YouTube Chapter Timestamp Generator
Build YouTube chapter timestamps for your video description in the correct format (00:00 Intro). Add chapters, auto-sort, and copy a ready-to-paste list. Free, private.
Last reviewed by the Radiatus Cloud team
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Build YouTube chapter timestamps
YouTube turns timestamps in a description into clickable chapters, and formatting them correctly is required for it to work. This tool builds YouTube chapter timestamps in the correct format for your video description.
Why chapters need the right format
YouTube automatically creates chapters from a description if the timestamps follow specific rules: they must start at zero, be in order, each on its own line with a label, and there must be at least a few. Get the format wrong and chapters simply do not appear. Chapters improve a video by letting viewers jump to sections and by showing labelled segments on the progress bar, which aids both experience and discovery. Generating the timestamps in the exact required format ensures the chapters actually work.
Chapters that work
It runs entirely in your browser, so nothing you enter is uploaded and it works without an account, keeping your figures on your own machine.
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Frequently Asked Questions
How does YouTube make chapters from timestamps?
It creates them automatically if the description contains timestamps following its rules: starting at zero, in order, each on its own line with a label.
Why do my chapters not appear?
Usually because the format is wrong, not starting at zero, out of order, or too few. The generator produces the exact format YouTube requires.
Why add chapters to a video?
Because they let viewers jump to sections and show labelled segments on the progress bar, improving both experience and discovery.
What format is required?
Timestamps starting at 0:00, in chronological order, each on its own line with a chapter title, and at least three chapters.
Is my input uploaded?
No. The generation runs entirely in your browser.
Privacy & Security
All processing happens locally in your browser — nothing is uploaded.
How to Use
Add each chapter's time and title. The first must be 0:00. Copy the formatted list into your description.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
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UtilityParse a User-Agent string into browser, engine, operating system and device. Explains why UA strings are unreliable and what to use instead.
QR Code Generator
UtilityGenerate QR codes for URLs, text, Wi-Fi and contact details. Adjustable error correction and size, produced entirely in your browser.
Credit Card Validator
UtilityValidate a card number with the Luhn algorithm and identify the issuing network from its prefix. Runs locally, nothing is transmitted.