SRT Validator

The SRT Validator analyzes SubRip subtitle files to verify adherence to the SRT grammar and timing requirements. It tokenizes each cue by index, time range, and caption lines, and reports any deviations such as missing indices, malformed timestamps (should be hh:mm:ss,ms --> hh:mm:ss,ms), or abrupt sequence changes. It is designed for video editors, localization teams, QA engineers, and production pipelines that require reliable caption behavior across players and platforms.

Conceptually, the tool parses the file, builds an ordered cue list, applies strict checks for format correctness, and computes timing relationships. It offers optional checks like maximum line length, number of lines per cue, and drift metrics to highlight inconsistent timing. The core value is early detection of compatibility issues before playback, transcoding, or streaming.

Core features include fast, deterministic parsing, detailed per-cue error reporting with line numbers, and exportable reports in CSV or JSON for audits and CI integration. Use cases include subtitle QA before release, localization workflows validating translated subtitles, and validation as part of CI pipelines.