, so transparent WEBP sources keep their see-through areas. Not every viewer displays BMP alpha, but the data is preserved.
BMP applies no compression, storing every pixel directly. Files are typically several times larger than the WEBP source, and much larger at high resolutions, which is inherent to the format.
Yes. Set a maximum width before converting and the bitmap is scaled to that width with the aspect ratio preserved. Smaller dimensions directly reduce the uncompressed file size, and reducing them is far more effective than any other option here.
The converter writes 32-bit BMP files with four channels per pixel, which is what allows the alpha channel to survive. Four channels means red, green, blue, and alpha for every pixel, and most modern software reads 32-bit bitmaps without difficulty.
Yes. Add a whole batch of images, convert them in one pass, and download the finished bitmaps individually or together in a single ZIP archive with the same settings applied.
No. Decoding and encoding both happen locally in your browser through the Canvas API, so files never leave your device and are never stored, logged, or analysed. Watching the network tab during a conversion confirms it.
Almost certainly, since the output is a standard Windows bitmap. Very old viewers that expect 24-bit bitmaps may not show transparency, though the image itself will still open, since only the transparency is ignored.
There is no fixed cap, no daily quota, and no account requirement. The practical ceiling is your own device memory, because uncompressed bitmaps consume far more space than the source.
No. The converter runs in an ordinary browser tab on desktop or mobile, with no plugin, no app, no registration, and no email address required before you convert. Open the page, add an image, and the bitmap downloads in seconds.