RichTextBox.AspNetCore 1.0.0-preview.19

RichTextBox for ASP.NET Core

RichTextBox.AspNetCore is the official ASP.NET Core wrapper around the RichTextEditor 2.0 runtime — Tag Helper, server endpoints, AI provider adapters, upload pluggability, and DOCX export — shipped as a single package under a perpetual one-time license.

Drop the <richtextbox> tag into any Razor page and you get a Word-class editor with AI Toolkit, slash commands, @mentions, Track Changes, threaded comments, revision history, Yjs presence, dictation, and mobile-first layout. Every collaboration / review feature ships in the base license — no premium tier, no usage credits.

30-second setup

// Program.cs
builder.Services.AddRichTextBox();
builder.Services.AddRichTextBoxOpenAiResolver(opts =>
{
    opts.ApiKey = builder.Configuration["OpenAI:ApiKey"];
    opts.Model  = "gpt-4o-mini";
});

var app = builder.Build();
app.MapRichTextBoxUploads();   // also maps DOCX export + AI streaming endpoints

@* MyPage.cshtml *@
@addTagHelper *, RichTextBox

<form method="post">
    <richtextbox asp-for="Body"
                 toolbar="full"
                 height="540px"
                 enable-ai-toolkit="true"
                 enable-slash-commands="true"
                 enable-tracked-changes="true"
                 enable-comments="true"
                 enable-revision-history="true" />
</form>

That's the full integration. Drop RichTextBox.lic next to Program.cs, post the form as normal, and the model receives clean HTML.

What's in the box

Editor & toolbar

• Drop-in <richtextbox> Tag Helper (Razor Pages and MVC)
• Static web assets bundled — no separate CDN required
• Toolbar presets (default, basic, full, mobile, office) plus custom toolbar strings — see the Toolbar Items Reference for every available item ID
• Skins, resize modes, context menus, fullscreen, autosave
• Mobile toolbar mode (44×44 tap targets, sticky header, bottom-sheet dropdowns) via enable-mobile-toolbar="true"

AI Toolkit

• Ask AI dropdown, AI Chat docked panel, AI Review drawer
• Built-in provider resolvers for OpenAI, Anthropic, Azure OpenAI (one-line DI)
• Streaming responses (Server-Sent Events) — tokens render as they arrive
• BYOK pattern + IRichTextBoxAiResolver for any custom backend

builder.Services.AddRichTextBoxOpenAiResolver(opts => { ... });       // OpenAI / Groq / Ollama / Together
builder.Services.AddRichTextBoxAnthropicResolver(opts => { ... });    // Claude
builder.Services.AddRichTextBoxAzureOpenAiResolver(opts => { ... });  // Azure OpenAI

Collaboration & review

• Slash commands — type / to insert blocks
• @Mentions — @, #, custom triggers; async data sources
• Track Changes — Word-style human suggesting mode
• Threaded comments — anchored to selection ranges
• Revision history — snapshots, diff API, named versions
• Yjs presence + opt-in concurrent typing (textSync: true)

All toggleable via enable-* Tag Helper attributes; all share a single editor.reviewLedger store.

Export & dictation

• DOCX export — server-side via MIT-licensed DocumentFormat.OpenXml at POST /richtextbox/export/docx
• PDF export — client-side via the html2pdf toolbar item
• Markdown — round-trip via enable-structured-content="true"
• Dictation — Web Speech API, microphone toolbar button, opt-in via enable-dictation

Pluggable cloud uploads

• IRichTextBoxUploadStore interface — default writes to disk; swap for S3 / Azure Blob / Cloudinary / GCS with one DI registration
• See the cloud upload providers reference for copy-paste sample stores

Operations

• RichTextBox.lic validation
• Configurable file-extension allow-lists, size limits, upload roots
• Folder-aware image gallery endpoint
• Built-in AI suggestion ledger + review-log persistence (file or custom store)

Tag Helper attribute reference (highlights)

Full list of attributes and item IDs at richtextbox.com/ToolbarItems.

Endpoints mapped by MapRichTextBoxUploads()

Pricing model

Perpetual one-time license. No subscription, no per-load metering, no AI usage-credit invoices. The full v2.0 stack — including Track Changes, Comments, Revision History, AI Toolkit, DOCX export, dictation, and Yjs presence — ships in the base license.

See richtextbox.com/Pricing for current pricing tiers.

Migrating from TinyMCE or CKEditor 5

Most teams finish in under a day. Existing HTML keeps working; toolbar config maps mostly 1→1; the features you're paying premium for ship in our base license.

Step-by-step config cheat sheets: richtextbox.com/Migrate

Versioning & release notes

Every preview release is documented at richtextbox.com/ReleaseNotes. Recent highlights:

• preview.13 — Pluggable cloud upload providers (IRichTextBoxUploadStore)
• preview.12 — Dictation, mobile toolbar mode, improved Paste from Word
• preview.11 — DOCX export, named revisions + diff API
• preview.10 — Streaming AI (SSE), Yjs concurrent typing preview, public Accessibility statement
• preview.9 — First-party AI provider resolvers (OpenAI / Anthropic / Azure)
• preview.8 — v2.0 collaboration & review plugins (Slash, Mentions, Track Changes, Comments, Revision History, Yjs)

Documentation

• Live demos — richtextbox.com/Demos
• End-User Guide (for document authors) — richtextbox.com/UserGuide
• Toolbar items reference — richtextbox.com/ToolbarItems
• Cloud upload providers — richtextbox.com/UploadProviders
• Accessibility statement (WCAG 2.2 AA) — richtextbox.com/Accessibility
• Comparison vs TinyMCE / CKEditor / Froala / TipTap — richtextbox.com/Compare

Support

• Email support@richtextbox.com — first response within one business day
• Trial license requests — sales@richtextbox.com
• Accessibility issues — accessibility@richtextbox.com

© Richscripts Inc. — all rights reserved. Licensed under the RichTextBox.AspNetCore EULA.