How to Convert Images to WebP (and When You Shouldn't)

WebP can shave a third off your image sizes with no visible quality loss, which is why it's everywhere. But converting isn't always the right move. Here's how to do it well and when to skip it.

Why convert to WebP at all

WebP compresses more efficiently than both JPG and PNG while supporting transparency and both lossy and lossless modes. For anything living on the web — a personal site, a portfolio, a store — smaller images mean faster pages, better search rankings, and less bandwidth. Converting a folder of JPGs and PNGs to WebP is one of the easiest performance wins available.

How to convert

You have three broad options:

• In the browser. Tools that convert locally re-encode the file on your machine without uploading it. This is the fastest route for a handful of images and keeps them private.
• Image editors. Most modern editors export WebP directly via "Save as" or "Export."
• Command line. Google's cwebp utility converts in bulk and exposes every setting, ideal for developers automating a build.

Whichever you use, the setting that matters is quality for lossy WebP. Around 80–90% is the sweet spot — visually indistinguishable from the original for most images, with a big size saving. Lossless WebP is available too, and is the better pick for graphics with sharp edges.

Batch converting

If you're converting many images — say, everything you just downloaded from a page — do it in one pass. A batch tool applies the same format and quality to every file at once, which is far faster than exporting them individually. When you download images with an extension, choosing WebP as the output format converts everything on the way down, so there's no separate conversion step at all.

When not to convert to WebP

WebP isn't always the answer:

• Sending to older software. Some legacy apps and editors still don't open WebP. For a file you're emailing to a client, JPG or PNG is safer.
• Print workflows. Print pipelines often expect TIFF or high-quality JPG; WebP has little role there.
• Archiving masters. For your master copy, keep the original lossless file. WebP is a delivery format, not an archival one.
• Tiny images. For a 2 KB icon, the savings are negligible and PNG may compress it just as well.

Does converting change resolution?

No. Converting between formats changes how the image is encoded and how big the file is — not how many pixels it contains. A blurry image converted to WebP is still blurry, just smaller on disk. If sharpness is the problem, you need the original or an upscale, not a format change. For the full picture on choosing formats, see our WebP vs PNG vs JPG comparison.

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WebP is the right default for images headed to the web: convert at 80–90% quality, batch it when you can, keep an original, and fall back to JPG or PNG only when compatibility demands it.