Subtitle fixer and converter

Open an SRT or VTT file (or paste a transcript with timestamps). See every overlap, flash cue, over-long line and too-fast cue, fix them in one click, re-sync timing that drifts, and download SRT, VTT or text.

Open an SRT, VTT, TXT or project file

Caption style and frame

Style Frame Text size Height from bottom Pan (crop position) Words per caption Capitals Show app safe area

Safe-area shading is approximate: TikTok, Reels and Shorts move their buttons now and then.

Clip none

Click a line to start the clip there, then Shift-click (or long-press) the last line. Nudge the ends below.

In –

Out –

Exports at the frame and caption style above. No watermark.

Check and fix 0

Chars/line Lines Chars/sec

Shift timing

Two-point sync

For drift. Enter when an early line and a late line should appear (m:ss.s).

Line should be at Line should be at

YouTube chapters –

Breaks are suggested where the speaker pauses and a sentence ends. Rewrite the titles, then copy the list into your video description.

How many

Download

Project saves the transcript, edits and settings so you can pick up later. Your work is also kept in this browser automatically.

More free tools

YouTube transcriptCaptions YouTube already has, in seconds, searchable and downloadable.Transcribe a fileMP4, MOV, MP3, WAV, M4A to text and captions, without uploading.TikTok transcriptTikTok link to text, SRT or captions in seconds.Instagram transcriptReel link or saved Reel to text, SRT and captions.Facebook transcriptFacebook videos and Reels to text and subtitles.X (Twitter) transcriptVideos posted on X to text and subtitles.YouTube Shorts transcriptText of any Short, from its link, in seconds.Clip from transcriptClick sentences, export that clip as MP4 with its subtitles.YouTube chaptersChapter timestamps at natural pauses, checked against YouTube rules.Add captions to videoStyled, burned-in captions, 9:16 crop and safe-area guides.Loudness checkerLUFS and true peak vs YouTube, podcast and broadcast targets.Audio syncLine up a separate recorder with your camera automatically.Compress videoFit a video under 10 MB, 25 MB or any size, no upload.Extract audioVideo to M4A (lossless copy) or WAV, instantly.Thumbnail frame pickerSharpest frames from a video, previewed at YouTube sizes.Silence removerFind dead air; export an EDL timeline or a tightened WAV.

Questions

What does "fix all" change?

It removes empty cues, puts cues in time order, splits cues too long for two lines, trims overlaps, lengthens cues that flash by, and re-wraps lines. It lists every change, and Undo puts it back.

My subtitles start in sync and drift. Can it fix that?

Yes. Use two-point sync: tell it when one early line and one late line should appear, and it re-times everything between, which corrects frame-rate drift as well as offsets.

What limits does it check?

By default 42 characters a line, 2 lines, 17 characters a second, at least 0.83 seconds on screen. These are common streaming style-guide values; change them to match your client's spec.