Turn Script Lines into a Downloadable SRT Draft

How to Use This Tool

Create deterministic draft subtitle cues without uploading a script. Convert one caption line at a time into numbered SRT cues with editable start, duration and gap values, then download the subtitle draft.

The work this page finishes

A script can be ready while an editor still needs a syntactically valid SRT skeleton before manually aligning speech. Keeping source order beside the computed artifact lets a user repair only the failed entries and reproduce the same batch later.

Deterministic workflow

Treat each nonblank line as one cue, assign sequential indices, and advance by the entered duration plus gap using SubRip comma-millisecond timestamps. A run is capped at 5,000 items and 2 MB, preventing an accidental oversized paste while preserving successful rows when another row fails.

Why a dedicated interface helps

Import the draft into an editor and align every cue to the actual waveform; this tool removes numbering and timestamp boilerplate, not editorial timing work. A purpose-built form exposes every assumption and returns the same ordered structure on every run, which is more practical than reconciling shifting conversational output.

Assumptions

• Each line is already an intended cue.
• All draft cues initially use the same duration.
• Timing starts at or after zero.

Keep an untouched copy for comparison after import; the browser performs the work locally, but local software and extensions are not controlled by this page.

Limitations and review boundary

It does not transcribe audio, infer speech timing, wrap long captions, detect reading speed or guarantee compatibility with every subtitle editor. The implementation neither follows user-entered links nor evaluates their contents, and it displays material as plain text rather than active HTML.

Verification and provenance

Fixtures derived from the displayed rule and Library of Congress — SubRip Subtitle format were reviewed on 2026-08-26; they include normal, empty or invalid, and partial-failure behavior. Three lines at 2.5 seconds with 0.2-second gaps finish at 00:00:07,900.