TXT to ASS Subtitle Converter

Quickly convert Plain Text subtitles to Advanced SubStation Alpha locally in your browser. Timelines and subtitle content are never uploaded.

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What happens when converting TXT to ASS?

Plain Text content is parsed into a unified millisecond timeline before being exported as Advanced SubStation Alpha. Valid timing and subtitle text are preserved.

ASS output uses a compatible ASS v4+ default style while preserving subtitle text and timing.

TXT has no timeline, so every non-empty text line is assigned five seconds by default.

Format overview

About TXT and ASS subtitle formats

Learn what each file format is, how it is structured, where it is commonly used, and what to consider during conversion.

Source file format

TXT · Plain Text

TXT is a plain-text file rather than a dedicated subtitle format with a standardized timeline. It usually stores subtitle, dialogue, or lyric text without information about when each line appears.

File structure: TXT has no fixed subtitle syntax and generally contains one or more lines of text. Individual files may include paragraphs, speaker names, or other manually arranged information.
Common uses: TXT is commonly used for video transcripts, dialogue editing, translation and proofreading, lyric extraction, and passing subtitle content to text-processing or AI tools.
Conversion notes: Exporting to TXT removes every timestamp. When converting TXT to a timed subtitle format, this tool treats each non-empty line as one cue and assigns it five seconds by default.

Target file format

ASS · Advanced SubStation Alpha

ASS, or Advanced SubStation Alpha, is an enhanced successor to SSA. It can precisely control subtitle fonts, colors, positions, animation, and karaoke effects.

File structure: ASS files are organized into sections such as Script Info, V4+ Styles, and Events. Subtitle cues are usually stored as Dialogue lines that reference predefined styles.
Common uses: ASS is commonly used for anime subtitles, visual subtitle effects, complex typesetting, karaoke, and video workflows that require precise presentation control.
Conversion notes: ASS can express much more styling than SRT, LRC, or TXT. When converting to a simpler format, this tool preserves visible text and timing but not complex styling, positioning, or animation.