WebP to BMP Converter: Free, Private, No Upload

Convert WebP files to BMP in your browser. Lossless output, batch up to 20 files at once, no upload, no account, no watermark. Your files never leave your device.

WebP to BMP
Batch up to 20 files
No upload, no account
Metadata stripped

1Add up to 20 images
2Pick from 18 formats
3Download or copy the code

Processed on your device. Your images are never uploaded, and metadata is stripped. How we keep it private

How do I convert WebP to BMP for free?

Drop your WebP files into the tool above, choose BMP as output, and download the result. Everything runs in your browser, so nothing is uploaded and there is no limit or watermark. It works on Windows, Mac, Linux, ChromeOS, iOS and Android — anywhere you have a modern browser.

Price: Free, no credits and no daily cap
Account required: No
File uploaded to server: No, processed locally in your browser
Batch limit: Up to 20 files at once
Input format: WebP
Output format: BMP
Best for: BMP workflows, lossless quality, editing, printing
Works on: Chrome, Edge, Firefox, Safari, iOS and Android browsers
Privacy: No upload, no tracking, metadata stripped
Output quality: Lossless, exact pixels

How to convert WebP to BMP

1
Drop your WebP files
Drag up to 20 WebP files onto the page or click to choose them. Everything runs in your browser.
2
BMP is preselected
Output is already set to BMP. Adjust quality, resize or batch if you want.
3
Download
Save each BMP, or download all of them together as a ZIP.

WebP to BMP: what changes and when it makes sense

WebP is a WebP format, developed by Google. It is best known for smaller files than JPG and PNG at similar quality, with transparency and animation in one format. The main drawbacks are rejection by some upload forms, older editors and email clients, and no wide-gamut or HDR support.

BMP is a Bitmap image format. It is best known for a simple structure that legacy programs and embedded systems can read without a decoder library. The main drawbacks are enormous files and no reliable transparency.

WebP vs BMP at a glance

Property	WebP	BMP
Type	Raster image	Raster image
Compression	Lossy (VP8) or lossless, chosen per file	Usually uncompressed (run-length encoding exists but is rare)
Transparency	Full alpha channel with soft edges	None
Animation	Yes	No
Colour depth	8 bits per channel	1 to 32 bits per pixel
Support	Supported by current Chrome, Edge, Firefox, Safari and Opera, but not by every older editor, office suite or upload form	Opens in browsers and most desktop software, but almost never used on the web
History	Announced by Google in September 2010, based on the VP8 codec acquired with On2 Technologies. First format to combine lossy, lossless, alpha and animation in one specification. Safari support arrived in 2020 with macOS 11.	Created by Microsoft for Windows 1.0 in 1985 as the native bitmap format for the Windows Graphics Device Interface. The "BM" signature has been unchanged since then. Still used in embedded systems and legacy Windows software.

What actually changes in this conversion

WebP can be lossy or lossless. If your file was saved lossy, converting to BMP stops further loss but does not restore detail.
BMP cannot store transparency, so transparent areas are filled with white.
WebP can hold animation, but BMP cannot, so the result is a single still frame.
Expect the BMP file to be far larger than the WebP source.
EXIF, GPS and camera data are stripped on every conversion. That is good for privacy, but you lose capture dates.

About WebP: history and technical details

Announced by Google in September 2010, based on the VP8 codec acquired with On2 Technologies. First format to combine lossy, lossless, alpha and animation in one specification. Safari support arrived in 2020 with macOS 11.

Technical: Lossy WebP uses VP8 intra-frame coding with 4x4 and 16x16 block prediction. Lossless WebP uses a new algorithm with colour cache and LZ77 backward references. Max dimensions 16,383 by 16,383.

Real-world size: Lossy WebP at quality 80 is typically 25-35% smaller than JPG at quality 85 for photographs. Lossless WebP is 20-30% smaller than PNG for graphics. Google reports 80% savings on some assets after switching to WebP.

Popular tools: Google Chrome (built-in encoder), cwebp, Squoosh, ImageMagick, Adobe Photoshop 2020+, Figma, WordPress (via plugin).

