SRT files vs YouTube auto-captions: what a text toolkit can and cannot do

Subtitles, captions, chapters, and burned-in titles get mashed into one mental folder. They are not the same file. The SRT Toolkit on this site edits .srt text in the browser. It does not listen to your video. This page draws the lines so you pick the right tool instead of a speech-to-text site that uploads the episode.

What an SRT file is

SubRip is a timed text format: an index, a start → end time, then one or two lines of dialogue. YouTube, many players, and most editors will import it. The useful operations after a transcript exists are boring and easy to get wrong by hand: shift every cue by 1.2 seconds because the export started late, merge two language files, strip leftover HTML from a caption tool, fix overlaps, renumber.

That is the toolkit. Shift, merge, clean. Local text. No account.

We do not export WebVTT, do not burn captions into pixels, and do not generate speech-to-text. If you need a first transcript, use YouTube’s own auto-captions, a desktop STT tool, or a human captioner — then bring the SRT here to repair timing.

YouTube auto-captions vs a file you own

Auto-captions are convenient and often wrong on names, jargon, and overlapping speech. You can download or copy them (Studio’s workflow changes; check the current Caption menu) and treat the result as a draft SRT. Cleaning that draft is a text job. Replacing it with a better file is still a Studio upload job. This site never talks to your channel.

Hardcoded / burned-in captions are part of the picture. They are inaccessible to some viewers, untranslatable, and painful to fix. Prefer a sidecar SRT unless you are making a silent social cut where the platform strips separate captions.

Timing repairs people actually need

• Global shift— the whole reel is 400 ms late after an intro was added. Shift every cue. Do not retype times.
• Merge — English and a second language, or two halves of a split record. Order and overlaps still need a pass.
• Clean — leftover <font> tags, duplicate indexes, cues that overlap by a frame and flicker in players.

Overlaps are not the same as chapters. A chapter list in the description has to start at 0:00 and keep 10-second gaps. Chapter rules are a different document.

When not to use this toolkit

You do not have a transcript yet. You want live captions. You want to download someone else’s video to steal their SRT. You need VTT for a web player with cue settings. Those are other products. Using an SRT cleaner as a fake STT page is how tool sites earn a “misleading functionality” reputation — we would rather be small and accurate.