Product photo (1200×900)
- Input
- JPEG 85%: 320 KB
- Expected output
- WebP 85%: ~210 KB (−34%)
Equivalent visual quality. 110 KB less per image.
convert JPG to WebP online
Convert JPG to WebP online: gain performance without sacrificing quality
WebP was developed by Google specifically for the modern web. Compared to JPEG, it produces files 25–35% smaller with equivalent visual quality — which translates directly to faster pages, lower mobile data consumption and better Core Web Vitals scores. All modern browsers have supported WebP natively since 2020.
Continue in the tool
Open full toolMore pages for this tool
- Convert PNG to JPG online: what happens to transparency
- Convert WebP to JPG: instant compatibility without installing anything
- Convert PNG to JPG: reduce size without losing visible quality
- Convert JPG to PNG: lossless editing and transparency compositions
- Convert WebP to PNG: maximum quality and preserved transparency
- Convert PNG to WebP: preserved transparency with smaller file
How WebP impacts Core Web Vitals and SEO
- LCP (Largest Contentful Paint) measures the loading time of the largest visible element. For most sites, that element is a hero or product image. Reducing that image's weight by 30% can move LCP from "needs improvement" to "good" — without any infrastructure change.
- Google PageSpeed Insights explicitly recommends WebP in its "Serve images in next-gen formats" diagnostic. Using WebP directly resolves that recommendation and can contribute to improved ranking in mobile searches.
- The only real compatibility concern in 2024 is email. Gmail, Outlook and Apple Mail still have inconsistent WebP support in HTML emails. For images destined for email marketing, use JPEG.
JPEG vs WebP: real size difference
Landing page hero (1920×1080)
- Input
- JPEG 80%: 890 KB
- Expected output
- WebP 80%: ~580 KB (−35%)
Direct LCP reduction for users on slow connections.
Blog thumbnail (400×300)
- Input
- JPEG 80%: 45 KB
- Expected output
- WebP 80%: ~29 KB (−36%)
Small savings at high volume add up significantly in total page weight.
Full tool FAQ
Transparency is filled with white, because the JPEG format does not support an alpha channel. If you need to preserve transparency, convert to PNG or WebP. The tool automatically warns you when this situation occurs.
Frequently asked questions
Do all browsers support WebP?
Chrome, Firefox, Safari (since version 14, 2020), Edge and Opera support WebP. The only still-widely-used browser without native support is Internet Explorer, with less than 0.5% global market share. For modern public sites, WebP is safe.
Is WebP always better than JPEG?
Better at compression and size, but not universal compatibility. JPEG is read by virtually any software — from cameras to printers, from legacy systems to email clients. WebP is superior for web, but JPEG remains the safer choice for generic sharing and long-term storage.