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Guide — Image Formats

What Is a WebP File? The Complete Guide

WebP is one of the most widely used modern image formats on the web — smaller than JPG and PNG, with features neither offers on its own. This guide covers what WebP is, how it works, and when to convert it.

What Does WebP Stand For?

WebP stands for Web Picture format. Google developed it in 2010, building it on top of the VP8 video codec — the same compression technology Google used in its early WebM video format. The goal was a royalty-free image format that could replace JPG and PNG on the web with meaningfully smaller files at equivalent visual quality.

How WebP Compression Works

WebP supports two distinct compression modes. Lossy WebP discards some image data to shrink file size, typically producing files 25-35% smaller than JPG at the same quality level. Lossless WebP preserves every pixel exactly, usually landing around 25% smaller than an equivalent PNG.

Beyond compression, WebP also supports a full alpha channel for transparency and animation — combining what previously required separate formats (JPG for photos, PNG for transparency, GIF for animation) into one.

WebP vs JPG vs PNG vs AVIF

Here's how WebP stacks up against the other major image formats:

Feature WebP JPG PNG AVIF
Compression Lossy + Lossless Lossy Lossless Lossy + Lossless
Transparency Yes No Yes Yes
Animation Yes No No Yes
Browser Support Modern browsers Universal Universal Modern browsers
File Size Small Small Large Smallest
Best For Web images Photos Graphics Web delivery

WebP Compatibility: Where It Opens

Browser support for WebP is excellent and has been for years, but some desktop software and older devices still lag behind:

Platform WebP Support
Chrome 17+ Full native support
Firefox 65+ Full native support
Safari 14+ (macOS / iOS) Full native support
Edge 18+ Full native support
Internet Explorer No support
Photoshop Plugin needed (older versions)
Older Android apps Inconsistent — varies by app

When to Convert WebP

Convert a WebP file when you need to share it by email, attach it in software that doesn't recognize the format, or upload it to a platform that only whitelists .jpg, .jpeg, or .png. Converting to a more universal format guarantees it opens wherever it's sent.

Our WebP to JPG converter and WebP to GIF converter run entirely in your browser — drop in a file and download the converted result in seconds, with nothing uploaded to a server.

Related Tools

WebP to JPG

Convert WebP to universally compatible JPG.

 WebP to GIF

Convert WebP images into shareable GIFs.

 GIF to WebP

Convert GIFs into smaller, modern WebP files.

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Frequently Asked Questions

What is WebP?

WebP is an image format developed by Google in 2010, built on the VP8 video codec. It's a royalty-free alternative to JPG and PNG that produces smaller files while supporting both lossy and lossless compression, transparency, and animation in a single format.

Is WebP better than JPG?

For file size, yes — WebP's lossy mode typically produces files 25-35% smaller than JPG at the same visual quality. WebP also supports transparency, which JPG lacks entirely. The trade-off is older software and some platforms still don't accept WebP uploads.

Can all browsers open WebP?

All modern browsers — Chrome, Firefox, Safari, and Edge — support WebP natively. The exception is legacy software like Internet Explorer and some older desktop image editors, which need a plugin or a converted file to open it.

Does WebP support transparency?

Yes. WebP supports a full alpha channel in both its lossy and lossless modes, similar to PNG. This makes it suitable for logos, icons, and graphics that need a transparent background, while still keeping file sizes small.

Why can't I open a WebP file?

This usually happens with older photo editors, some email clients, or upload forms that only whitelist .jpg and .png. Converting the WebP file to JPG or PNG resolves the issue immediately, since both formats are accepted everywhere.