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Cross-Device testing with User-Agent modification

Advanced Request matching

Change to Any User Agent

Trusted by 300,000+ developers from Fortune 500 companies.

Change User-Agent Strings Without Leaving Your Browser

Simulate requests from different browsers, devices, or bots by customizing the User-Agent header. Great for testing responsive design, browser-specific behavior, or geo-targeted content.

Custom User Agents

Choose from Preset User Agents

Easily switch between popular device user agents like iPhone, iPad, Android, and desktop browsers. Learn more ->

Promote consistency and accelerate development by sharing Requestly rules within your team.

More features for your testing needs

These HTTP Rules designed for all your local development and testing needs. Modify Responses Intercept, Modify & Mock API Responses in Real-Time Replace string Replace part of URL like hostname, query values. Redirect URL Redirect any URL to a new destination. Modify Headers Modify HTTP request & response headers. Query params Add or Remove Query Parameters Insert scripts Inject Custom JS & CSS on any website(s). Delay network Simulate delay in response of API calls. Modify request body Modify body of website or application POST requests.

Effortless team collaboration

Share instantly, sync effortlessly, and collaborate effectively with your team in dedicated workspaces.

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Quick One time sharing

Instantly generate and share a link to your rules and more

Team workspaces

Collaborate easily with teammates in a shared workspace.

Export data & sync to Git

Easily version-control your configs by exporting and syncing

Secure and private

Enterprise-ready security and compliance

Requestly ensures top-tier security with SOC-II compliance, SSO integration, and role-based access control. We protect your data and secure your workflows, making us the ideal choice for enterprises.

SOC-II Compliance

Adheres to rigorous security standards for data protection and privacy.

Single Sign-On (SSO)

Simplifies user access with secure, centralized authentication.

Role-based access control

Ensures precise control over user permissions and data access.

Data encryption

Protects your data in transit and at rest with advanced encryption protocols.

Audit logs

Tracks and records user actions and system events, giving you complete visibility.

Regular security updates

Keeps your environment secure with timely updates and patches.

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Ready to try it yourself?

Intercept, modify and mock HTTP requests in your browser or on desktop. Free to use.

Download Requestly Free See pricing

Free · macOS, Windows & Linux