05 · privacy, side by side
What changes when the engine runs in your tab.
what
Optimal Convert
the others
File bytes
stay in the browser
leave the device
Page-content scan
runs locally
submitted to vendor
Conversion log
logged in your devtools
kept on a vendor server
Processed files
discarded when the tab closes
retained and re-used
Watermarks / ads
never added
sometimes added
Account required
no
yes, almost always
get started
Your next conversion is already free.
No accounts. No rate limits. No watermarks. Every conversion runs in your browser. If you’re a clinic, law firm, or regulated team that needs to audit the pipeline, write to us — we’ll point you at the engine source and the format modules.