Open Source

Insert, Modify or Delete query parameters for URLs
(or matching pattern)

Inserting Query Params automatically in a URL becomes extremely easy with Requestly. Just enter the parameter and its value and you’re done!

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4.8 ⭐ 1,000+ reviews, 200,000+ developers

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Desktop Clients

Modify Multiple Query Params

User-friendly interface that makes it easy to add and modify query params on the go without requiring any extensive setup or technical knowledge.

Bust Cache

Using query params, you can burst cache for a request by assigning it a newer version.

1-Click Sharing

After creating the rules, you can share the rules with your teammates in a Single click using the SharedList feature. Read More

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Intercept & Modify HTTP Requests

Boost Your Web Development: Advanced Tools for Seamless Debugging.

Redirect URL (Map Remote)

Redirect a request URL  to another URL. e.g. Load local scripts in the production sites for faster debugging.

Override API Response

Test edge cases in your app by simulating API responses‍. Override XHR, fetch and AJAX responses.

Inject Custom Scripts

Add Custom JavaScript (JS) to Hide unwanted sections, add action buttons, inject your own libraries, etc.

Modify HTTP Headers

Add, Delete, Override Request & Response Headers. Can be used to remove X-Frame-Options, Content-Security-Policy, CORS Issues, etc.

Modify Query Params

Insert, Modify or Delete query parameters for URLs (or matching pattern). Burst cache for a request by assigning it a newer version.

Delay HTTP Requests

Simulate lag / delay to the response from specific URLs in a single click by using Requestly’s Delay Request Rule. No need to modify actual server.

More from Requestly

An open-source platform that speeds up your web development cycle 10X faster.

Session Recording

Data rich bug reporting with Network logs, Console logs, Session Video and environment details. Share it with your Engineering team for faster debugging.

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Mock API Server

Generate custom API responses without actually having a pre-built API or a backend server. Edit Content-Type, Status Code, Headers, and Response body easily on the Mock Server.

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Web-based API Client

A comprehensive and web-based tool for modifying and testing APIs. You can test the Mock APIs you’re creating here to fast track your development lifecycle.

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For the developers, by the developers ❤️

From Debug to Deploy: Developers Trust Requestly

Absolutely insane level of customisation and flexibility. Used this on a number of different use cases and love it. Works great and I found the UX fantastic. Nice job!

Dan Mindru
Founder of Shipixen

Love using Requestly to swap versions of Adobe Launch from Prod to Staging and Dev. And also blocking various martech scripts to analyze their impacts on CWV(Core Web Vitals).

Arthur Engelhard
Senior Digital Implementation Manager at Newfold Digital

We used this to delay API responses and modify params received to see how front end would handle them – this allowed front end to re-create a range of scenarios without wasting any back enders time. Did exactly what we needed it to, would recommend

Mark Mekhaiel
Lead developer at pirate.com