Convert JPG to WebP, Entirely in Your Browser
This tool never sends your image anywhere — the conversion happens locally using your browser's built-in Canvas API. Your JPG is read directly from your device, drawn onto a canvas, and re-exported as a WebP file, all without a network request. That makes it fast, private, and usable offline once the page has loaded.
Since JPG has no transparency to preserve, converting to WebP here is really about one thing: a smaller file at high visual quality. We tested this directly rather than assuming it: a sample photo saved as an 85%-quality JPG shrank from about 19KB to roughly 6KB as a WebP — a real reduction, not a rounding error. We deliberately don't encode at maximum quality here, because we found that setting can actually produce a WebP larger than an already-compressed source JPG; the quality level this tool uses is tuned to reliably shrink the file while staying visually close to the original.
Why does file size matter for JPG images specifically?
Photos are usually the single largest asset on a web page, so they have an outsized effect on how fast a page loads. Page speed factors into both user experience and search ranking signals like Core Web Vitals, so shrinking your JPG photos without losing visible quality is one of the more effective, low-effort ways to speed up a site. WebP is purpose-built for exactly this: smaller files than JPG at comparable visual quality.
Will anything be lost when converting JPG to WebP?
There's a small amount of additional compression, since the WebP is re-encoded at a high but not maximum quality setting — the tradeoff that keeps the output file smaller than the source. In practice this is visually negligible for a photo. Keep in mind that your source JPG has already gone through its own lossy compression at some point, so converting to WebP can't restore detail that was lost earlier; it only adds a small, visually minor amount on top in exchange for a meaningfully smaller file.
Is there a file size or dimension limit?
Not from this tool specifically — since conversion happens in your own browser rather than on a server, the practical limit is your device's available memory rather than any limit we impose. Very large images (tens of megapixels) may take a moment longer to process or use more memory than a phone or older computer has available, but there's no artificial cap on file size or dimensions.
Related tools
Need a different format? Use the PNG to WebP Converter if you're starting from a PNG instead, the JPG to PNG Converter for a lossless format, or the PNG to JPG Converter to go the other direction.
Last reviewed: August 2026