Octane is the premier Rocket League replay parser. Rocket League Replays parses tens of thousands of replays with it. Octane parses most replays in less than 5 seconds. It outputs easy-to-read JSON.

That being said, Octane is not actively developed anymore. Consider using Rattletrap (which is actively developed) instead. Rattletrap can also generate replay files from JSON, which Octane cannot do.

Octane has a command-line interface. To get it, download and unpack the latest release for your platform. You can run the executable one of three ways:

1. Pipe a replay file into it. It will output a compact JSON object to standard out.

   $ octane < a.replay > replay.json

2. Pass it a path to a replay file. Both file paths and URLs work. It will output a compact JSON object to standard out.

   $ octane a.replay > replay.json
   $ octane https://media.rocketleaguereplays.com/uploads/replay_files/9A06783F4FEA7AFF3D8298A3E5A412F5.replay > replay.json

3. Pass it several paths to replay files. Both file paths and URLs work. It will output a compact JSON array of objects to standard out.

   $ octane first.replay second.replay > replays.json

Rocket League saves your replays in a folder that depends on your operating system.

• Windows: %UserProfile%\Documents\My Games\Rocket League\TAGame\Demos
• macOS: $HOME/Library/Application Support/Rocket League/TAGame/Demos
• Linux: $HOME/.local/share/Rocket League/TAGame/Demos

Octane is written in Haskell. If you're looking for a library written in another language, check out the Rocket League Replays wiki. It has links to many other Rocket League replay parsers.