Steam Market History Cataloger is a Chrome extension developed by Julia. It falls under the category of Browsers and the subcategory of Add-ons & Tools. This free extension indexes your Steam Market transactions, allowing you to view them within the extension and export them to JSON and CSV formats.

The extension provides a user-friendly way to load and store your listings from the Steam Community Market. Unlike Steam, which doesn't offer transaction data in an easily consumable format, this tool aims to fulfill that role by allowing you to access and filter your data in a neat and responsive format.

Some key features of Steam Market History Cataloger include the ability to load transactions from the Steam Community Market in any language or currency, storing them locally in your browser for future use. You can also export transaction data to JSON or CSV formats. Additionally, the extension allows you to load purchase history from your Steam account history, although this data is not persisted within the extension.

For convenience, Steam Market History Cataloger offers options for background loading, allowing you to automatically load transactions at regular intervals. The extension also provides additional options for navigating your history pages on the Steam Community Market website.

Please note that Steam Market History Cataloger is not affiliated with Valve or Steam, but it serves as a valuable tool for users who need extensive information about their Steam Market transactions.