Free tools for voice-over and subtitles
Quick calculators and subtitle fixes you can use without an account. The calculators and subtitle tools run in your browser, so nothing you paste is uploaded.
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Free tool
Words to minutes
Paste a script or enter a word count to see how long it takes to read aloud at a relaxed, average or brisk narration pace. Free, no sign-up.
Runs in your browser · No sign-up
Free tool
Audiobook length
Estimate how many hours your book will run as an audiobook from its word or page count, at the narration pace you choose, with the characters to voice it.
Runs in your browser · No sign-up
Free tool
SRT ↔ VTT converter
Convert subtitles between SRT and WebVTT, or turn them into a plain-text transcript. Runs in your browser — nothing is uploaded. Free, no sign-up.
Runs in your browser · No sign-up
Free tool
Subtitle timing shift
Subtitles out of sync? Move every caption earlier or later by any amount, or only those after a set point, and download the fixed SRT or VTT file.
Runs in your browser · No sign-up
Free tool
Video caption generator
Add captions to a video in your browser: auto-timed subtitles, styles for Shorts and Reels, translation, SRT/VTT download and an optional AI voice-over.
Beta · Works without an account