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Zudoku

Free#8 of 28 in API Documentation ToolsApi Docs

Zudoku: A free, open-source option for versioned, interactive OpenAPI documentation sites. Ranked #8 of 28 in API Documentation Tools by our editors (8.1/10); pricing: Free plan; best for open-source teams needing versioned API sites.

8.1/10Editor score
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Zudoku8.1 Visit Zudoku

At a glance

  • Editor score
    8.1 / 10
  • Pricing
    Free plan
  • Best for
    Open-source teams needing versioned API sites
  • Free plan
    Yes
  • Paid from
    Free
  • OpenAPI import
    Yes
  • Facts checked
    20 Sep 2026
Zudoku screenshot

  • Where it wins

    • Generates references from OpenAPI v2 and v3 JSON or YAML
    • Supports multiple API versions and interactive request testing
    • Adds MDX pages, authentication integrations, themes, and plugins

  • Where it doesn't

    • Requires CLI-based project management and a build step
    • Deployment involves uploading generated static files
    • Customization may require configuration, MDX, or plugin work

Our verdict on Zudoku

Zudoku is an open-source framework for API documentation, developer portals, and internal documentation sites. It is aimed at teams that want to generate API references from OpenAPI JSON or YAML files while adding narrative documentation and a branded site experience. Projects can use local schema files or URL-based sources, support multiple API versions, and run on the web through self-hosted deployment.

The published product details show a free, open-source model rather than a tiered paid plan structure. Zudoku projects are created and managed through a CLI, then built into static HTML, JavaScript, and CSS files for deployment on a server or hosted service. That approach can suit teams that want control over hosting and a straightforward static output, while adding a build step to the documentation workflow. It is less suited to teams looking for a fully managed documentation service with no project or deployment configuration.

Zudoku’s strongest area is combining generated API reference content with tools for a broader developer portal. The interactive API playground supports request testing, while authentication support includes OAuth2, JWT, OpenID, and Auth0 integrations. Teams can publish MDX documentation pages and configure themes, branding, navigation, and plugins around the generated reference. Choose Zudoku when open-source control, versioned APIs, static generation, and extensibility matter. Consider an alternative if your priority is a hosted workflow that avoids CLI management and static-site deployment.

Your product? Our editors can test Zudoku in depth and publish a review, labelled as paid · from $149/mo →

Zudoku pricing

Plans Free planFree Free to use — no paid tier required for the core job.
See plans on zudoku.dev

Zudoku fact sheet

Free planYes
Paid fromFree
OpenAPI importYes
Interactive API referenceYes
Code samplesYes
API versioningYes
Custom domainNot verified
Hosting modelSelf_hosted
DeploymentSelf-hosted
PlatformsWeb
SupportCommunity, Docs
Built forSolo, Small business, Mid-market, Enterprise (editorial estimate)
PricingFree plan
Websitezudoku.dev
Facts checked20 Sep 2026

Alternatives to Zudoku

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Zudoku vs the competition

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Also Ranked In

Zudoku is ranked in 2 of our directories.

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Featured on iTechGuides

Featured on iTechGuides — Zudoku 8.1/10

Zudoku is listed in our API Documentation Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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