Convert iTT
to ASS
Drop in a .itt (iTunes Timed Text) file, get a clean .ass (Advanced SubStation Alpha) back. Advanced SubStation Alpha is the heavily-styled subtitle format used by Aegisub and the fansub community. The conversion runs entirely in your browser — your captions never leave the page.
Frequently asked
Why convert iTT to ASS?+
ITunes Timed Text is Apple's TTML 1.0 profile used by iTunes and Final Cut Pro. Strict XML with limited per-element styling. Advanced SubStation Alpha is built for typography-rich subtitles, karaoke, kinetic typesetting. Converting lets you take a file produced for one workflow and use it in the other without re-typing or re-timing anything.
Is timing preserved exactly?+
Yes. The converter only re-encodes the file structure — start and end times round-trip to within one millisecond.
Does any styling survive the conversion?+
iTT doesn't carry styling, so the output ASS uses default formatting. Restyle in your editor after import.
Does this run on a server?+
No. The conversion is pure JavaScript running in your browser — files never upload anywhere. Works offline once the page is loaded.