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Tags / Backend and APIs /

OpenAPI tool

A tool that generates, validates, or documents code from OpenAPI or Swagger specifications.

The 44repositories with this Tag gained +695 net stars in the last 30 days, 1% less than the 30 days before.

0 created in the last 90 days · 20 published a release in the last 30 days · 216K stars in total

All in the Repository Index On Trending

Net stars each day, last 30 days+114 last 7 days

Oct 6, 2026Nov 4, 2026

Most net stars, last 30 days

scalar/scalar

Scalar is an open-source API platform:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　🌐 Modern REST API Client　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　📖 Beautiful API References　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　✨ 1st-Class OpenAPI/Swagger Support

+165

24% of the net stars of this Tag

Largest Pace, last 30 days

No other repository gained 2 or more times the net stars of the 30 days before.

Most stars, created in the last 90 days

No other repository with this Tag was created in the last 90 days.

Where the stars went, last 13 weeks

Net stars gained each week. The repositories that gained the most have their own color.

scalar/scalar gained 27% of the net stars of this Tag in the last 13 weeks.

scalar/scalar, week to Aug 12: +69 net starsOpenAPITools/openapi-generator, week to Aug 12: +21 net starsRedocly/redoc, week to Aug 12: +28 net starsswagger-api/swagger-ui, week to Aug 12: +19 net starsoapi-codegen/oapi-codegen, week to Aug 12: +9 net starsAll other repositories, week to Aug 12: +82 net starsscalar/scalar, week to Aug 19: +60 net starsOpenAPITools/openapi-generator, week to Aug 19: +24 net starsRedocly/redoc, week to Aug 19: +23 net starsswagger-api/swagger-ui, week to Aug 19: +12 net starsoapi-codegen/oapi-codegen, week to Aug 19: +15 net starsAll other repositories, week to Aug 19: +89 net starsscalar/scalar, week to Aug 26: +57 net starsOpenAPITools/openapi-generator, week to Aug 26: +14 net starsRedocly/redoc, week to Aug 26: +11 net starsswagger-api/swagger-ui, week to Aug 26: +19 net starsoapi-codegen/oapi-codegen, week to Aug 26: +14 net starsAll other repositories, week to Aug 26: +59 net starsscalar/scalar, week to Sep 2: +47 net starsOpenAPITools/openapi-generator, week to Sep 2: +32 net starsRedocly/redoc, week to Sep 2: +15 net starsswagger-api/swagger-ui, week to Sep 2: +12 net starsoapi-codegen/oapi-codegen, week to Sep 2: +22 net starsAll other repositories, week to Sep 2: +80 net starsscalar/scalar, week to Sep 9: +48 net starsOpenAPITools/openapi-generator, week to Sep 9: +19 net starsRedocly/redoc, week to Sep 9: +14 net starsswagger-api/swagger-ui, week to Sep 9: +16 net starsoapi-codegen/oapi-codegen, week to Sep 9: +12 net starsAll other repositories, week to Sep 9: +67 net starsscalar/scalar, week to Sep 16: +54 net starsOpenAPITools/openapi-generator, week to Sep 16: +16 net starsRedocly/redoc, week to Sep 16: +15 net starsswagger-api/swagger-ui, week to Sep 16: +13 net starsoapi-codegen/oapi-codegen, week to Sep 16: +12 net starsAll other repositories, week to Sep 16: +47 net starsscalar/scalar, week to Sep 23: +52 net starsOpenAPITools/openapi-generator, week to Sep 23: +26 net starsRedocly/redoc, week to Sep 23: +19 net starsswagger-api/swagger-ui, week to Sep 23: +10 net starsoapi-codegen/oapi-codegen, week to Sep 23: +19 net starsAll other repositories, week to Sep 23: +63 net starsscalar/scalar, week to Sep 30: +46 net starsOpenAPITools/openapi-generator, week to Sep 30: +22 net starsRedocly/redoc, week to Sep 30: +16 net starsswagger-api/swagger-ui, week to Sep 30: +13 net starsoapi-codegen/oapi-codegen, week to Sep 30: +13 net starsAll other repositories, week to Sep 30: +68 net starsscalar/scalar, week to Oct 7: +36 net starsOpenAPITools/openapi-generator, week to Oct 7: +14 net starsRedocly/redoc, week to Oct 7: +18 net starsswagger-api/swagger-ui, week to Oct 7: +9 net starsoapi-codegen/oapi-codegen, week to Oct 7: +12 net starsAll other repositories, week to Oct 7: +48 net starsscalar/scalar, week to Oct 14: +29 net starsOpenAPITools/openapi-generator, week to Oct 14: +29 net starsRedocly/redoc, week to Oct 14: +19 net starsswagger-api/swagger-ui, week to Oct 14: +17 net starsoapi-codegen/oapi-codegen, week to Oct 14: +11 net starsAll other repositories, week to Oct 14: +83 net starsscalar/scalar, week to Oct 21: +51 net starsOpenAPITools/openapi-generator, week to Oct 21: +25 net starsRedocly/redoc, week to Oct 21: +24 net starsswagger-api/swagger-ui, week to Oct 21: +12 net starsoapi-codegen/oapi-codegen, week to Oct 21: +14 net starsAll other repositories, week to Oct 21: +78 net starsscalar/scalar, week to Oct 28: +33 net starsOpenAPITools/openapi-generator, week to Oct 28: +22 net starsRedocly/redoc, week to Oct 28: +16 net starsswagger-api/swagger-ui, week to Oct 28: +19 net starsoapi-codegen/oapi-codegen, week to Oct 28: +7 net starsAll other repositories, week to Oct 28: +31 net starsscalar/scalar, week to Nov 4: +36 net starsOpenAPITools/openapi-generator, week to Nov 4: +5 net starsRedocly/redoc, week to Nov 4: +12 net starsswagger-api/swagger-ui, week to Nov 4: +14 net starsoapi-codegen/oapi-codegen, week to Nov 4: +7 net starsAll other repositories, week to Nov 4: +40 net stars

Compare growth

18 of 44 repositories: Created more than 2 years ago, with a push in the last 7 days and a GitHub release in the last 30 days. Select a column name to change the order.

