How to convert BMP to WebP
- Click Choose files or drop your BMP images into the box above — up to 10 at a time on the free plan.
- Optionally set the quality, or switch on lossless mode.
- Conversion starts right away. Download each WebP file, or click Download all to get them as one ZIP.
BMP vs WebP
| BMP | WebP | |
|---|---|---|
| Compression | Uncompressed | Lossy or lossless |
| Transparency | No | Yes |
| Animation | No | Yes |
| Colors | Usually 24-bit color, stored uncompressed | 8 bits per channel, full alpha |
| File size (photos) | Very large | Very small |
| Opens on | Windows and most image viewers; rarely accepted on the web | All modern browsers (Chrome, Edge, Firefox, Safari 14+); some older apps and editors cannot open it |
| Best for | Old Windows software, embedded devices and tools that need raw pixels | Images on websites, where smaller files mean faster pages |
About BMP and WebP
What is BMP?
BMP is an old Windows format that usually stores every pixel uncompressed. A photo saved as BMP can be 10–20 times larger than the same JPG. Today it is mostly needed for legacy software, some printers, industrial machines and microcontroller displays.
- Simple, uncompressed and lossless
- Readable by old and embedded software
- Enormous files
- No useful transparency or metadata
- Not accepted by most websites
What is WebP?
WebP was created by Google to make web pages load faster. Lossy WebP is typically 25–35% smaller than a JPG of similar quality, and lossless WebP is about a quarter smaller than PNG. It also supports transparency and animation. Many websites now serve WebP automatically, which is why images you download often end up as .webp files that older software refuses to open.
- Much smaller than JPG and PNG
- Transparency and animation
- Lossy and lossless modes
- Not accepted by some upload forms, print shops and older apps
- Windows Photo Viewer and older Photoshop versions cannot open it
Why GlideConvert?
- Private by design. Your files are converted on your own device by your browser — they are never uploaded to a server. That keeps them private, avoids upload waits and means there is no queue.
- Fast. Images convert in a fraction of a second; video uses your device’s hardware encoder.
- Free. No sign-up, no watermark. 10 images, 5 audio files or one video at a time — Pro lifts the limits and removes ads.
Frequently asked questions
Will converting BMP to WebP reduce quality?
WebP uses lossy compression, but at the default quality of 90% the difference is practically invisible. Move the quality slider down for smaller files, or up to 100% for the best possible result.
Will the WebP file be smaller than the BMP?
Usually yes — WebP compresses photos more efficiently than BMP. The exact saving depends on the image and the quality you choose.
Can I convert several BMP images at once?
Yes. The free plan handles 10 images at a time, and you can download everything as a single ZIP. Pro removes the batch limit, converts files in parallel and supports files up to 4 GB.
Are my files uploaded to a server?
No. GlideConvert runs entirely in your browser: images are processed with the browser’s built-in codecs and WebAssembly, video and audio with hardware-accelerated WebCodecs (or a WebAssembly build of FFmpeg for older formats). Nothing is sent anywhere — you can even disconnect from the internet once the page has loaded.
Does it work on iPhone, Android, Mac and Windows?
Yes. It works in any up-to-date browser — Chrome, Edge, Safari, Firefox or Samsung Internet — on phones, tablets and computers, with nothing to install. On phones, extremely large images may be scaled down to fit within the browser’s memory limit; you will see a note if that happens.