All conversions run in your browser via Canvas API and WebAssembly. Nothing is uploaded to any server.
Frequently Asked Questions
Yes — completely free, no account required, no watermarks, no conversion limits. Convertlo is free forever.
No. All conversions happen locally in your browser. Your images never leave your device — not even temporarily.
Yes — enable Batch Convert mode on the converter to process multiple images in one go. Each file downloads individually.
WebP is the best choice for web use — typically 30% smaller than JPG at the same quality. Use PNG for transparency. Use JPG for photos where file size matters. AVIF is the newest, with even better compression but lower browser support than WebP.