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Charles vs HTTP Toolkit: catalog facts
Charles	HTTP Toolkit
Paid Commercial software with licences sold on the official site.	Free Open-source desktop app that is free to download.
Windows, macOS, Linux	Windows, macOS, Linux
Shows full HTTP and HTTPS requests, responses and headers Works as a reverse proxy as well as a monitor	One-click interception for many tools and platforms Can target traffic from a single client
Paid licence required HTTPS inspection needs certificate setup on the client	Desktop only; no mobile app to run it on a phone Aimed at developers rather than general users
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
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 23, 2026	Official website Full listing and sources Checked September 23, 2026

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