JPG → WebP

This free online JPG to WebP converter does the specific conversion behind one of the easiest wins for a faster website — turning a folder of JPGs into WebP, in batches — and adds something a plain converter doesn't offer: a magnifier button on every file that opens a drag-to-compare slider against the original, so you can actually see the quality trade-off at 100% zoom instead of taking the file-size savings on faith.

WebP is Google's modern image format, and it consistently produces smaller files than JPG at a visually comparable quality — commonly 25-35% smaller for ordinary photos. Since image weight is one of the biggest contributors to slow page loads, and Google's Core Web Vitals (a direct ranking factor) reward faster pages, converting product photos, blog images and banners from JPG to WebP before uploading is one of the simplest, highest-leverage things you can do for both page speed and search ranking — no design changes required, just lighter files doing the same job.

The trouble with most converters is that "smaller file" and "looks the same" are two different claims, and only one of them is easy to verify at a glance. This tool lets you check the second one directly: tap the magnifier on any file in the batch and a before/after slider opens right there, letting you drag across fine detail — text, skin, fabric texture — to confirm the WebP version holds up at your chosen quality before you commit to a download. If it doesn't, adjust the quality slider and the comparison updates live.

Every conversion and every comparison happens locally in your browser using the HTML canvas API — nothing is ever uploaded to a server, so it's instant, works identically on a phone or a laptop, and is completely private.