Best API documentation writing platforms with WYSIWYG editors in March 2026

WYSIWYG API documentation editors enable non-technical team members to update documentation through familiar visual interfaces without needing to learn Git or markdown syntax, while still supporting docs-as-code workflows through automatic pull request generation. These tools are evaluated based on factors such as visual editing quality, OpenAPI integration, and team collaboration features. Fern stands out for its full-site preview editing, seamless GitHub integration, and SDK generation capabilities, offering a comprehensive solution that maintains version control and supports advanced API workflows. Other tools like Mintlify and ReadMe provide strong visual editing but lack SDK generation, while Stoplight focuses on API design, and GitBook offers a CMS-style experience with optional Git integration. The choice of tool depends on whether visual accessibility or docs-as-code depth is prioritized, with Fern providing both through its integrated approach.