Requestly is a better alternative to ModHeader

4.8 ⭐ 1100+ Ratings, 200,000+ users

Modify Headers easier than ModHeader
Play Video about Modify Headers easier than ModHeader
Trusted by 200k+ developers at →

Learn why people choose

Requestly over ModHeader

1. No ads, No Spam, and We’re Open Source

Requestly puts privacy first with its “No ads, No Spam, Open Source” approach. The open-source nature of Requestly allows for greater transparency strengthening trust in how the tool handles your information.

Larger set of modification rules than ModHeader

2. Modify more than HTTP Headers

Requestly supports request/response HTTP Headers manipulation and other parts of a request and response. Requestly is a complete HTTP Interception tool for browsers, helping frontend developers develop & test faster.

3. Best Customer Support

Requestly is known to provide the best customer support to its customers. Requestly has more than 1000 reviews on the Chrome Store testifying the best support from the Requestly team.

More Powerful than ModHeader

4. Simple, Fast & Powerful than ModHeader

Requestly provides a user-friendly and modern interface curated by UX experts.  It is available in two forms — a browser extension & a desktop application for all major platforms like Chrome & Chrome-based browsers, Firefox, Safari, Edge, Brave, Opera, Vivaldi, Windows, Mac(Apple & Intel Chips), and Linux.

5. Gentle Learning Curve

Requestly is designed from bottom up to maintain a shallow learning curve. Moreover a detailed documentation, a learning academy, interactive guides & video tutorials make you a power user from Day 1.

6. Collaboration

Requestly is designed with collaboration with the team and across teams in mind, you can create groups, share groups, and sync rules across team members. So that a rule once created can be used by all team members.

7. GraphQL Support

Exclusive support for GraphQL APIs is available in Requestly as tools made for REST API like ModHeader can’t fiddle with specific operations of GraphQL, additional filtering is required.

8. Enterprise Ready


Requestly is enterprise-ready software and offers features like SSO, Team Management, SLAs, SOC-II compliance, Reporting and analytics, and Role-based access control.

The Key Difference

ModHeader is a simple, ad-supported extension ideal for modifying HTTP headers. It’s perfect for those who need a focused header-editing tool and don’t mind the presence of ads.

Requestly is a powerful, open-source web development, mocking, and debugging suite. It’s ideal for teams and individuals who value privacy, a user-friendly interface, and top-notch support.

Additional Features of Requestly

for frontend & QA teams

Detailed Comparison of Requestly & ModHeader


Mod Header


No Ads, No Spam

Open Source


Modify HTTP Headers

Modify API Response

Modify URL

GraphQL Support

Inject Scripts

Page Level Filters


Team Workspaces

Mock Server

API Client



For the developers, by the developers ❤️

From Debug to Deploy: Developers Trust Requestly

I’m a big fan of Requestly, and use it on a daily basis as a QA Engineer. It removes the need to use Charles Proxy often, which is always nice. I can just use Requestly directly in Chrome

Mike Mitchell
QA Engineer at URBN

Awesome tool. I use it almost daily for my projects to modify request body, headers, etc. Would recommend it to every frontend developer out there. Thank me later 🙂 (Case Study)

Harsh Vats
Frontend Engineer at PingSafe

This is by far the best tool for managing request headers! Plus the developers are very active meaning you’ll get help if you’re ever stuck or need help solving a problem. I use it daily and couldn’t be happier.

Jose Browne
Senior Engineer at Reddit

App works as expected! Ran into some small issues while creating the rules but the support team was able to help and overcome those.

José Miguel Dias Fernandes
Development Lead at Vodafone

Requestly is user-friendly, brilliant and easy-to-use. I use it on an daily basis and it makes my work easier. After using other tools like Charles – Requestly is a nice new breath of air that I highly vouch for. Apart from the tool being amazing – the support from the Requestly team is phenomenal with them always going above and beyond for their clients.

Marius Ludick
Solutions Architect II at Amazon

Requestly is an amazing tool to get your development work less hassle. The product itself has evolved so much since day-1 and the company is really serious on helping their customer solves their problems. We had this nice session where they shared Requestly features and we were very impressed on its potential. A truly 5-star worthy.

Natchapol Thongruang
Senior Software Engineer at Agoda

Just loved the way Requestly saved several person hours for our dev team by allowing us to redirect and intercept requests. The simple yet efficient rules allowed us to seamlessly redirect requests from a single staging front-end server to local backend servers. This meant that our devs didn’t need to build or run the front-end server locally when focusing on backend tasks.

Srijan Bhatnagar
Senior Software Engineer at Atlassian

Requestly is awesome. I used to use Charles proxy in my day-to-day work but it always messed with my wifi. I haven’t had any issues with Requestly. Requestly’s UI is an amazing tool and great to work in.

Carl Hand
Senior Software Engineer at Workday

Requestly not just made it easier for us to develop, test & debug our code on our customer sites but also helped us do engaging product demos to our prospective clients.

Michael Levinson
Co-Founder & CPO at Joyned