Image Format Converter

The Image Format Converter switches an image between PNG, JPEG, WebP and AVIF entirely in your browser — pick a target format, adjust quality if the format supports it, and download the result. It's the tool for the moment a platform, plugin or CMS insists on a specific file type: a WordPress theme that only accepts JPEG, a design tool that needs a transparent PNG, or a modern site that wants WebP or AVIF for faster page loads.

Each format trades off differently. PNG is lossless and supports transparency, which makes it the right choice for screenshots, logos and graphics with sharp edges or flat color, but it produces much larger files for photographs. JPEG compresses photographic detail well and is universally supported, though it has no transparency and always shows some compression artifacting. WebP generally beats JPEG by 25–35% at equivalent visual quality with full modern browser support, and AVIF pushes compression further still — often the smallest file for a given quality level — at the cost of being the newest format with the narrowest (though still solid) encoder support in browsers.

Conversion happens by decoding the source image and re-encoding it with the canvas API's `toBlob()`, entirely on your device — nothing is uploaded, so private or unpublished images never leave your browser. Because the browser itself does the encoding, this tool can only produce formats the visiting browser actually supports; if AVIF encoding isn't available (rare in current Chrome, Firefox and Edge, but possible on older browsers), the tool tells you rather than silently handing back the wrong format.

One thing worth knowing: converting to JPEG always drops transparency, filling any transparent areas with white, so a logo with a transparent background should go to PNG or WebP instead. And because compression is lossy for JPEG/WebP/AVIF, repeatedly round-tripping the same image through multiple lossy formats will compound quality loss — keep a PNG or original master file if you expect to convert it again later.