CaptionFlow by Reel Routine

Turn scripts into timed captions. Paste text, get SRT/VTT — plus clean and re-chunk existing caption files. Free, private, offline.

CaptionFlow turns a plain script into timed, ready-to-post captions — right in your browser, in seconds, without uploading a single word anywhere. Built by Reel Routine for short-form creators who caption every day: • SCRIPT → TIMED CAPTIONS Paste your script or transcript, set your video length (or let CaptionFlow estimate it at natural speaking pace), and get properly timed captions chunked into short-form lines — max ~7 words per line, split on punctuation so they read the way people actually talk. Export as .SRT or .VTT for any editor or platform. • CLEAN & CONVERT EXISTING CAPTIONS Drop in an SRT or VTT file and CaptionFlow strips cue numbers and styling tags, re-chunks wall-of-text lines into punchy short-form captions, and converts between SRT and VTT. Export a clean plain-text transcript too. • PRIVATE BY DESIGN Everything runs 100% on your device. No uploads, no accounts, no analytics, no tracking — your scripts and caption files never leave your computer. The only permission requested is local storage, used solely to remember a Pro license key on your device. • FREE WHILE WE LAUNCH All core features are free. A Pro tier (karaoke word-timed ASS export for ffmpeg burn-in, batch file processing, style presets) is built in and will open when Pro launches; any creator issued a key can activate it in the extension today. Made by Reel Routine — we caption reels for creators every day, so we built the tool we kept wishing existed.