Timestamp / Chapter Generator

Load your video or audio, hit a hotkey at every new topic, type the chapter name — and get a perfectly formatted timestamp block for YouTube in seconds.

Start Timestamp Generator

100% Browser-Based No Upload Required No Account Needed Completely Free

Key Features

One-Key Chapter Marking

Press M (or tap the Mark button) at any moment while your video plays to drop a chapter marker — no interruption needed.

Works with Video & Audio

Load any local MP4, MOV, MKV, MP3, WAV or other media file directly. No upload, no server, no waiting.

YouTube-Ready Output

Generates a perfectly formatted timestamp block (00:00 Intro, 01:15 Topic A) ready to paste into your YouTube description.

Edit & Reorder

Rename, delete or reorder any chapter marker at any time before exporting.

One-Click Copy

Hit Copy and the full timestamp block is in your clipboard — ready to paste straight into YouTube Studio.

Fully Private

Your media file never leaves your device. Everything runs locally in the browser with no data collection.

Perfect For

Adding chapter markers to long YouTube tutorials

Generating timestamps for podcast episodes uploaded to YouTube

Quickly marking interview sections without pausing the video

Creating navigation markers for documentary or review videos

Structuring online course videos with clear chapter labels

Any creator who is tired of manually typing timestamps

Frequently Asked Questions

How do I add a chapter marker?

Load your file, press Play, and press M on your keyboard (or click the Mark Chapter button) whenever a new topic starts. A dialog will appear so you can type the chapter name.

Does the first chapter have to start at 00:00?

Yes — YouTube requires the first timestamp to be 00:00. The generator automatically adds it if you start the video and mark a chapter at the very beginning.

What file formats are supported?

Any format your browser can natively play: MP4, WebM, MOV, MP3, WAV, OGG, and more. No FFmpeg or conversion is needed.

Is my video uploaded anywhere?

No. The file is opened directly from your local disk using the browser's File API. Nothing is sent to any server.

Ready to create your timestamps?

Launch the Chapter Generator directly in your browser — no installation, no sign-up.

Start Timestamp Generator

YouTube Chapters Timestamp Generator Chapter Marker YouTube Description Video Chapters YouTube Timestamps Free Tool Browser-Based No Upload Content Creator