# Add chapters to your podcast MP3 files.

A simple open-source online tool without install or signup, running locally in your browser. Works with all podcast players that support `id3` chapters. Supports chapter images, podlove, json, and editing mp3 tags.

To start, load your audio file.

or drag and drop file
Drop an mp3 file to load.
example.mp3

## Edit chapters

Chapters are managed using the same syntax also used by YouTube. Each chapter is one line, starting with the timestamp when the chapter begins (for example `03:20` or using milliseconds `14:21.320`), followed by a space, followed by the name of the chapter. Chapters can also have a link and an image associated with them, see below for details.

The list of chapters can be pasted into your episode description for Spotify and YouTube.
Advanced: Chapter URLs, images, hidden chapters

Each chapter can be assigned a link that will be shown by some players. To add a link, add the URL (starting with `http://` or `https://`) to the end of the chapter line.

Each chapter can be assigned an image. To add an image, upload an image below and add its code (for example `<img-6>`) to the end of the chapter line. Images in the gallery that are not assigned to a chapter are ignored. The same image can be used for multiple chapters. Images larger than 1400px wide or tall will be scaled down. A chapter can get both a link and an image. You can also paste an image from the clipboard; if you do this while editing the chapter list, the correct image code will be inserted at the cursor position.

A chapter can be hidden from the table of contents (i.e., the chapter list). This can be useful to show a chapter image for some time period without showing a separate chapter. To hide a chapter, begin its name with `_` (an underscore), for example `_photo` or simply `_`. Note that hidden chapters are ignored by some players.

or drag and drop file or paste an image
Drop an image file to load.

## Edit MP3 tags

MP3 files can contain metadata such as title, artist, etc., known as ID3 tags. You can edit these tags below. For podcasts, not all fields are applicable and can be left empty.

Title
Artist / Author
Album / Podcast name
Track number / Episode number
Year
Release Date (YYYY-MM-DD)
Genre
Copyright
Publisher
Language
Encoded by
Website
Cover image

## Export

Podlove Simple Chapters XML and Podcast Namespace JSON

Besides embedded ID3 chapters, other standards for specifying chapters exist. Examples are the Podlove Simple Chapters XML and Podcast Namespace Chapter JSON formats, which can be added to a podcast RSS feed via embedding into the `<item>` tag (XML) or by adding a link (JSON, XML). While most podcast players use embedded chapters, some other players (notably Spotify) only support time stamps in the episode description or Podlove chapters.

Include image links

You will need to upload the images to a web server and add the URLs to the chapter list.

Image base URL
Podlove Simple Chapters XML

Podcast Namespace JSON

Drop an mp3 file to load.