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LS1L File - What is an .ls1l file and how do I open it?

Learn about .LS1L files and view a list of programs that open them.

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Overview

What is an LS1L file? An LS1L file is a layout file used by LiveSplit One, a browser-based timer for speedrunning. It stores information in the JSON standard about how the timer and other elements are displayed during a speedrun. LS1L files may include layout components such as the timer display, split list, title, comparison information, and background settings.

More Information LS1L file open in LiveSplit One Speedrunners and content creators are the primary users of LS1L files. They use these files to customize the look and feel of their timers for personal use or for streaming runs to platforms such as Twitch or YouTube. After saving their layout configuration as an LS1L file, they can reload it later or share it with others. By sharing LS1L files, runners can distribute standardized layouts for events, races, or community challenges. NOTE: To create an LS1L file with LiveSplit One, select Layout → Export .

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.LS1L File Extension

LiveSplit One Layout

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What is an LS1L file?

An LS1L file is a layout file used by LiveSplit One, a browser-based timer for speedrunning. It stores information in the JSON standard about how the timer and other elements are displayed during a speedrun. LS1L files may include layout components such as the timer display, split list, title, comparison information, and background settings.

More Information

LS1L file open in LiveSplit One

Speedrunners and content creators are the primary users of LS1L files. They use these files to customize the look and feel of their timers for personal use or for streaming runs to platforms such as Twitch or YouTube.

After saving their layout configuration as an LS1L file, they can reload it later or share it with others. By sharing LS1L files, runners can distribute standardized layouts for events, races, or community challenges.

NOTE: To create an LS1L file with LiveSplit One, select Layout → Export .

How to open an LS1L file

You can open LS1L files with LiveSplit One via a web browser. To open an LS1L file with LiveSplit One, select Layout → Import and choose the LS1L file you want to upload to open.

Since LS1L files store plain text, you can open them with a text editor, such as Microsoft Notepad or Apple TextEdit .

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Programs that open LS1L files

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Windows

Microsoft Notepad

Included with OS

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Apple TextEdit

Included with OS

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gedit

Free

Web

LiveSplit One

Free

Category: Settings Files

Updated: September 22, 2025

FAQ

What is an LS1L file?↓
An LS1L file is a layout file used by LiveSplit One, a browser-based timer for speedrunning. It stores information in the JSON standard about how the timer and other elements are displayed during a speedrun. LS1L files may include layout components such as the timer display, split list, title, comparison information, and background settings.
How do I open an .ls1l file?↓
You can open LS1L files with LiveSplit One via a web browser. To open an LS1L file with LiveSplit One, select Layout → Import and choose the LS1L file you want to upload to open.

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