Add captions to a video

Pick a caption style, crop to 9:16, 1:1 or 4:5, check what the app's buttons will cover, and export a captioned MP4. Your video never leaves your computer: the speech model downloads once and runs in this tab.

Drop a video or audio fileor click to choose. MP4, MOV, WebM, MP3, M4A, WAV

Accuracy Language

Runs on your device. The speech model (OpenAI Whisper) downloads once, then works offline.

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.Subtitle fixerOverlaps, flash cues, long lines, drift: found and fixed. SRT ⇄ VTT.Clip from transcriptClick sentences, export that clip as MP4 with its subtitles.YouTube chaptersChapter timestamps at natural pauses, checked against YouTube rules.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

Can it highlight each word as it's spoken?

Yes, the "Word pop" style does, when the transcript has word timing (anything transcribed here, and YouTube automatic captions).

Are the safe-area guides exact?

They are approximate: each app moves its buttons now and then. Keep important text inside the clear zone and you are fine in all three.