Add your ITT file
Drop one or more .itt files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
ITT to SSA
Converting a .itt file to .ssa extracts the document's content from its office package into a portable form. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop ITT files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting iTunes Timed Text to SubStation Alpha subtitles
Converting a .itt file to .ssa extracts the document's content from its office package into a portable form. An .itt file is an iTunes Timed Text document: a constrained TTML profile that Apple defined for subtitle delivery to the iTunes Store and Apple TV. Its defining trait is timing — cues are addressed in SMPTE timecode (HH:MM:SS:FF) against a frame rate declared in the document header.
An .ssa file is a SubStation Alpha subtitle script — the v4.00 predecessor of Advanced SubStation Alpha. It uses the same [Script Info] / styles / [Events] layout and the same Dialogue timing, with a smaller style table and no v4+ extensions. For this route the practical draw is still rendered by every libass-based player decades later and simpler than the v4+ revision, so easier to parse and hand-edit — balanced against superseded by .ass, which every current authoring tool writes instead, which is worth knowing before you commit a large batch.
Why convert ITT to SSA?
The practical trigger for this conversion is usually a mismatch: with .itt, frame timecodes are meaningless without the declared frame rate, so a mis-set header shifts every cue. Switching to .ssa buys you still rendered by every libass-based player decades later, which is why it is the better fit for reading subtitle scripts from late-1990s and early-2000s releases. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
ITT vs SSA at a glance
| Aspect | iTunes Timed Text (.itt) | SubStation Alpha subtitles (.ssa) |
|---|---|---|
| Format type | Text-based — characters and structure, so there is no visual quality loss | Text-based — characters and structure, so there is no visual quality loss |
| How it stores data | timing is frame-accurate: begin and end are HH:MM:SS:FF timecodes resolved against ttp:frameRate, optionally scaled by ttp:frameRateMultiplier for drop-frame rates such as 23.976 | the [V4 Styles] section uses TertiaryColour and AlphaLevel fields that the later [V4+ Styles] table replaced |
| Strongest at | delivering subtitles to Apple's ingest specifications | reading subtitle scripts from late-1990s and early-2000s releases |
| Weak spot | frame timecodes are meaningless without the declared frame rate, so a mis-set header shifts every cue | superseded by .ass, which every current authoring tool writes instead |
| Metadata | the frame-rate parameters are read because timing depends on them; styling attributes are dropped, since millisecond caption targets have nowhere to record them | the v4 style table and script headers describe presentation only; timing and text survive conversion, styling does not |
Pick SSA as the output
Select .ssa in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if SSA is selectable, the route is real and validated.
Convert on your device
Press Convert. The package is unzipped in memory and its XML content parsed locally; nothing is uploaded.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid SSA file. Outputs keep the original filename with the .ssa extension.
ITT to SSA questions, answered
Will converting ITT to SSA lose quality?
There is no visual quality to lose — itt is text-oriented and ssa is text-oriented, so the question is structural fidelity. Text, ordering, and basic structure are preserved; complex layout, embedded objects, and styling beyond the target's model are simplified.
Is it private to convert ITT files here?
Yes — the .itt file is processed inside your browser tab and never uploaded. The package is unzipped in memory and its XML content parsed locally; nothing is uploaded. Close the tab and the file is gone from memory.
Where will the SSA file work?
VLC, mpv, and other libass-based players handle .ssa alongside .ass, and Aegisub opens it for editing. No browser renders it. Novus Convert parses the v4 events locally through the same cue model as .ass and exports to any of the twelve timed-text targets.
Will the SSA file be bigger or smaller than my ITT?
It depends on the content: the [V4 Styles] section uses TertiaryColour and AlphaLevel fields that the later [V4+ Styles] table replaced. Convert one representative file first and compare before batch-processing a large set.
What happens to the metadata in my ITT file?
In .itt, the frame-rate parameters are read because timing depends on them; styling attributes are dropped, since millisecond caption targets have nowhere to record them. Re-encoding through the browser pipeline does not carry embedded metadata into the output, which doubles as a privacy scrub — check the exported file if you specifically need tags preserved.
Can I convert SSA back to ITT?
Yes — the reverse route exists as a separate tool. Bear in mind that round-tripping .itt → .ssa → .itt is not a perfect undo when any lossy step is involved; keep your original if fidelity matters.