Convert images into modern WEBP format.
WEBP Converter re-encodes your images into the modern WEBP format for significantly smaller file sizes without visible quality loss. It is completely free, browser-based, and requires no account or file uploads to a server.
WEBP Converter is a client-side tool that transforms JPG, PNG, AVIF, or GIF images into Google's WEBP format. WEBP delivers substantially smaller files compared to traditional JPEG and PNG at equivalent visual quality, making it the preferred format for fast-loading websites and progressive web apps. The conversion runs entirely in your browser using the native canvas API, ensuring your images remain private. You control the output quality through an intuitive slider so you can fine-tune the size-to-quality trade-off.
Upload a source image using the file input. Adjust the quality slider to set compression strength -- values between 80 and 90 provide an excellent balance of small file size and sharp visual output. Click Convert to process the image on a local canvas, then inspect the preview to verify quality. When ready, click Download WEBP to save the converted file directly to your device. No server round-trip occurs at any point, so the conversion is nearly instant for typical web images.
WEBP has achieved broad browser support since 2020 and is now a mainstream web image format. All major modern browsers support WEBP: Google Chrome (version 32+), Mozilla Firefox (version 65+), Microsoft Edge (version 18+), and Apple Safari (version 14+ on macOS 11 Big Sur and iOS 14). Opera has supported WEBP since 2012. The notable exception is Internet Explorer, which has no WEBP support — but Internet Explorer has an extremely small and rapidly declining share of internet traffic in 2024. For websites targeting audiences that include any users on Internet Explorer or very old browser versions, use the HTML picture element to specify WEBP as the preferred source with a JPG or PNG fallback. For websites confident their visitors use modern browsers exclusively — such as developer tools, B2B software platforms, and mobile-first applications — serving WEBP without fallback is generally acceptable. Check your site's analytics to see what browsers your actual visitors use before making the decision.
Google's studies and independent benchmarks consistently show that WEBP achieves 25% to 35% smaller file sizes than JPEG at equivalent visual quality, and 26% smaller files than PNG. In practice, the size advantage varies by image content. For photographic images with complex color and detail, WEBP typically delivers 25% to 40% smaller files than JPEG at the same perceived quality. For images with flat color areas, text, and geometric shapes, WEBP often outperforms PNG by a similar margin while maintaining the option for lossless encoding. For animated images, WEBP animations are significantly smaller than GIF files — often 64% to 80% smaller — making WEBP an important format for replacing animated GIFs on websites. The actual savings depend heavily on the content and quality settings chosen, so test with your own images rather than relying solely on average figures.
Yes. All image processing in the WEBP Converter happens entirely within your browser using the built-in HTML canvas API. Your image files are never uploaded to Popupnote.com's servers or transmitted anywhere over the network. The conversion is performed locally on your device, and the resulting WEBP file is downloaded directly from the browser to your local storage. No images, metadata, or usage data are logged. You can convert confidential or personal images without concern about data exposure.