Media

Subtitle Toolkit

Subtitle files often need small timing fixes before publishing. Subtitle Toolkit converts common SRT/VTT text, applies offsets and flags invalid or reversed cue timing.

Offset seconds2 cues · 1 notes · 0 issues

Parses subtitle blocks as cues instead of line-by-line replacement. Multi-line cue text is preserved, VTT cue settings are kept when exporting VTT, NOTE blocks stay in VTT output, and SRT output is renumbered.

Input subtitle

Converted output

WEBVTT

NOTE Internal review cue
Keep this note when exporting VTT.

intro
00:00:01.000 --> 00:00:03.400 align:start position:10%
Welcome to the launch.
This line should stay attached to the same cue.

00:00:04.000 --> 00:00:06.000
Everything runs locally.

Quality checks

No timing, overlap or parsing issues detected.

runtime

Browser-local execution

Inputs stay inside the current tab unless you copy, download or explicitly export.

memory

Session handoff

Magic Paste can pass input to a target tool through sessionStorage, never through the URL.

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User-owned state

Favorites, recent tools and workflow history are local browser data you can clear from the browser.

smart handoff graph

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01

How to use

01Paste SRT or VTT subtitle text.
02Choose output format and offset seconds.
03Copy converted subtitles and review quality checks.

02

FAQ

Does it support styling?: It keeps simple cue text and timestamps. Advanced styling is intentionally limited.

03

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