JediMock
Intercepts and mocks API responses in the browser via a console script, with wildcard matching, merge/replace modes, response rules, fallback, and async ID support.
A browser DevTools extension that mocks API responses by intercepting fetch and XMLHttpRequest requests via a console script, solving the problem of unavailable or unchangeable backends. It targets frontend developers and QA engineers who need to test edge cases, demo features, or reproduce bugs without backend support. Unlike tools requiring service workers, proxies, or certificates, it operates with zero footprint in the app and leaves no trace after refresh, with a free, no-account model.
Key features
- Intercepts fetch and XMLHttpRequest
- Wildcard URL matching
- Merge or replace responses
- Response rules for call sequences
- Fallback mode on timeout
- Async ID capture and injection
- Tree-based JSON editor
- Bulk JSON editor with schema view
- Validator with line-level errors
- Diff and beautifier
- Import/export configs
- Share mocks via URL
- No social media activity within the last 30 days
GTM channels
- No GTM activity detected
ICP
- Software developers
- Engineering teams