Free tools
Quick tools for subtitle files, scripts and caption placement. They run in your browser and need no account.
Free SRT to VTT converter (and VTT to SRT)Convert SRT subtitles to WebVTT, or VTT back to SRT, right in your browser. Free, no account, and the file is never uploaded.Fix out-of-sync subtitles: shift SRT timingSubtitles showing too early or too late? Shift every caption in an SRT or VTT file by any number of seconds, free and without uploading it.Safe zone checker for TikTok, Reels and ShortsSee what TikTok, Instagram Reels or YouTube Shorts covers on your vertical video, and where captions stay readable. Free and local.Remove filler words from SRT subtitles, freeTake um, uh and hmm out of an SRT or VTT file and split long captions into short ones for vertical video. Free, in your browser, nothing uploaded.Script timer: how long will your script take to say?Paste a script to see how long it takes to say at your pace, and how many words fit a 15, 30, 60 or 90 second Short or Reel. Free.Subtitle QC checker: line length, reading speed and gapsCheck an SRT or VTT file for long lines, fast reading speed, short or long captions, overlaps and frame gaps before delivery. Free and local.SRT to text: subtitles to a plain transcriptTurn an SRT or VTT subtitle file into plain text: timestamps and numbers out, paragraphs kept. Free, in your browser, nothing uploaded.LUFS loudness meter for YouTube, TikTok and ReelsMeasure a video's integrated loudness in LUFS and its true peak, and see how far it is from YouTube's and TikTok's -14 LUFS. Free, nothing uploaded.Dead air finder: how much silence is in your videoFind every pause in a video or recording: how many seconds of dead air, where each pause is, and how long the video runs with them cut. Free and local.Extract audio from a video, free and without uploadingSave the sound of an MP4, MOV or WebM video as a WAV file, in stereo or mono, right in your browser. Free, no account, the video stays on your computer.