CodeSpark Embeds

EducationIntermediateJan 14, 2026

CodeSpark Embeds

Embed interactive, executable code sandboxes directly into your educational content.

The Problem

Online course creators, bootcamp instructors, and technical bloggers face a significant hurdle in providing engaging, hands-on coding experiences. They often resort to static code blocks, which lack interactivity, or complex external IDEs that burden students with local environment setup. This leads to student frustration, wasted hours debugging local configurations instead of learning core concepts, and ultimately, lower course completion rates. Instructors spend valuable time troubleshooting setup issues, fragmenting the learning experience and reducing overall engagement. The market lacks a simple, embeddable solution specifically designed for educators to quickly deploy interactive coding exercises without requiring students to leave the learning platform or install anything.

The Solution

CodeSpark Embeds provides a streamlined platform for educators to create and embed interactive, executable code snippets into any webpage or learning management system. Users can define code (HTML, CSS, JavaScript, Python via Pyodide), add descriptions, and customize the editor's appearance. The core feature is a lightweight, browser-based code editor (Monaco Editor) with a 'Run' button that executes the code within the student's browser, displaying output instantly. This eliminates environment setup headaches for students and allows for immediate, hands-on experimentation. Educators simply create a snippet, copy an iframe embed code, and paste it into their content. The solution is unique in its dedicated focus on ease of embedding for educational contexts, contrasting with general-purpose code playgrounds or full-blown cloud IDEs.

Tech Stack

Frontend
Next.js 14ReactTailwind CSSMonaco Editor
Backend
Next.js API Routes
Database
PostgreSQL (Supabase)
APIs
StripeResendPyodide (client-side execution for Python)

System Architecture

Database Schema

CREATE TABLE IF NOT EXISTS snippets (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  user_id UUID REFERENCES auth.users(id) ON DELETE CASCADE NOT NULL,
  title VARCHAR(120) NOT NULL,
  description TEXT,
  code TEXT NOT NULL,
  language VARCHAR(50) NOT NULL, -- e.g., 'javascript', 'html', 'python'
  embed_id VARCHAR(36) UNIQUE NOT NULL DEFAULT gen_random_uuid(), -- Publicly shareable ID
  created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
  updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX idx_snippets_user_id ON snippets(user_id);
CREATE INDEX idx_snippets_embed_id ON snippets(embed_id);

COMMENT ON TABLE snippets IS 'Stores user-created interactive code snippets.';
COMMENT ON COLUMN snippets.user_id IS 'Foreign key to the auth.users table.';
COMMENT ON COLUMN snippets.embed_id IS 'Unique ID for public embedding, separate from primary key.';

CREATE TABLE IF NOT EXISTS subscriptions (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  user_id UUID REFERENCES auth.users(id) ON DELETE CASCADE NOT NULL,
  stripe_customer_id TEXT UNIQUE NOT NULL,
  stripe_subscription_id TEXT UNIQUE NOT NULL,
  status TEXT NOT NULL, -- e.g., 'active', 'canceled', 'past_due'
  current_period_end TIMESTAMP WITH TIME ZONE,
  created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
  updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX idx_subscriptions_user_id ON subscriptions(user_id);
CREATE INDEX idx_subscriptions_stripe_customer_id ON subscriptions(stripe_customer_id);

COMMENT ON TABLE subscriptions IS 'Manages user subscription status via Stripe.';
COMMENT ON COLUMN subscriptions.user_id IS 'Foreign key to the auth.users table.';

API Endpoints

POST/api/snippetsCreates a new code snippet for the authenticated user.
GET/api/snippetsRetrieves all code snippets belonging to the authenticated user.
GET/api/snippets/[id]Retrieves a specific code snippet by its ID for the authenticated user.
PUT/api/snippets/[id]Updates an existing code snippet by its ID for the authenticated user.
DELETE/api/snippets/[id]Deletes a code snippet by its ID for the authenticated user.
GET/api/embed/[embed_id]Retrieves a code snippet by its public embed_id for rendering in an iframe. No authentication required.
POST/api/stripe/checkout-sessionCreates a new Stripe checkout session for initiating a subscription.
POST/api/stripe/webhookHandles incoming Stripe webhook events to update subscription statuses.
POST/api/user/portalGenerates a link to the Stripe customer portal for managing subscriptions.
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