Pick a job, drop your files, choose the output. Everything runs inside your own browser.
Why "no upload" matters
Most online converters send your file to their servers, do the work there, and send it
back. That is a reasonable way to build a website, and it means your file sits on a
machine you do not control, under a retention policy you did not read.
The files people convert are rarely holiday snaps. They are passport scans, signed
contracts, medical letters, bank statements and photographs of their children. Browsers
have been able to do this work locally for years - there is no good reason those files
should leave the device at all.
What that gets you
Nothing is uploaded. You can verify it in your browser's network tab.
No waiting on an upload. Large files start immediately.
No size limits beyond what your own device can handle.