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HTTP Toolkit vs Charles: catalog facts
HTTP Toolkit	Charles
Free Open-source desktop app that is free to download.	Paid Commercial software with licences sold on the official site.
Windows, macOS, Linux	Windows, macOS, Linux
One-click interception for many tools and platforms Can target traffic from a single client	Shows full HTTP and HTTPS requests, responses and headers Works as a reverse proxy as well as a monitor
Desktop only; no mobile app to run it on a phone Aimed at developers rather than general users	Paid licence required HTTPS inspection needs certificate setup on the client
Downloadable app	Downloadable app
Open source	Closed 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.