Caption reading-speed checker
Caption reading-speed checker: a free tool that runs entirely in your browser. No sign-up, nothing uploaded.
Paste an SRT: words per second per cue, lines over the limit, and how long a voice-over takes to say.
Parameters, not laws: 2-3 words per second is comfortable for on-screen text; 150-170 words per minute is a natural speaking rate; 32 characters per line keeps two lines inside a 9:16 safe zone at a readable size. Change the numbers to your own standard.
From the library
Talking-head clip: the script format AI avatar and lip-sync tools read best
How to write a 20-second spoken script so that a lip-sync or avatar model delivers it with natural pauses and no mispronounced numbers.
Before you post a generated video: disclosure and rights checklist
Six checks for AI-generated clips before they go on TikTok, Reels, Shorts or a client's site: labels, likeness, music, logos, model terms and provenance.
Related tools: Safe-zone and aspect-ratio overlay · Script, shot list and prompt list
All tools: Veo 3 prompt generator · Video prompt builder · Script, shot list and prompt list · Image to prompt · Frame grabber · Safe-zone and aspect-ratio overlay · Hook generator