JPG to WebP Converter
Convert JPG photos to WebP for smaller pages and faster Core Web Vitals scores.
Up to 50 MB per file. Sign up free to convert files up to 100 MB.
| File name | Size | Convert to |
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Checking files and selected output formats.
What to expect when converting JPG to WEBP
A 1 MB JPG typically becomes 650 – 750 KB as WebP at equivalent visual quality.
Quality: Lossy, at equivalent quality settings, WebP produces a smaller file than JPG with fewer visible compression artifacts (especially on gradients and skin tones).
Best for: modern websites, saves bandwidth, faster page loads, better Core Web Vitals.
Avoid when: you need maximum compatibility (email, older photo viewers, social media uploads with strict format rules).
Tip: WebP is the dominant modern web format. Convert images destined for your own site to WebP; keep JPG for everything you might send to someone else.
JPG to WEBP - Web performance - the Core Web Vitals conversion
WebP carries the same visual quality at 25-35% less weight, which is the saving behind the "serve images in next-gen formats" warning in PageSpeed Insights, Lighthouse and Core Web Vitals. Every modern browser supports it. Catalogue photos, blog hero images and portfolio work are where the gain actually shows up in a score. Serve WebP to modern browsers and keep a JPG fallback in a <picture> element for older ones.
JPG to WebP: measurable web performance gains
WebP uses the VP8 codec (from the WebM video format) adapted for still images. At equivalent SSIM scores, WebP produces files 25-35% smaller than JPG. Google developed WebP specifically to reduce image bandwidth on the web. The conversion decodes the JPG's DCT-compressed data and re-encodes with VP8's prediction-based compression. Since both formats are lossy, one additional generation of compression occurs, at quality 80+, this is imperceptible.
Convert JPG to WebP for web delivery to reduce bandwidth and improve page load speed. Serving WebP images is one of Google PageSpeed Insights' specific recommendations. For non-web use (printing, archival, sharing), JPG's universal compatibility makes conversion unnecessary.
JPG vs WebP: Side-by-side
Technical comparison of the two formats, useful for deciding which to use, or for confirming what changes during conversion.
| Property | JPG | WebP |
|---|---|---|
| Full name | JPEG (Joint Photographic Experts Group) | WebP (Google) |
| Year introduced | 1992 | 2010 |
| Developer / standard body | JPEG Committee | |
| MIME type | image/jpeg | image/webp |
| File extension | .jpg / .jpeg | .webp |
| Compression | Lossy (DCT-based) | Lossy or lossless (VP8/VP8L) |
| Color / data depth | 24-bit truecolor | 24-bit + 8-bit alpha |
| Max dimensions / size | 65,535 × 65,535 px | 16,383 × 16,383 px |
| Transparency | No | Yes |
| Animation | No | Yes |
| Standard / specification | ISO/IEC 10918 | RFC 9649 (lossless), RFC 6386 (VP8) |
| Best for | Photos, web images, email attachments | Modern web, 25–35% smaller than JPG/PNG at equivalent quality |
Use JPG when
- You need something that opens on every device without question
- The image will pass through email, WhatsApp, or systems that re-encode
- You're preparing for print or a colour-managed workflow
- CPU cost of conversion matters (batch of thousands)
Use WebP when
- The image is for a modern website you control
- Page-weight and Core Web Vitals matter
- You want transparency in a photograph-quality output
- You want a single format that can replace both JPG and PNG for delivery
For a website you control, WebP is the modern default, smaller files, better quality, transparency support. For anything that leaves your control (email attachments, third-party uploads, print prep), JPG remains the safe bet. Most sites end up serving WebP with a JPG fallback via the HTML picture element.