WebP Compressor & Converter

Why compress and convert to WebP?

WebP is a modern image format built specifically for the web, and switching to it is one of the easiest ways to make a site faster without sacrificing how images look. A WebP file is typically 25–35% smaller than an equivalent JPEG and far smaller than a comparable PNG, which means quicker page loads, lower bandwidth bills, and a better experience for visitors on slow or metered mobile connections.

This tool does double duty. If you already have WebP images, it re-encodes them at your chosen quality to squeeze out extra savings. If you have JPEGs, PNGs, AVIFs or GIFs, it converts them to WebP so you can modernize an entire folder of assets at once. Because everything runs on your device with a WebAssembly encoder, your images are never uploaded — a genuinely private alternative to server-based converters that send your photos off to a remote machine.

Lossy vs lossless WebP, and quality

WebP supports two distinct compression modes, and choosing the right one matters. Lossy WebP works like JPEG: it permanently discards detail the eye is least likely to notice, which yields very small files. It is the right choice for photographs and rich, continuous-tone imagery. The quality slider controls how aggressive this is — higher values keep more detail at a larger size, lower values save more space but can introduce visible artifacts.

Lossless WebP, by contrast, reproduces every pixel exactly, with no artifacts at all. It is the better pick for logos, icons, screenshots, and flat-color graphics or text — the same cases where you would normally reach for PNG, except WebP usually produces a smaller file. For most photographs a lossy quality of 75–85 is the sweet spot: visually identical to the original at normal viewing sizes, yet a fraction of the size. Keep in mind that lossy compression is cumulative, so always convert from your highest-quality original rather than from an already-compressed copy.

What is WebP, and when should you use it?

WebP was developed by Google and combines lossy compression derived from the VP8 video codec with an efficient lossless mode. Beyond raw size, it supports two features that older formats handle awkwardly: transparency (an alpha channel, like PNG) and animation (like GIF, but dramatically smaller). That combination lets a single format replace JPEG, PNG and animated GIF in many situations. You can read the technical overview on MDN’s image format reference and a practical guide to adopting it on web.dev.

Browser support is now effectively universal — every current version of Chrome, Firefox, Safari and Edge renders WebP — so it is safe to use across the modern web. If you need to support very old browsers, keep a JPEG or PNG fallback. And when you want the absolute smallest files and can accept slower encoding, AVIF often beats WebP; compare the two on your own images. To go the other direction, or to switch between several formats at once, use our image converter, and if your sources are photographs you may also want our dedicated JPEG compressor.

Tips for the best WebP results

• Match the mode to the content. Use lossy WebP for photos and lossless WebP for logos, screenshots, and flat graphics with sharp edges.
• Resize before you encode.If an image will display at 1200px wide, there’s no reason to ship a 6000px file. The built-in resize option saves far more than quality alone.
• Preserve transparency on purpose. Converting a transparent PNG to WebP keeps the alpha channel — but flattening it to JPEG would not. Choose WebP when transparency matters.
• Compare against AVIF.For hero images and large photos, re-run the same file through AVIF and pick whichever gives the smaller size at a quality you’re happy with.
• Batch by content type. Group your photos together and your graphics together so each set can use a single, ideal quality setting in one pass.