Converters VTT ⇄ ASS Converter

VTT ⇄ ASS Converter

Convert WebVTT (.vtt) subtitles to Advanced SubStation Alpha (.ass), or ASS back to VTT. Supports files up to 200MB.

Upload .vtt

VTT input

Output

[Script Info]
ScriptType: v4.00+
WrapStyle: 0
ScaledBorderAndShadow: yes
YCbCr Matrix: TV.601

[V4+ Styles]
Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
Style: Default,Arial,20,&H00FFFFFF,&H000000FF,&H00000000,&H00000000,0,0,0,0,100,100,0,0,1,2,0,2,10,10,10,1

[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:01.00,0:00:04.00,Default,,0,0,0,,Hello there
Dialogue: 0,0:00:05.00,0:00:07.50,Default,,0,0,0,,How are you?

Or convert a file directly — supports files up to 200MB

Drag & drop a file here, or click to browse

Processed in the background, so the page stays responsive even for huge files

How to use this tool

Pick a direction, paste or upload your file — the result updates instantly as you type. VTT → ASS wraps your cues in a minimal valid ASS structure with a default style; ASS → VTT extracts dialogue timing and text and adds the required WEBVTT header. Style overrides and effects in the ASS file aren't preserved — only cue timing and plain text. Runs entirely in your browser.

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