Checking popular online format converters directly: CloudConvert's free tier caps daily conversions (currently around 10–25 a day) and limits how many files run at once, while Convertio uploads every file to a server before converting it — your original leaves your device even for a routine PNG-to-WebP swap. Squoosh avoids the upload but only handles one image at a time with no side-by-side format comparison built in.
Image format converter online, with no upload step
This tool re-encodes the image using the browser's own Canvas API. The file never leaves your device — there's no server round trip and no daily conversion cap to run into.
PNG to WebP converter, no upload required
WebP typically cuts file size by 25–35% versus PNG for photos while keeping full transparency support for logos and screenshots. Switch the output format and the new file size updates immediately so you can see the difference before downloading.
Convert JPG to AVIF online — when your browser supports it
AVIF compresses further than WebP in most cases, but not every browser can encode it yet. This tool actually tests AVIF encoding support on load — if it's not available, the AVIF option is hidden automatically instead of producing a broken download.
WebP to PNG converter in the browser
Converting the other direction works the same way — useful when a downstream tool or CMS still expects a PNG input.
AVIF vs WebP vs JPG file size, compared live
Rather than relying on a general benchmark, switch formats and see the exact size difference for your own image — compression results vary a lot by image content (flat graphics vs. photos).
