YouTube subtitle converter

The tool ingests a subtitle file or text, recognizes the input format, and converts it to a requested target format while preserving cue scope, order, and timing. It supports common formats such as SRT, VTT, TTML, and SBV, and outputs a valid subtitle file ready for upload to YouTube or other players. The internal representation stores each cue as {start, end, text} to ensure faithful data transfer and easy reformatting.
Conceptual operation: after ingestion, the system parses cues using format-specific grammars, normalizes timestamps to a shared base (milliseconds), and applies an optional time offset. It then formats cues into the target syntax, respecting differences such as line wrapping and cue numbering rules. A validation report is produced, listing total cues and any anomalies.
Audience and differentiators: creators, editors, and localization teams use this for multilingual captions and platform migrations. Unique value includes robust cross-format support, strict conformance to standards, batch processing, and an API option. Typical use cases include SRT to VTT for web players, TTML to SRT for offline editors, and alignment fixes for translated subtitles. Industry implications: aligns with accessibility practices and YouTube caption workflows; ensures UTF-8 encoding and proper newline handling for cross-platform compatibility. Assumptions & Exclusions: assumes inputs are textual subtitle data with timestamps; does not perform automatic translation; not a video editor; does not embed audio/video; not real-time streaming; batch support is optional.