The Bottom Line
Best for
Web developers and QA engineers who need to modify headers, redirect requests, or mock API responses while building or testing a web app.
Entry price
Free plan available, paid tiers above
Biggest con
Teams needing to intercept traffic outside the browser, tweak only sees requests made from browsers not native or mobile apps
TL;DR - tweak
- Free plan includes 12 rules; Premium is $36/year with a 7-day trial
- Available for Chrome, Edge, and Firefox, 80,000+ users on Chrome as of Septembe…
- Header rules support Active Tab or Global scope with regex matching
Top Pros
- Modify headers rule type — set, append, or remove request or response headers,…
- Redirect rule type with regex and capture groups
- Mock API responses locally — no proxy or backend server required
Top Cons
- Teams needing to intercept traffic outside the browser, tweak only sees requests made from browsers not native or mobile apps
What is tweak?
Available on: Web, Desktop
Pros & Cons
Cons
- Teams needing to intercept traffic outside the browser, tweak only sees requests made from browsers not native or mobile apps
Preview
Key Features
Pricing Plans
Free TrialPricing checked Sep 18, 2026
Free
For individual developers testing and mocking APIs
- Up to 12 mock/modify rules
- Modify response headers
- Redirect requests
- Auto-enabled sites
Premium
$36/year
Unlimited rules plus advanced tooling
- Modify request data
- Modify responses & request headers
- Custom JavaScript snippets
- Collections
- Variables
- Random data generators
Is tweak worth the price?
The pricing is fair and generous for individual developers, with a free tier that covers basic mocking and a Premium tier at $36/year offering unlimited rules and advanced features.
It is cheaper than most API mocking tools, making it best for solo devs and small teams who want a low-cost, powerful extension.
Hidden Costs & Gotchas
Free tier limited to 12 rules, exceeding requires $36/year
No monthly payment option, only annual $36 upfront
Advanced features like custom JS and collections locked to Premium
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Still deciding?
Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.
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Source: tweak-extension.com