Free video caption tools that run in your browser.
Format captions, preview safe zones, and inspect video files without creating an account or using CapzAi credits. These tools are built for quick prep work before the full AI caption, clipping, translation, and export workflow.
Caption formatter
Clean, wrap, and convert captions
Format rough transcripts, normalize SRT files, convert SRT to VTT, and extract plain text in the browser.
Open toolSafe-zone checker
Preview caption placement
Test caption position against common TikTok, Reels, and Shorts interface zones before exporting.
Open toolVideo inspector
Check video file details
Inspect local file size, duration, resolution, and aspect ratio before moving into an editor.
Open toolReading speed checker
Measure caption readability
Check WPM and characters per second so captions are readable on TikTok, Reels, and Shorts.
Open toolAspect ratio calculator
Calculate social video crops
Convert video dimensions into 9:16, 1:1, 4:5, and 16:9 crop or padding guidance.
Open toolSocial caption formatter
Format captions and hashtags
Turn topic keywords into clean hashtags and a simple posting caption for social platforms.
Open tool