Subtitle Generator

Generates SRT subtitle files from transcripts with configurable timing and line wrapping for video editors and content creators.

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About This Tool

The tool converts a transcript into a standards-compliant SRT file by grouping text into subtitle blocks and assigning start and end times. It supports configurable line wrapping and segment duration to match reading expectations. Conceptually, it tokenizes the transcript, applies wrapping constraints, and computes timing using a default reading speed, producing a sequence of time-stamped blocks. The approach is language-aware via ISO language codes, and designed for video editors, educators, and caption specialists who require reliable, editable captions. It emphasizes accessibility, compatibility with common video players, and predictable export formats. Unique value lies in adjustable timing heuristics, clear SRT formatting, and robust edge-case handling to maintain readability across long transcripts. Typical use cases include YouTube captions, training videos, and lecture recordings where accurate timing and legible line breaks are critical. Core features include line wrapping, duration-based segmentation, and straightforward export of a ready-to-use SRT file. The tool prioritizes deterministic results and provides clear, machine-readable outputs suitable for automation and pipelines. In practice, users provide a transcript, choose a language, set line-length and duration preferences, run generation, and then export the resulting SRT for integration with video assets.
This tool is especially valuable for content teams seeking consistent caption quality and for accessibility compliance workflows where speed and repeatability matter.
It does not translate content or alter the transcription; it focuses solely on accurate timing and formatting of SRT blocks.

How to Use

  1. Provide inputs: paste transcript_text and set language_code (ISO 639-
  2. .
  3. Configure timing defaults: max_chars_per_line, max_subtitle_duration, and optional time_offset.
  4. Run generation to produce SRT blocks.
  5. Review the resulting SRT content and adjust segmenting if needed.
  6. Export or save the SRT file for use in your video workflow.
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Frequently Asked Questions

Find Quick Answers

What formats does the tool output?
The tool outputs a standard SRT subtitle file with sequential block numbers and timestamps in the HH:MM:SS,mmm format. It focuses on SRT compatibility and does not convert to alternative subtitle formats by default.
Can I adjust timing and line breaks?
Yes. You can set maximum characters per line and a target duration per subtitle. The algorithm wraps lines accordingly and allocates duration per block, with an optional time_offset to fine-tune synchronization.
Does it translate subtitles into other languages?
No. The tool generates SRT from a transcript in a selected language code (ISO 639-1). Translation must be performed separately; you can run generation for each desired language.
How does it handle long transcripts?
Long transcripts are segmented into multiple subtitle blocks based on line-length and duration constraints. It prioritizes sentence boundaries when possible and splits at logical pauses to preserve readability.

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