About this conversion
Drop in an image, pick WebP or JPG as the output format, and drag the quality slider until the estimated file size looks right -- you’ll see the size update live before you download anything. For the biggest wins on PNGs specifically, use the built-in smart recommendation, which suggests WebP with a real measured size estimate rather than a guess.
Frequently asked questions
What’s the best format for smallest file size?
WebP usually compresses smallest for photos at a given visual quality, with JPG a close second. This tool’s Wasm-based WebP encoder produces genuine WebP output on every browser, including Safari.
Will compression hurt quality?
At quality 75-90, most photos show no visible difference. Lower settings trade more visible quality for smaller files -- experiment and compare in the before/after view.
Can I compress many images at once?
Yes -- drag in multiple files (or a whole folder), set a quality/format, and use "Convert All" or "Download All as ZIP".