Editor.js
Editor.js is a free, open-source, block-style content editor that produces clean, structured JSON output instead of traditional HTML markup. Built by the passionate developers at CodeX, it represents a modern approach to content editing that prioritizes developer experience and cross-platform compatibility.
What Makes It Different
Unlike classic WYSIWYG editors that produce raw HTML with mixed content and appearance data, Editor.js outputs a clean JSON object containing structured data for each content block. This approach enables developers to:
- Render content natively across Web, iOS, Android, Chat bots, RSS, AMP/IA, and speech readers
- Easily sanitize, validate, and process content on the backend
- Maintain complete control over how content is displayed
Block-Style Architecture
Editor.js workspace consists of separate, independent blocks — paragraphs, headings, images, lists, quotes, and more. Each block is a self-contained contenteditable element provided by plugins and unified by the Editor's Core. This architecture provides:
- More stable editing experience compared to traditional WYSIWYG editors
- Smooth, familiar arrow navigation behavior
- Extensibility through a simple, powerful plugin API
Plugin Ecosystem
Every block is powered by plugins, making it easy to create custom blocks for tweets, Instagram posts, surveys, polls, CTA buttons, and even games. The ecosystem includes dozens of ready-made options for blocks, inline formatting, and block tunes.
Open Source & Community-Driven
Editor.js is maintained by a thriving global community of developers building tools, integrations, and innovative features. It's free to use and welcomes contributions from developers worldwide.
Target Audience
Web developers, product teams, content platform builders, and developers building cross-platform content editing experiences.
Key Features
- Block-style editing with independent content blocks
- Clean JSON output instead of raw HTML markup
- Simple, powerful plugin API for custom blocks
- Cross-platform compatibility (Web, iOS, Android, Chat bots, RSS, AMP)
- Modern, customizable UI/UX out of the box
- Inline formatting and block tunes support
- Easy content sanitization and validation
- Free and open-source with active community
Use Cases
- Web content management systems and blogs
- Mobile app content editing (iOS/Android)
- Chat bot content creation
- RSS feed generation
- Facebook Instant Articles and Google AMP content
- Speech reader compatible content
- Backend content processing and validation
- Multi-platform content distribution
Pros
- Completely free and open-source
- Clean, structured JSON output enables cross-platform use
- Highly extensible through plugin architecture
- Active community and growing ecosystem
- Simple API makes custom block development accessible
- Better stability than traditional WYSIWYG editors
- Easy to sanitize and validate content on backend
Cons
- Requires developer knowledge to implement and customize
- May need custom plugin development for specialized use cases
- Learning curve for developers unfamiliar with block-style editors
Pricing
Free and open-source. Optional sponsorship available through OpenCollective ($2/mo for backers, $10/mo for supporters, or one-time donations).
