Images are usually the heaviest thing on a web page, and heavy pages are slow pages. One of the easiest wins for site speed is switching your JPGs to WebP — a modern format that's meaningfully smaller at the same visual quality.
This guide explains what WebP is, how much you save, and how to convert JPG to WebP privately.
What Is WebP?
WebP is an image format developed by Google specifically for the web. It compresses photos more efficiently than JPG, typically producing files 25% to 35% smaller at the same quality. Smaller images mean faster page loads, less bandwidth, and better Core Web Vitals scores — all of which matter for both users and search rankings.
Is WebP Widely Supported?
Yes. Every current browser — Chrome, Edge, Firefox, and Safari — has supported WebP for years. For a website, you can serve WebP with confidence. The main place WebP still causes friction is older desktop software and some upload forms, which is a reason to keep JPG originals rather than a reason to avoid WebP on the web.
When to Convert JPG to WebP
- Website and blog images — the clearest win; smaller files, faster pages.
- App and CMS uploads — anywhere modern that accepts WebP.
- Reducing bandwidth — large image galleries load quicker and cost less to serve.
Keep JPG when you're sending photos to someone on older software, or uploading to a form that only takes JPG or PNG.
How to Convert JPG to WebP in Your Browser
Many converters upload your images to a server first. If you're preparing a batch of site images, that's slow and unnecessary — the conversion can happen on your own device.
The Unfuss JPG to WebP converter runs in your browser and never uploads your files.
- Open the JPG to WebP tool.
- Drop your JPGs in — as many as you like.
- Choose a quality (80% is a good default for the web).
- Download each WebP, or grab them all as a ZIP.
Getting the Quality Right
WebP quality works like JPG: lower numbers mean smaller files and more compression. For web images, 75–85% is the sweet spot — a big size reduction with no visible loss. Push higher only when detail is critical.
Need to go the other direction? Use WebP to JPG for compatibility, or WebP to PNG when you need lossless output with transparency.
Frequently Asked Questions
Can I convert JPG to WebP without uploading the files?
Yes. Browser-based tools like Unfuss convert the images on your own device, so nothing is sent to a server.
How much smaller is WebP than JPG?
Usually 25% to 35% smaller at the same visual quality, though the exact saving depends on the image.
Do all browsers support WebP?
Yes. Every modern browser — Chrome, Edge, Firefox, and Safari — supports WebP.
Will converting to WebP lose quality?
At a sensible quality like 80%, the difference is invisible while the file is much smaller. Only very low quality settings show artefacts.
Final Thoughts
Switching your web images from JPG to WebP is one of the simplest speed improvements you can make — smaller files, faster pages, and full support across modern browsers.
Convert privately in your browser with the Unfuss JPG to WebP converter, which keeps your images on your device while it works.