Updated: January 17, 2026
Chrome Add-on Requestly Review 2026
Need to mock APIs in Chrome without backend access? Requestly is the fastest way to intercept, modify, and fake HTTP requests—no proxy setup, no certificates, and no waiting on backend teams.
⚡ Quick Verdict
Requestly is the best free Chrome extension for API mocking in 2026. It replaces Charles Proxy for frontend developers who don’t need full traffic analysis. Open-source, 300K+ users, 4.6/5 rating. Mock APIs, modify headers, and redirect URLs—all from the browser toolbar.
Chrome Web Store Rating
Active Users
Core Features
This review covers Requestly’s features, limitations, pricing, and how it compares to ModHeader, Charles Proxy, LT Debug, and other alternatives. This review is based on six months of testing across various frontend projects.
What Is Requestly?
Requestly is an HTTP interceptor that runs as a browser extension. It lets you modify network requests without backend changes, proxy configuration, or desktop apps.
Core functions: redirect URLs, mock API responses, modify request/response headers, inject JavaScript/CSS, block requests, and record sessions for debugging.
Unlike Charles Proxy or Fiddler, Requestly operates entirely in the browser. No SSL certificates. No system-wide proxy setup. Install → create rule → done.
Who Is Requesting For?
| Best For | Not Ideal For |
|---|---|
| Frontend developers testing APIs | Mobile app traffic debugging |
| QA engineers mocking responses | Full network packet analysis |
| Teams needing shared debugging rules | Offline/air-gapped environments |
| Developers switching environments (prod → staging) | Enterprise security auditing |
Requestly Features: What It Actually Does
1. API Mocking
Define custom responses for any XHR/fetch request. Supports REST and GraphQL. Simulate 4xx/5xx errors, delayed responses, and edge cases without touching the backend code.
2. URL Redirect
Route requests from one URL to another. Common use: redirect production JavaScript to localhost for testing fixes against live data.
3. Header Modification
Add, remove, or modify HTTP headers on requests and responses. Useful for testing auth tokens, CORS headers, and custom headers without backend changes.
4. Script Injection
Insert custom JavaScript or CSS into any page. Similar to Tampermonkey but with more control over targeting specific URLs.
5. Session Recording
Capture video, console logs, network requests, and environment data. Export as HAR files for sharing with teammates.
6. Team Workspaces
Share rules across team members. Rules sync automatically. Import from Postman, Insomnia, and Charles Proxy.
Requestly Pros and Cons
✅ Pros
- Free core features (open-source)
- No proxy setup required
- GraphQL mocking support
- Team collaboration built-in
- Import from Postman/Charles
- Active development (weekly updates)
- Works on Chrome, Firefox, Edge
⚠️ Cons
- Browser-only (no mobile app traffic)
- Some features require account login
- Desktop app needed for system-wide use
- Complex rule chaining has learning curve
- Premium features locked behind paywall
- UI can feel cluttered with many rules
Requestly Pricing (January 2026)
| Plan | Price | Includes |
|---|---|---|
| Free | $0 | All core features, local rules, session recording |
| Plus | $12/month | Team workspaces (up to 3), priority support |
| Professional | $25/month | Unlimited team members, advanced analytics, SSO |
Note: Most individual developers won’t need paid plans. The free tier covers API mocking, header modification, and redirects.
How to Set Up Requestly (2 Minutes)
- Install: Search “Requestly” in Chrome Web Store → Add to Chrome
- Pin extension: Click puzzle icon → pin Requestly to toolbar
- Create first rule: Click Requestly icon → New Rule → select type (Redirect, Mock, Headers)
- Configure: Enter source URL pattern and target action
- Test: Open DevTools Network tab → trigger request → verify rule applied
Requestly vs Alternatives: Comparison Table
| Tool | Type | API Mocking | Learning Curve | Price | Best For |
|---|---|---|---|---|---|
| Requestly | Extension | ✅ Full | Low | Free/$12+ | Frontend debugging, API mocking |
| ModHeader | Extension | ❌ No | Very Low | Free | Simple header changes only |
| Charles Proxy | Desktop | ✅ Full | High | $50 | Full traffic analysis, mobile |
| LT Debug | Extension | ⚠️ Basic | Low | Free | Cross-browser testing via cloud |
| Hopscotch | Web app | ✅ Full | Low | Free | API testing (Postman alternative) |
| Resource Override | Extension | ⚠️ Basic | Very Low | Free | Simple file overrides |
Why Requestly Is the Best Charles Proxy Alternative for Frontend Developers
Charles Proxy is powerful—but it’s overkill for most frontend work. Here’s why developers are switching to Requestly:
| Pain Point | Charles Proxy | Requestly |
|---|---|---|
| Setup time | 15-30 min (certs, proxy config) | 2 min (install extension) |
| Cost | $50 license | Free |
| Team sharing | Export XML manually | Built-in workspaces |
| Learning curve | Steep (proxy concepts) | Low (browser-native UI) |
Charles Proxy is still the preferred choice for mobile app debugging, full SSL inspection, packet-level analysis, and enterprise security auditing. If you need these, pay the $50.
