1. Home
  3. Video
  5. YouTube Timestamp Generator

YouTube Timestamp Generator

Convert between seconds and HH:MM:SS and build YouTube chapter lines for your description.

Runs in your browser Free

Seconds → HH:MM:SS

01:02:05

HH:MM:SS → seconds

3725

YouTube chapters

One chapter per line: a time (seconds, MM:SS or HH:MM:SS) followed by a title.

Processed locally in your browser.

    Why YouTube chapters matter

    Timestamps in a video description split the YouTube progress bar into chapters. Viewers can jump straight to the part they want, and Google may show chapters as 'key moments' in search results, improving both viewer experience and discoverability.

    What the tool does

    • Converts seconds to clock time such as 1:05:30 and back
    • Turns your list of times and titles into chapter lines in the format YouTube expects
    • Checks the rules, such as the first chapter starting at 0:00

    Copy the list and paste it into your video description. Everything happens in your browser.

    How to use YouTube Timestamp Generator

    1. Enter chapter start times and titles.
    2. The tool converts the times to the right format.
    3. Check the rule warnings.
    4. Copy the chapter list into your YouTube description.

    Why use this tool?

    Prevents formatting mistakes in chapter lists and helps your videos become more visible in search.

    FAQ

    What do YouTube chapters require?

    The first chapter must start at 0:00, there must be at least three chapters and each must be at least 10 seconds long.

    Why don't the chapters show on my video?

    A rule may be missing, or YouTube may need some time to process the description. Also check that automatic chapters are enabled in your channel settings.

    Are videos longer than an hour supported?

    Yes, timestamps with hours such as 1:02:15 are formatted correctly.

    Related tools

    Private

    Video Duration Checker

    Find the exact length of one or many video and audio files, plus the total duration.

    Open tool
    Private

    Unix Timestamp Converter

    Convert Unix timestamps to dates and dates to timestamps, in seconds or milliseconds.

    Open tool
    Private

    Subtitle FPS Converter

    Re-time subtitles for a different frame rate, for example from 23.976 to 25 fps.

    Open tool
    Free

    YouTube Thumbnail Downloader

    Download the thumbnail of any YouTube video in every available resolution, including HD.

    Open tool