Alternatives: AVIF (30-50% smaller but slower to encode), JPG (universally accepted), PNG (lossless), HEIC (Apple ecosystem).

About BMP: what you get

Created by Microsoft for Windows 1.0 in 1985 as the native bitmap format for the Windows Graphics Device Interface. The "BM" signature has been unchanged since then. Still used in embedded systems and legacy Windows software.

Technical: File header 14 bytes (signature, size, reserved, offset) followed by DIB header (40+ bytes). Supports 1, 4, 8, 16, 24, 32-bit pixels. Rows padded to 4-byte boundaries. Pixels can be stored bottom-up or top-down. Optional RLE4/RLE8 rarely used.

Real-world size: A 12-megapixel photo is 36 MB as 24-bit BMP. As JPG it is 2-4 MB (90% smaller). A 1920x1080 screen at 32-bit BMP is 8.3 MB; as PNG 200-600 KB.

Popular tools: Windows Paint, IrfanView, XnView, ImageMagick, GIMP, Adobe Photoshop, embedded dev tools.

Alternatives: PNG (lossless, 5-20x smaller), TGA (game pipelines), TIFF (professional print), JPG (lossy, much smaller).

Browser and software compatibility

WebP: Supported by current Chrome, Edge, Firefox, Safari and Opera, but not by every older editor, office suite or upload form. BMP: Opens in browsers and most desktop software, but almost never used on the web.

BMP output opens in browsers and most desktop software, but very few web workflows expect it.

Why people move away from WebP

Some CMS uploaders, marketplaces, print shops and older editors do not accept WebP.
Saving an image from a website often leaves you with a WebP that Office documents and older viewers will not open.
WebP has no HDR or wide-gamut support, so AVIF is the better choice for those images.

Why people choose BMP

Some legacy Windows software, embedded displays and industrial tools only read BMP.
With no compression there is no decoding step and no compression artefacts.

Common mistakes with WebP

Re-converting a WebP that was already made from JPG — stacks two rounds of lossy compression
Serving WebP without a JPG fallback for very old Safari (pre-2020)
Expecting WebP to open in older Office versions — it will not

Best practices for keeping quality

If your WebP was originally made from a JPG or PNG, convert from the original instead. Going from lossy WebP to another lossy format stacks two rounds of compression.
Expect a very large file. Check the upload limit and free disk space before saving.
Flatten any transparency first. BMP does not reliably carry an alpha channel.
Resize before converting if the image will be shown small. A 4000 pixel photo displayed at 800 pixels wastes bytes in any format.
Check the result at 100 percent zoom, especially around text, edges and gradients, before you replace any originals.
Keep your original files. Conversions to a lossy format cannot be undone.
When you convert a set of images, use the same quality setting for the whole batch. The converter handles up to 20 files at once.

WebP to BMP questions

Quick answers about privacy, quality, supported formats, file limits and how BMP works.

Why convert WebP to BMP?

BMP is lossless. It keeps every pixel exactly. It is the safe choice when you plan to edit, print or need exact pixel data.

Will converting WebP to BMP lose quality?

No. BMP is lossless, so nothing is thrown away.

Does BMP keep transparency?

No. BMP does not support transparency. Transparent areas will be filled with white.

Are my files uploaded?

Never. Everything runs in your browser. Your files never leave your device. Open DevTools Network tab while processing — you will see no upload request.

Can I convert many files at once?

Yes, up to 20 files at once. Download them individually or all together as a ZIP.

Does the converter strip metadata?

Yes. Browsers do not pass EXIF data through a canvas, so GPS, camera model and dates are removed on every conversion. That is good for privacy.

Is it free?

Yes. No credits, no daily cap, no account, no watermark. The practical limit is your device memory.

Why is BMP so large?

Because it stores raw pixel data with little or no compression. A 12-MP photo as 24-bit BMP is 36 MB, compared to 2-4 MB as JPG. The tradeoff is speed (no decoding needed) and lossless quality.

Your files never leave your device

No upload, no account, no tracking. Everything happens in your browser using the Canvas API and WebAssembly. You can confirm this in your browser's DevTools Network tab while the tool runs — no request carries your file. See why ToolDeck is different.