Blok

What it does

Audience

Blok is presented as a developer tool for adding a customizable block editor to modern applications.checked 9 Oct 2026

Blocks

The homepage lists built-in tables, lists, columns, callouts, code, media, embeds, and toggles, and says custom blocks can be added.checked 9 Oct 2026

Built-in blocks

The homepage lists built-in block types including tables, lists, columns, callouts, code, media, embeds, and toggles.checked 9 Oct 2026

Custom blocks

Developers can create custom block tools that render, edit, and save their own data.checked 9 Oct 2026

Data format

Blok saves editor content as structured JSON blocks that can be stored and loaded back.checked 9 Oct 2026

Deployment

The documentation describes client-side embeds that match URLs against a built-in registry and resolve them into provider-sanctioned iframe URLs.checked 9 Oct 2026

Document storage

The server service does not store documents; saving and loading documents remains the app developer’s responsibility.checked 9 Oct 2026

Frameworks

Blok provides a framework-agnostic JavaScript and TypeScript core, React and Vue adapters, an Angular component, and a no-build CDN script.checked 9 Oct 2026

Framework support

The homepage offers a framework-agnostic JavaScript/TypeScript core, React and Vue adapters, an Angular component, and a CDN script.checked 9 Oct 2026

Integrations

The embed block supports provider URLs from YouTube, Vimeo, Figma, CodePen, and more than 100 services.checked 9 Oct 2026

Internationalization

Blok supports 69 locales, with English bundled and the other 68 locales loaded on demand.checked 9 Oct 2026

License

The homepage states Blok is licensed under Apache 2.0.checked 9 Oct 2026

Limit

The tutorial says Blok registers no block tools by default, so users must register the block types they need, including the paragraph block.checked 9 Oct 2026

Link preview limit

Link previews work for roughly 70% of pasted sites, and unsupported previews fall back to a plain link showing the domain.checked 9 Oct 2026

Localization

The homepage states that Blok supports 69 locales and is RTL-ready.checked 9 Oct 2026

Product

Blok is an extensible, block-based rich text editor for adding Notion-like editing to an app.checked 9 Oct 2026

S3 support status

The maker says S3-compatible uploads have not been tested against a real bucket and recommends trying them on a throwaway bucket before relying on them.checked 9 Oct 2026

Saved format

The editor saves content as typed JSON blocks that can be stored and loaded back by the host application.checked 9 Oct 2026

Security

The documentation describes an HTML sanitizer intended to prevent cross-site scripting attacks.checked 9 Oct 2026

Security guidance

The server documentation recommends serving uploaded files from a different hostname than the app and says internet-facing deployments should terminate TLS before traffic reaches the service.checked 9 Oct 2026

Support

The homepage invites teams to contact the maker through Telegram or email for setup and customization help.checked 9 Oct 2026

Undo and redo

The homepage lists conflict-free undo and redo as a feature.checked 9 Oct 2026

Uploads and previews

Uploads and link previews can use existing storage, routes in an ASP.NET Core app, a self-run backend service, or a separately hosted service.checked 9 Oct 2026