Open-Source Alternatives
Free Alternative to Postman
10 free & open-source projects that replace Postman.
Compare at a Glance
Top 8 of 10| vs Postman |  curl |  it-tools |  insomnia |  cyberchef |  openapi-generator |  hey |  apihub |  requestly |
|---|---|---|---|---|---|---|---|---|
| Stars | 43k | 41k | 40k | 36k | 27k | 21k | 9.8k | 6.8k |
| Forks | 7.4k | 5.5k | 2.4k | 4.2k | 7.7k | 1.3k | 1.5k | 691 |
| Contributors | 30 | 30 | 30 | 30 | 30 | 30 | 25 | 30 |
| Last Commit | Sep 1, 2026 | Mar 5, 2026 | Jun 18, 2026 | Mar 6, 2026 | Sep 1, 2026 | Jan 10, 2026 | May 5, 2026 | Mar 6, 2026 |
| License | NOASSERTION | GPL-3.0 | Apache-2.0 | Apache-2.0 | Apache-2.0 | Apache-2.0 | NOASSERTION | AGPL-3.0 |
| Language | C | Vue | TypeScript | JavaScript | Java | Go | JavaScript | - |
Tired of complex JSON parsing or relying on heavy GUI tools?
Meet fx, the Unix-like coding agent that transforms how you interact with JSON directly from your terminal. It brings powerful, interactive visualization and manipulation capabilities to your command line, making data inspection intuitive and efficient for developers on macOS, Windows, and Linux.
- 🔍 Interactive JSON viewer
- 🎨 Syntax highlighting
- ⚡ Fast search & filter
- 🌳 Collapse/expand nodes
- 💻 Cross-platform support
Stop paying for proprietary tools. fx is free, open-source, and available forever.
Discover a smarter way to handle JSON with fx on Fossy today! https://fossy.dev/vercel-labs/fx
#OpenSource#JSON#DeveloperTools#CLI#CodingAgent#Fossy#FreeSoftware
