Speed up your Web.
Convert PNG & JPG to professional WebP in milliseconds. No uploads. No servers. Just speed.
Drop your images here
Supports JPG, PNG, HEIC
How It Works
FastWebP uses your browser's built-in Canvas API to convert images directly on your device — no internet connection required after the page loads.
Drop your images
Drag and drop JPG, PNG, or HEIC files — or click to browse. Upload as many as you need at once.
Instant conversion
Your browser converts each image to WebP locally using the Canvas API. No waiting for uploads or server processing.
Download & ship
Download files individually or grab everything as a ZIP. Use them on your website, app, or anywhere WebP is supported.
Why Convert to WebP?
WebP is the modern image format built for the web. Switching from PNG and JPG to WebP is one of the highest-impact performance improvements you can make.
25–80% smaller file sizes
WebP images are dramatically smaller than PNG and JPG equivalents, reducing page load times without sacrificing visual quality.
Better Google rankings
Google's Core Web Vitals measure page speed. Smaller images improve LCP (Largest Contentful Paint), which directly affects your SEO score.
Universal browser support
WebP is supported by all modern browsers including Chrome, Safari, Firefox, and Edge — covering over 97% of global web users.
Transparency support
Unlike JPG, WebP supports transparent backgrounds just like PNG — but at a fraction of the file size.
Your images never leave your device.
Most online converters upload your files to their servers — your images pass through unknown infrastructure, get stored temporarily (or permanently), and you have no control over what happens to them.
FastWebP is different. Every conversion happens locally in your browser using the Canvas API. We have no server, no storage, and no access to your files. Not even the filename leaves your device.
Frequently Asked Questions
Everything you need to know about FastWebP.
Are my images uploaded to a server?
Never. FastWebP runs entirely in your browser using the Canvas API. Your images are processed locally on your device and are never sent to any server. We don't even have a backend to receive them.
Is FastWebP completely free?
Yes, FastWebP is 100% free with no hidden limits. There are no file size restrictions, no watermarks, no account required, and no daily conversion caps.
What image formats does FastWebP support?
FastWebP supports JPG, PNG, and HEIC image formats. You can convert multiple files at once and download them all as a single ZIP file.
Why should I convert images to WebP?
WebP images are significantly smaller than JPG or PNG files — often 25–80% smaller — without any visible quality loss. Smaller images mean faster websites, better Core Web Vitals scores, and improved Google rankings.
Does it work on mobile?
Yes. FastWebP works on any modern browser including Chrome, Safari, Firefox, and Edge on both desktop and mobile devices.
Is there a file size limit?
No. Since your images never leave your browser, there's no server-side file size restriction. The only limit is your device's available memory.
How is FastWebP different from other WebP converters?
Most online converters upload your images to their servers, which raises privacy concerns and introduces upload/download delays. FastWebP converts everything locally in your browser — your files stay on your device, conversion is instant, and it works offline.
Can I convert multiple images at once?
Yes. Drop as many images as you want at once. FastWebP processes them in parallel and lets you download all converted files as a single ZIP archive.