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Fiddler Classic vs Proxelar: catalog facts
Fiddler Classic	Proxelar
Free Free for eligible non-commercial use; commercial use points to the paid Fiddler…	Free Free and open source under the MIT licence.
Windows	Windows, Command line
Captures and decrypts HTTPS traffic for inspection Lets you modify requests and responses	Handles HTTP, HTTPS and WebSocket traffic Replay and rewrite of requests, not just inspection
Licensed only for eligible non-commercial use Windows only	HTTPS interception requires trusting a local certificate Command-line focused rather than a full desktop GUI
Downloadable app	Downloadable app
Closed source	Open source
License: Proprietary	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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