Open source alternatives to Fiddler

One project on starwire does the same job. Ranked by how much of what Fiddler does each one covers, read from its README and website. Ties go to the most active.

What Fiddler does

Capture HTTP and HTTPS trafficcore
Inspect and edit requests and responsescore
Replay and compose requests
Auto-responder rules to mock responses
Debug mobile device traffic
Export sessions

Each dot in the table is one job, in this order. Square dots are core jobs and count double. Full means yes, half means partly. "See the evidence" under a project shows the line behind each one. Coverage is what a project documents, not how well it works or how hard it is to move to. How we score this

Project	Covers	Stars	Commits, 12 weeks	Last release	Closed vs opened	Setup	License
mitmproxyInteractive intercepting proxy for inspecting and modifying TLS and HTTP traffic	Replaces it81%	47k+233	73	20 days ago	100%	Runs in a browser	MIT
Covers all 2 core jobs. Partly: Auto-responder rules to mock responses; Debug mobile device traffic; Export sessions.See the evidence Capture HTTP and HTTPS trafficcoreYesintercept, inspect, modify and replay web traffic Inspect and edit requests and responsescoreYesintercept specific messages on-the-fly, modify them Replay and compose requestsYesreplay them to a client or server later on Auto-responder rules to mock responsesPartlyWrite powerful addons and script mitmproxy with mitmdump Debug mobile device trafficPartlya similar experience for any other application or device Export sessionsPartlyautomatically converting mitmproxy captures to OpenAPI 3.0 specifications

Vital signs from GitHub, checked weekly. How we read these · How setup is read

These also replace

Charles Proxy2

All repos

Sort

Form Platform Works with Theme License Setup Language

New repos every two days, stars refreshed daily. Visits are counted without cookies, and the numbers are public. How it works Data RSS Newsletter