Free online ITT to ASS converter

Apple timed-text files may need conversion when a subtitle editor, media player, or playback workflow accepts ASS but not ITT. ASS is also preferable when you need editable subtitle styling, precise positioning, or compatibility with tools such as Aegisub and libass-based players.

What the ITT format is

ITT usually means iTunes Timed Text, an XML-based subtitle format used in Apple video-delivery workflows and encountered in files prepared for Apple TV, iTunes, or related captioning pipelines. An ITT file stores timed subtitle text together with cues, formatting tags, regions, and sometimes language or accessibility metadata.

ITT is intended for timed-text interchange rather than general subtitle authoring. Its XML structure and Apple-specific elements are not supported by every desktop player or subtitle editor.

What the ASS format is

ASS, or Advanced SubStation Alpha, is a text-based subtitle format designed for styled subtitles. It stores dialogue events, exact timing, fonts, colors, margins, alignment, screen coordinates, layers, and reusable style definitions.

ASS is useful when subtitles require fixed placement, multiple visual styles, karaoke effects, or detailed typesetting. Aegisub, Subtitle Edit, MPC-HC, mpv, and other software can read ASS, although rendering varies between applications and video players.

How to convert ITT to ASS

Using Subtitle Edit

1. Install and open Subtitle Edit.
2. Select File → Open, choose the ITT file, and confirm that the imported cues, timing, and text display correctly.
3. Check the subtitle frame rate or video frame rate if the file contains frame-based timing. ITT normally uses time-based XML timestamps, but the project settings still affect later editing and export.
4. Choose File → Save as.
5. Select Advanced SubStation Alpha (*.ass) as the output format, enter a filename such as subtitles.ass, and save.
6. Open the resulting ASS file in Subtitle Edit or Aegisub and inspect line breaks, styling, positioning, and overlapping events.

Subtitle Edit is generally the most practical desktop choice because it can parse common ITT files and export ASS without requiring a video re-encode. If you do not want to install software, the built-in converter on 101convert.com can convert the file online for free.

Quality and compatibility limitations

Dialogue text and cue timing usually transfer, but ITT features do not map one-to-one to ASS. Apple-specific metadata, caption-region definitions, accessibility attributes, some inline formatting, and unsupported XML elements may be discarded. ITT layout information may become ASS margins, alignment, or approximate positioning rather than an exact visual match.

After conversion, verify characters such as quotation marks, accented letters, and XML entities; also check right-to-left text and language-specific line direction. ASS styling depends on the renderer, so a subtitle that looks correct in Aegisub may appear differently in a player that uses a different libass or subtitle engine.

If the source contains separate caption regions or speaker labels, review every event manually. Save the original ITT file, because converting back from ASS cannot restore metadata or formatting that the export removed.