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Charles vs Fiddler Classic: catalog facts
Charles	Fiddler Classic
Paid Commercial software with licences sold on the official site.	Free Free for eligible non-commercial use; commercial use points to the paid Fiddler…
Windows, macOS, Linux	Windows
Shows full HTTP and HTTPS requests, responses and headers Works as a reverse proxy as well as a monitor	Captures and decrypts HTTPS traffic for inspection Lets you modify requests and responses
Paid licence required HTTPS inspection needs certificate setup on the client	Licensed only for eligible non-commercial use Windows only
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License: Proprietary
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 October 2, 2026

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