Why here
Most converters upload your file to a server and hand it back. Everything here runs inside the page instead, so the file never leaves your device. There is no queue, no size cap and no watermark. The unit converters and code translators work the same way: type in either box and the other answers as you type, and nothing you type leaves the page.
Questions
Which kinds of file can it convert?
Images, 3D models, audio, video, data and tables, maps and GPS tracks, subtitles, fonts and archives, plus PDFs.
Where are the QR codes and barcodes?
They are made rather than converted, so they live under Images & Design.