Can the Windows app convert multiple PNG files at once?

Yes. Add files or a folder to one queue, then choose AVIF as the shared output format.

Will lossless AVIF always make a PNG smaller?

No. Lossless mode is about reversible pixels, not a promise of the smallest file. Results depend on the image content and the encoder output.

No. ImgConvert is a desktop app and processes selected files locally.

WINDOWS · PNG → AVIF

ImgConvert processes the PNG files or folders you choose on Windows and writes AVIF output without sending images to a web service.

True lossless AVIF preserves pixels, but does not guarantee a file smaller than the source PNG.

Multiple PNG files can share one queue. Conversion and compression happen on the device.