Privacy-Focused REST API Testing in Your Browser
Test REST APIs in your browser • No account required • Works offline • Open source
Launch our HTTP client directly in your browser - no installation required
Works in Chrome, Firefox, Safari, Edge
A powerful alternative to Postman and Insomnia with complete privacy control
All HTTP methods (GET, POST, PUT, PATCH, DELETE, HEAD, OPTIONS) with custom headers and request bodies.
Organize requests into collections, run them sequentially, and share with your team via JSON export.
Define collection-level variables and use ${variableName} syntax for dynamic values across requests.
Write pre-request and post-request scripts to automate workflows and extract response data.
Track all requests and collection runs. Filter by success/failure and reload previous requests.
Work on multiple API requests simultaneously with full tab support and state management.
All data stored locally in your browser. No external servers, no account required, no tracking. Test APIs completely offline. You control your data.
Beautiful syntax highlighting for JSON, XML, HTML responses with automatic formatting.
Share collections as JSON files. Easy backup and team collaboration.
Test REST endpoints during development with all HTTP methods (GET, POST, PUT, DELETE) and custom configurations. Perfect Postman alternative for local development. Build and debug APIs faster with instant feedback, syntax highlighting, and organized collections. Whether you're developing microservices, RESTful APIs, or GraphQL endpoints, HITOP provides all the tools you need without the overhead of desktop applications.
Validate API responses, automate test workflows with pre/post-request scripts, and track request history. No account needed to start testing. Create comprehensive test suites with collection runners, verify response data with custom scripts, and maintain detailed request history for debugging. Perfect for regression testing, integration testing, and continuous quality assurance workflows.
Monitor services, run health checks, and automate API testing. Works completely offline for secure environments. Deploy HITOP in air-gapped networks, test internal APIs without internet connectivity, and maintain full control over your testing infrastructure. Ideal for enterprise environments with strict security requirements and compliance needs.
Test APIs without sending data to external servers. All collections and variables stored locally in your browser. Perfect for sensitive projects. Unlike cloud-based alternatives, HITOP never transmits your API keys, authentication tokens, or request data to external servers. Your sensitive information stays on your machine, giving you complete privacy and security control.
HITOP is a modern, browser-based HTTP client for REST API testing that runs entirely in your web browser. No installation, no account creation, no data sent to external servers. Simply open the app and start testing your APIs immediately.
Click the "Launch Web App" button and HITOP opens instantly in your browser. Works on Chrome, Firefox, Safari, and Edge. No downloads, no installations, no setup required. You can also install it as a browser extension for even faster access.
Enter your API endpoint URL, select the HTTP method (GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS), add custom headers if needed, and include a request body for POST/PUT requests. HITOP supports JSON, XML, form data, and plain text formats.
Group related API requests into collections for better organization. Create collections for different projects, environments, or API versions. Save requests for reuse, export collections as JSON files for backup or team sharing, and import collections from teammates.
Write JavaScript pre-request scripts to generate dynamic data, set authentication tokens, or modify headers before sending. Use post-request scripts to validate responses, extract data, or chain multiple requests together. Perfect for complex API testing workflows and automation.
Define collection-level variables for API keys, base URLs, or any reusable values. Reference variables using ${variableName} syntax in URLs, headers, or request bodies. Change environments easily by updating variable values without modifying individual requests.
Execute entire collections sequentially with the collection runner. Automate regression testing, run health checks, or validate API workflows. View detailed results for each request, including status codes, response times, and any script errors. Perfect for continuous integration and automated testing.
HITOP was built by developers, for developers, with a focus on privacy, simplicity, and productivity. Here's what makes this HTTP client different from Postman and other API testing tools.
No account creation, no email verification, no credit card required. Just click and start testing. Unlike Postman which requires account registration and login, HITOP lets you start working immediately. Perfect for quick API tests, debugging, or when you need to test an API right now without any setup delays.
Your API keys, authentication tokens, and request data never leave your browser. Everything is stored locally using browser storage. No cloud sync, no external servers, no data collection. This makes HITOP ideal for testing internal APIs, working with sensitive data, or complying with strict security policies.
Once loaded, HITOP works completely offline. Test localhost APIs, work on airplanes, or in secure environments without internet access. Your collections and request history are always available, even without connectivity. Perfect for developers who work in restricted networks or need reliable offline functionality.
No heavy desktop application to download or update. HITOP runs directly in your browser with minimal resource usage. Fast startup, instant response, and smooth performance even on older machines. The entire application is optimized for speed and efficiency.
Clean, intuitive interface designed for productivity. Syntax highlighting for JSON, XML, and HTML responses. Multiple tabs for working on several requests simultaneously. Keyboard shortcuts for common actions. Everything you need, nothing you don't.
HITOP is open source under the MIT License. No premium tiers, no feature limitations, no usage restrictions. Use it for personal projects, commercial work, or enterprise applications. Fork it, modify it, or contribute improvements. Completely free, forever.
Start testing your APIs with HITOP - no account required, complete privacy control
HITOP is an open source HTTP client and REST API testing tool under the MIT License. No cost, no restrictions. Contributions are welcome!