When Requestly wins, everything else frontend developers actually do daily—mocking APIs, switching environments, testing headers, and debugging CORS.
Best Requestly Alternatives (2026)
1. ModHeader
ModHeader is a lightweight extension that primarily modifies HTTP headers. No API mocking, no redirects. Best if you only need to add/remove headers for testing auth or CORS.
Best for: Simple header manipulation
2. Charles Proxy
Desktop app with full traffic analysis, SSL proxying, and mobile device support. More powerful but requires setup. $50 license.
Best for: Mobile debugging, enterprise use
3. LT Debug (TestMu AI)
The Chrome extension is integrated with the LambdaTest cloud. Record browser sessions and replay across 3,000+ browser-OS combinations. Better for QA than development.
Best for: Cross-browser testing
4. Hopscotch
Open-source Postman is an alternative. Web-based API testing without installation. It eliminates the need for browser interception and operates independently. This approach is better suited for API documentation and testing workflows.
Best for: API testing without browser extension
5. Resource Override
Simple extension for overriding static files. Less powerful than Requestly but an easier interface for basic redirect rules.
Best for: Basic file overrides
When NOT to Use Requestly
Skip Requestly if:
- You need to debug mobile app traffic (use Charles Proxy instead)
- You require full packet-level analysis (use Wireshark)
- You only modify headers occasionally (ModHeader is simpler)
- Your team requires on-premise deployment (self-hosted options limited)
Frequently Asked Questions
Is Requestly free?
Yes. Core features are free and open-source. Premium plans ($12-25/month) add team collaboration and priority support.
What is the best Requestly alternative?
Depends on use case. ModHeader for simple headers. Charles Proxy for full traffic analysis. LT Debug for cross-browser testing. Hopscotch for API testing.
Does Requestly work with GraphQL?
Yes. You can mock GraphQL responses by targeting operation names or query content.
Can Requestly intercept mobile traffic?
Not directly. The browser extension only intercepts browser traffic. Use the desktop app with a proxy configuration for mobile devices.
Is Requestly safe to use?
It’s open-source (auditable on GitHub). Local workspaces store data on your machine. Review their privacy policy for team/cloud features.
How does Requestly compare to Postman?
Different tools. Postman tests APIs outside the browser. Requestly intercepts live browser traffic. Use both together—they’re complementary.
Does Requestly slow down Chrome?
Minimal impact. Rules only trigger matching URLs. Users with 50+ active rules report no noticeable slowdown.
Can I export Requestly’s rules?
Yes. Export as JSON for backup or sharing. Import from Postman, Insomnia, Charles Proxy, and ModHeader.
Bottom Line
Requestly fills the gap between browser DevTools (read-only) and full proxies like Charles (complex setup). For frontend developers who mock APIs, switch environments, or debug headers, it’s the fastest path from “I need to test this” to “I’m testing this.”
Install the free version. Create one redirect rule. See if it fits your workflow. That’s the 2-minute test that tells you more than any review.
📚 Related Guides
Sources
- Chrome Web Store—Requestly Extension Page. chromewebstore.google.com
- Requestly Official Docs.: docs.requestly.com
- GitHub—Requestly Open Source. github.com/requestly
- Stack Overflow Developer Survey 2025. survey.stackoverflow.co
- JetBrains Developer Ecosystem 2025. blog.jetbrains.com
- TestMu AI—LT Debug. testmu.ai
- Charles Proxy, charlesproxy.com
- Hoppscotch—Open Source API Platform. hoppscotch.io