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jless vs fx: catalog facts
jless	fx
Free The open-source application is available without a license fee.	Free The open-source software is available without a license fee. Hosting, hardware and…
macOS, Linux, Command line	Windows, macOS, Linux, Command line
Collapsible trees and regex search	Lets you explore structured data without opening a separate editor.
Native Windows support is not yet available.	Requires terminal use and valid input data.
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.