#RepositoryStarsGained, 7 daysPace
1swagger-api/swagger-ui

Swagger UI is a collection of HTML, JavaScript, and CSS assets that dynamically generate beautiful documentation from a Swagger-compliant API.

29K+14–
2OpenAPITools/openapi-generator

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

27K+50.2×
3Redocly/redoc

📘 OpenAPI/Swagger-generated API Reference Documentation

26K+12–
4swagger-api/swagger-codegen

swagger-codegen contains a template-driven engine to generate documentation, API clients and server stubs in different languages by parsing your OpenAPI / Swagger definition.

18K+2–
5scalar/scalar

Scalar is an open-source API platform:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　🌐 Modern REST API Client　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　📖 Beautiful API References　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　✨ 1st-Class OpenAPI/Swagger Support

16K+361.1×
6go-swagger/go-swagger

Swagger 2.0 implementation for go

10K+1–
7swagger-api/swagger-editor

Swagger Editor

9.5K+3–
8oapi-codegen/oapi-codegen

Generate Go client and server boilerplate from OpenAPI 3 specifications

8.6K+7–
9domaindrivendev/Swashbuckle.AspNetCore

Swagger tools for documenting API's built on ASP.NET Core

5.5K+2–
10zircote/swagger-php

A php swagger annotation and parsing library

5.3K0–
11springdoc/springdoc-openapi

Library for OpenAPI 3 with spring-boot

3.7K+6–
12Redocly/redocly-cli

⚒️ Redocly CLI makes OpenAPI easy. Lint/validate to any standard, generate beautiful docs, and more.

1.5K+3–
13oasdiff/oasdiff

OpenAPI Diff and Breaking Changes

1.5K+10–
14sourcey/sourcey

Precision documentation from OpenAPI, MCP, Doxygen, and Markdown guides. Static HTML you own.

1.4K0–
15daveshanley/vacuum

vacuum is the worlds fastest and most versatile OpenAPI, Arazzo, AsyncAPI & JSON Schema linter, docs generator and toolkit. It tears through API specs at light speed. 100% compatible with Spectral rulesets, and OpenAPI 3.0, 3.1 and 3.2

1.1K+1–
16pb33f/libopenapi

libopenapi is a fully featured, high performance OpenAPI 3.2, 3.1, 3.0, Overlays and Arazzo parser, library, validator and toolkit for go applications.

883+1–
17zuplo/zudoku

Framework for building high quality, interactive API documentation.

619+7–
18micro-elements/MicroElements.Swashbuckle.FluentValidation

Use FluentValidation rules instead of ComponentModel attributes

3980–

Faster than the 30 days before

Net stars of the last 30 days are 2 or more times those of the 30 days before.

No repository with this Tag meets this rule now.

Slower than the 30 days before

Net stars of the last 30 days are 50% or less of those of the 30 days before.

No repository with this Tag meets this rule now.

New in the last 90 days

Created on GitHub in the last 90 days.

No repository with this Tag meets this rule now.

Older than 2 years, still releasing

Created more than 2 years ago, with a push in the last 7 days and a GitHub release in the last 30 days.

  1. swagger-api/swagger-ui29K · release 5 days ago
  2. OpenAPITools/openapi-generator27K · release 2 days ago
  3. Redocly/redoc26K · release 21 days ago
  4. swagger-api/swagger-codegen18K · release 2 days ago
  5. scalar/scalar16K · release 5 days ago
All 18 in the table

Last release more than 180 days ago

The newest GitHub release is more than 180 days old. A repository that never published a release is not in this list.

  1. RicoSuter/NSwag7.4K · release 6 months ago
  2. Azure/autorest4.8K · release 10 months ago
  3. spec-first/connexion4.6K · release last year
  4. domaindrivendev/Swashbuckle.WebApi3.1K · release 10 years ago
  5. stoplightio/elements2.5K · release 5 years ago
All 15 in the table

Top GitHub topics with this Tag

Primary languages

How a repository gets this Tag

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How the numbers are counted

All numbers come from the Star History of the repositories that have the Tag now. A period is a run of complete UTC days. All numbers on this page count only the repositories that AwesomeRepos shows in lists. A machine computes them each hour.

For each repository, a period counts only when Star History has each of its days, or when the repository was created in the period. Otherwise the table shows "–". The bars of a week with no complete data are grey.

The Pace is the net stars of a period divided by the net stars of the period before. It shows only when Star History covers each day of the period before, with at least 3 net stars a day on average.

The chart at the top adds up the net stars of all the repositories with the Tag. A rising Admission comes into the Repository Index because it gained stars quickly. Its Star History before its Admission comes from the Repository Host. Thus the days before many rising Admissions are higher than they were for the repositories in the index at that time.

The releases are the GitHub releases of each repository. The lists and the table do not rank repositories, and they do not say that one repository can replace another.