Editor.js

Editor.js is a free editor for developers building structured-content workflows into their own applications. It is strongest when content needs to be handled as JSON and tailored with custom block tools; teams that need built-in real-time collaboration should look elsewhere.

Overview

Instead of storing a document as one undifferentiated text field, Editor.js organizes paragraphs, headings, images, lists, and quotes into separate blocks and returns the result as JSON. That structure is useful when an application needs to validate or process content on a backend, or render it for web and mobile clients, Facebook Instant Articles, Google AMP, or audio. Its self-hosted deployment and JavaScript and TypeScript support make it a developer-facing component, not a turnkey hosted publishing service.

CodeX, a non-profit team, makes Editor.js, released under the Apache 2 License. Being free and open source avoids a software fee, but the project team remains responsible for deployment and for fitting the editor to its own content workflow.

Key features

Blocks and extensibility

The getting-started guide gives examples such as headers, link embeds, images, checklists, lists, embeds, and quotes. Plugins power blocks, and developers can create their own through the API. This is valuable when the content model needs application-specific tools; it also means teams must select and maintain the tools they need rather than rely on a fixed, all-in-one setup.

Structured output and read-only mode

JSON output can be validated and processed on the backend, and the site describes it as easy to sanitize. That makes Editor.js a sensible fit for applications that need to treat content as structured data rather than simply save a formatted text field. Read-only mode is supported, but every block tool in use must support it too, so a mixed set of tools can limit how consistently content is presented without editing.

Installation and localization

Projects can install Editor.js through npm or Yarn, load it from a CDN, or use a local project file. Configuration supports localization of editor interface text, tool names, tools, and block tunes. Those options help teams integrate it into different build and language setups, though they still require developer configuration.

Media and table editing

Editor.js supports table editing and media handling for images, file attachments, and embeds such as YouTube, Twitch, Vimeo, Gfycat, Instagram, and Twitter. The breadth suits applications where content includes more than plain text, while the plugin-based model means teams should account for the block tools their particular workflow requires.

Support and collaboration

The contributing page invites bug reports with reproduction steps and environment details and provides a team email for feedback. Editor.js does not offer real-time collaboration, making it a poor fit when multiple people need to edit the same content together live.

Pricing

Editor.js has one free and open-source plan at no cost. There is no free trial because there is no paid plan to trial. This is a strong fit for developers who can self-host and maintain their implementation without a software subscription; it does not remove the work of deployment, configuration, or plugin upkeep.

Platforms

Editor.js is available for web, Android, and iOS, with self-hosted deployment. It supports JavaScript and TypeScript. Self-hosting gives application teams control over deployment, but teams seeking a hosted service should consider a different option.

Who it's for

Editor.js suits developers building web or mobile applications that need block-level content, JSON processing, backend validation, or custom tools. It is less suitable for users looking for a ready-to-use hosted editor, or teams that require real-time collaboration as part of the editing workflow.

Pros and cons

• Structured JSON output: Content can be validated and processed on the backend, supporting applications that treat documents as data.
• Extensible block model: Plugins and an API let developers add tools suited to a specific content model.
• No software fee: The free, open-source license avoids subscription costs, while self-hosting leaves deployment to the team.
• Tool-by-tool read-only support: Each block tool must support read-only mode, which can complicate consistent non-editing views.
• No real-time collaboration: Teams needing live shared editing will need another editor.

Alternatives

For a broader comparison, see Rich Text Editor Software.

• AiEditor is another freemium option with a free plan and Android, iOS, self-hosted, and web platforms.
• CKEditor 5 is worth considering if you want a freemium option with a free trial and multiple platform options, including API and self-hosted. Its Essential plan costs $160 a month, with monthly billing at $160 per month or annual billing at $144 per month; it includes 5,000 editor loads per month, then charges $45 per 1,000.
• BlockNote is another freemium option with a free plan for self-hosted and web use.
• Jodit offers a free MIT-licensed core editor with built-in plugins; its Enterprise plan has custom pricing and includes OEM redistribution and priority support.
• MDXEditor is a free web-based React component for authoring Markdown, with features enabled through plugins.
• Milkdown is another fully free, open-source web editor released under the MIT license.
• Plate has a free plan with all plugins; its Personal plan costs €299, paid once and includes a per-developer license, unlimited solo projects, free updates, and more than 100 premium components.
• ProseMirror is a free, open-source library that permits commercial use and installs with npm.

Verdict

Choose Editor.js if you are building an application that benefits from structured JSON content and need the freedom to assemble or extend its block tools without a software fee. Look elsewhere if you need hosted deployment or real-time collaboration, or if your team does not want to own implementation and tool maintenance.