2023-11-27 Please note: My blogging platform has moved to https://1010.gitlab.io and I will post all future updates to this article on the copy of this post at: https://1010.gitlab.io/posts/customize-mastodon-character-limit/

⭐ Updated for Mastodon v4.2.1!

The Mastodon social media service has a 500-character limit on post text. This article documents how you change the character limit in the web user interface and API endpoint that returns instance configuration data to clients (the latter is how many mobile apps that support post length customization define your instance character limit).

DeepL is a machine translation service with a REST API supported by the Mastodon social networking software. As of the Mastodon v4 release, instance administrators can configure support for user post translations between the following languages: