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Top 23 JavaScript OpenAPI Projects
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Project mention: Deep Dive: How Bruno 1.0 Stores API Tests Locally vs. Postman 11.0 Cloud Sync | dev.to | 2026-04-28
After 6 months of benchmarking, case study analysis, and real-world testing, our recommendation is clear: choose Bruno 1.0 if you are an engineering team that values performance, Git integration, and zero vendor lock-in. Our data shows Bruno outperforms Postman 11.0 in every local storage metric: 400ms faster startup for 1000+ test suites, 6x lower storage overhead per test, and zero sync latency. The case study above shows teams can save $2k+ per year in licensing costs and $18k+ per year in engineering time by switching to Bruno. For teams with heavy non-technical collaboration needs, or very small test suites (<100 tests), Postman 11.0’s free tier remains a viable option, but we recommend exporting collections to Bruno for all engineering use cases. The API testing landscape is shifting toward local-first tools to avoid cloud vendor lock-in, and Bruno 1.0 is leading that charge. Try Bruno today: download it from https://github.com/usebruno/bruno, and migrate your Postman collections in minutes using the native import tool.
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swagger-ui
Swagger UI is a collection of HTML, JavaScript, and CSS assets that dynamically generate beautiful documentation from a Swagger-compliant API.
Most of the content is the same as what is written here.
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Shuffle
Shuffle: A general purpose security automation platform. Our focus is on collaboration and resource sharing.
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For code-first approaches, libraries like swagger-jsdoc let you generate OpenAPI specs from code comments:
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Project mention: OpenAPI Specs automatisch in saubere Markdown-Doku konvertieren | dev.to | 2026-06-15
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speakeasy
Build APIs your users love ❤️ with Speakeasy. ✨ Polished and type-safe SDKs. 🌐 Terraform providers, MCP servers, CLIs and Contract Tests for your API. OpenAPI native. (by speakeasy-api)
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tuya-homebridge
Homebridge custom plugin for controlling Powered by Tuya (PBT) devices in HomeKit. This plugin is officially maintained by the Tuya Developer Team.
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chevron
Powerful and highly functional startpage integrated with chatGPT and hidden under the super minimalistic and animated design (static/hosted/github pages)
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fastify-openapi-glue
A plugin for the Fastify webserver to autogenerate a Fastify configuration based on a OpenApi(v2/v3) specification.
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api2html
A CLI tool to transform Swagger/OpenAPI/AsyncAPI docs to beautiful HTML pages via Shins/Widdershins.
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
JavaScript OpenAPI discussion
JavaScript OpenAPI related posts
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OpenAPI Specs automatisch in saubere Markdown-Doku konvertieren
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Total monthly number of StackOverflow questions over time
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Ask HN: What developer tool do you wish existed in 2026?
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Stoplight Alternatives Developers Actually Work with
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Generating OpenAPI API clients for Angular
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Mastering API Definitions: A Comprehensive Guide
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Top 8 Swagger Codegen Alternatives
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A note from our sponsor - SaaSHub
www.saashub.com | 17 Jun 2026
Index
What are some of the best open-source OpenAPI projects in JavaScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | bruno | 44,862 |
| 2 | swagger-ui | 28,841 |
| 3 | Shuffle | 2,322 |
| 4 | platformatic | 2,012 |
| 5 | swagger-jsdoc | 1,787 |
| 6 | widdershins | 1,577 |
| 7 | swagger-parser | 1,200 |
| 8 | openapi-to-postman | 1,052 |
| 9 | open-api | 921 |
| 10 | create-openapi-repo | 692 |
| 11 | generator-express-no-stress | 601 |
| 12 | hugo-theme-relearn | 600 |
| 13 | Arazzo-Specification | 440 |
| 14 | speakeasy | 419 |
| 15 | tuya-homebridge | 393 |
| 16 | chevron | 389 |
| 17 | main | 312 |
| 18 | fastify-openapi-glue | 250 |
| 19 | openapi-snippet | 128 |
| 20 | open-api-mocker | 127 |
| 21 | api2html | 120 |
| 22 | box-openapi | 101 |
| 23 | openapi-examples-validator | 61 |
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