Unlike Header Editor, Requestly is well mantained, mv3 compliant tool built for real developers and QA teams. It intercepts, modifies, and mocks HTTPs traffic in real time, both in-browser and on your desktop apps.
Fast & Powerful
Free Header Rules
24/7 Expert help
HTTP Header modifications are free in Requestly. Claim 1 yr free Requestly pro plan for other modifications. (save ~$10k)
Why choose Requestly over Header Editor
Requestly is a modern, open-source, browser-first tool that goes beyond header editing, no complex setup, no trust issues, and packed with features for both developers and teams.
Actively Maintained
Free Header Modifications
Gentle Learning Curve
Simple, Fast & Powerful
Collaboration & 1-Click Sharing
Popular Use Cases
Modify/ Bypass CORS
Bypass CORS errors during development by modifying response headers locally, without changing anything on the server.
Set Authorization Header
Inject auth tokens into request headers to test APIs without logging in or changing your code.
Modify Cookie Header
Add, modify, or remove Cookie headers in requests to fake sessions, test edge cases, or debug issues, no need to touch your browser storage.
Frequently Asked Questions
There are frequently asked questions related to Requestly
What is Requestly and how is it different from Header Editor ?
Requestly is a powerful HTTP interception and mocking tool that lets you intercept, record, and mock HTTP requests on the fly. While Header Editor is limited to modifying headers, Requestly goes much further, allowing you to redirect URLs, override API responses, inject scripts, block requests, and collaborate with your team using a modern UI.
Is Requestly more secure than Header Editor?
Yes. Requestly is designed with enterprise-grade security in mind, including features like role-based access control (RBAC), single sign-on (SSO), and SOC 2 compliance. Header Editor is a basic browser extension with minimal security features and limited control over your data.
Is Requestly open-source
Is Requestly free to use ?
Yes. Requestly offers a Free plan with essential features like unlimited header rules and standard HTTP modifications, perfect for getting started.
Does Requestly offer an enterprise plan?
Yes. Requestly offers an Enterprise Plan built for larger teams and organizations that need full control and compliance. It includes unlimited usage, API access, SSO & SAML, GDPR and SOC 2 compliance, user access management, SLAs for support and uptime, invoice-based billing, and priority support via Slack Connect, Email, and Chat.
Is Requestly free for students?
Yes! Requestly is free for students, enjoy access to powerful tools and features with no cost.
Why are my response header modifications not visible in the browser’s dev tools?
Why Aren’t My Requestly Rules Working?
How do I modify headers using Requestly?
Can I apply header modifications to specific HTTP methods (GET, POST, etc.)?
Yes, you can apply header modifications to specific HTTP methods by specifying the method condition within the rule settings. This ensures that headers are modified only for requests of certain types. For a detailed guide,.
Can I import my Header Editor settings directly into Requestly?
Yes, Requestly supports one-click migration to seamlessly import your Header Editor settings, making the transition quick and easy.
Built for teams
Effortless team collaboration
Secure and private
Enterprise-ready security and compliance
