Convert JPG to WebP — free, no upload
Convert JPG images to WebP directly in your browser. No upload, no server. WebP files are typically 25–35% smaller than JPG at comparable quality.
Tips & notes
Frequently asked
Do I lose quality during conversion? +
At quality 80–90% the difference is barely perceptible. WebP uses a more efficient algorithm than JPEG, so quality is often even better at a smaller file size.
Does WebP work in every browser? +
Yes — Chrome, Firefox, Safari (since 2020), Edge and Opera all support WebP. Global coverage: above 96%.
Can I undo the conversion? +
Since WebP is lossy, keep the original JPG. Converting WebP back to JPG is possible but the original quality can't be restored.
About this tool
In shortConvert JPG to WebP — 25–35% smaller files at identical perception, locally in your browser.
Converting JPG to WebP is one of the most impactful web performance optimizations available — and the easiest to apply. WebP was released by Google in 2010 and is based on VP8 video codec technology. At comparable perceptual quality, WebP files are typically 25–35% smaller than equivalent JPGs. For photo content this is one of the biggest single-step optimizations you can make on a website. Concrete impact. A typical WordPress site with 1 MB of image weight per page view shrinks to around 700 KB with JPG→WebP conversion. That improves the Largest Contentful Paint (LCP) — Google's most important Core Web Vitals metric — by 200–400 milliseconds. On a 4G mobile connection this can mean the difference between "green LCP" (good) and "red LCP" (ranking penalty). Browser support in 2026. Universal: Chrome since 2010, Firefox since 2019, Safari since Big Sur (2020), Edge since 2020 (Chromium-based). Practically every browser still in use can render WebP. Serving classic JPG only in 2026 brings no compatibility upside — just a larger file. Quality choice. Pick freely. Sweet spot for photo content is 72–80. For "as small as possible with invisible loss" set 75. For skin tones or gradients go up to 80. WebP tolerates low quality values better than JPG — block artifacts only become visible at much lower quality steps. What you keep. Unlike the opposite direction (PNG→JPG), JPG→WebP loses no properties. WebP can do everything JPG can — and more: transparency, animation, both lossy and lossless modes. Re-encoding awareness. Both formats are lossy. Converting an already heavily compressed JPG to WebP means two lossy passes back-to-back. At normal quality levels (JPG source at 80+, WebP output at 75+) the loss is visually undetectable. With an extreme JPG (quality 50 or lower), the WebP output will be visibly worse than the original — no WebP magic recovers lost information. Multiple files. Drop any number of JPGs into the converter at once. For 50+ images we recommend the Multi-Format Compare instead — it also shows AVIF, which is often another 30–50% smaller. When is conversion not the optimal solution? Three scenarios: when sending to technically-inexperienced recipients with older software; for print pipelines (printers often reject WebP); for Open-Graph social-media previews (some crawlers still mishandle WebP). Privacy. Like all JNRT Pixel tools, this converter runs entirely in your browser. No upload. Related: WebP — the complete guide, image compression for web 2026, PNG vs. WebP.