About

jarvisbox is a free, mobile-first toolbox that runs entirely in your browser using the Canvas API. There is no server-side processing — your files never leave your device.

Supported formats

• JPEG — best compatibility for photos.
• WebP — smaller files than JPEG at similar quality. Supported in all modern browsers.
• AVIF — typically the smallest file size, but encoder support varies. We auto-detect and fall back to WebP if AVIF encoding is unavailable.

Tips

• Quality 75–85 is usually a sweet spot for photos.
• Use WebP for the web; use JPEG for the broadest sharing compatibility.
• For batches, hit Compress all, then Download ZIP.