Best HTTP Clients in 2026

The Collaboration Platform for API Development.

Key Postman features:

User-Friendly Interface Collaboration Comprehensive Testing Tools Extensive API Documentation

Open Source

incident management, error monitoring, alerting, on-call, devops, developer tools, webhooks, mobile.

Key Woopy features:

Crash push notifications One-tap remediation actions Signed webhooks Action run history

Visit website freemium $9.0 / Monthly (PRO - up to 10 apps)

HTTP, HTTP2, HTTPS, Websocket debugging proxy.

Design, debug, test, and mock APIs locally, on Git, or cloud. Build better APIs collaboratively for the most popular protocols with a dev‑friendly UI, built-in automation, and an extensible plugin ecosystem.

Key Insomnia REST features:

User-Friendly Interface Support for Multiple Protocols Environment Management Custom Plugins and Themes

Open Source

Karve is a fast, native Windows workspace for the .http and .rest files already scattered across your repos. Organize, run, and inspect API requests offline - no account, no subscription.

Key Karve features:

Native Performance Offline Functionality Files Easy to Use

paid Free Trial $39.99 / One-off

CLI HTTP that will make you smile. JSON support, syntax highlighting, wget-like downloads, extensions, and more.

Key HTTPie features:

User-Friendly Syntax JSON Support Cross-Platform Plugin Support

Open Source

Fiddler is a debugging program for websites.

Key Fiddler features:

Comprehensive Debugging Cross-Platform Compatibility Custom Scripting User-Friendly Interface

mitmproxy is an SSL-capable man-in-the-middle proxy for HTTP.

Key mitmproxy features:

Open Source Interactive Interface Scripting Support Cross-Platform

Open Source

HTTP proxy / HTTP monitor / Reverse Proxy.

Key Charles Proxy features:

Comprehensive HTTP/HTTPS Debugging User-Friendly Interface Support for Various Platforms Throttling Feature

Paw is a REST client for Mac.

Key RapidAPI for Mac features:

User Interface Team Collaboration Advanced Request Capabilities Extensions and Plugins

Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.

Key Proxyman.io features:

User-Friendly Interface Cross-Platform Support Real-time Traffic Interception HTTPS Decryption

Open Source $49.0 / Annually

cURL is a computer software project providing a library and command-line tool for transferring data...

Key cURL features:

Versatility Cross-Platform Command-Line Usage Automation

Open Source

Beautiful, cross-platform & open-source tools to debug, test & build with HTTP(S). One-click setup for browsers, servers, Android, CLI tools, scripts and more.

Key HTTP Toolkit features:

Ease of Use Cross-Platform Compatibility Open Source Comprehensive Debugging Features

Open Source freemium €7.0 / Monthly (for a Pro subscription)

Bruno is a Git-integrated, fully offline, and open-source API client.

Key Bruno features:

User-Friendly Interface Comprehensive Feature Set Regular Updates Strong Customer Support

Open Source