Stable release 1.0.0
Download Otter
Get the latest version of Otter and start building today.
Otter is free to use. It runs on Windows with the PowerShell already on your machine, and on macOS and Linux with PowerShell 7.
Download Otter 1.0.0
Download: Available
Download
Available
One zip for Windows, macOS and Linux. Check it against the SHA-256 checksum under Release details, extract it, and follow the installation guide - Otter needs nothing else installed.
System requirements
Operating system
Windows 10 or 11, 64-bit; macOS or Linux with PowerShell 7
Shell
Windows PowerShell 5.1 (built into Windows), or PowerShell 7 on macOS and Linux. Each program takes about 1-4 seconds to start, depending on your system and PowerShell start-up time.
Privileges
A standard user account. No administrator rights.
Additional software
None. A browser is only needed for web applications.
Release details
Version: 1.0.0 (Stable release)
Download size: 438 KB (otter-1.0.0.zip)
Release date: 2026-10-14
SHA-256: 62DC15966CC8C3454134C4A04071FEB06ADDC223A656367DF9F77700FE0839E1
Release notes: On GitHub with the download (Releases, v1.0.0).
Run from the project folder
Open Windows PowerShell in the folder that contains otter.cmd, then run an example:
PowerShell
.\otter.cmd examples\hello.ot
Output
Hello, Otter!