SQLite Studio
Free Online SQL Compiler & Interactive ER Diagram Visualizer
SQLite Studio is an in-browser database development IDE developed by ProDevOpz. Combining a full SQLite 3 WebAssembly engine with an automatic Entity-Relationship (ER) diagram visualizer, it lets developers, students, and database architects write SQL queries, inspect table relations, and debug schemas with 0ms server latency and 100% client-side privacy.
Engineered for Fast, Visual Database Development
In-Browser WebAssembly Engine
Powered by official SQLite3 compiled to WebAssembly (WASM). Queries run in microsecond speeds directly in your browser without waiting for remote server round-trips.
Interactive ER Diagram Visualizer
Automatically maps table relationships, composite keys, primary keys, and foreign keys into a clean, interactive entity-relationship canvas as you write DDL.
Gutter Run & Multi-Query Execution
Execute discrete SQL statements line-by-line directly via editor gutter buttons, or run complete multi-statement migration scripts in one unified batch.
Sortable Data Grid & Export
Inspect query results in a high-performance virtualized data table. Sort columns dynamically and export result sets into CSV or JSON with a single click.
100% Client-Side Privacy
Your data stays on your machine. All database files and query executions occur in client-side RAM, ensuring absolute privacy for sensitive schemas and testing data.
Pre-Loaded SQL Starter Schemas
Jumpstart practice with ready-to-use database templates for E-Commerce, University Management, HRMS, and Social Networks—complete with realistic relational seeds.
Automatic ER Diagram & Relationship Visualizer
Turn raw SQL DDL into clear, interactive entity-relationship diagrams. No manual node drawing or drag-and-drop schema tools required.
Detects `FOREIGN KEY (...) REFERENCES ...` clauses and connects tables with directional relationship lines automatically.
Pan, zoom, and organize large schema tables across the canvas to visually communicate database architecture to teams.
Clearly labels Primary Keys (PK), Foreign Keys (FK), NULL/NOT NULL rules, and exact data types for each attribute.
SQLite Studio vs. Traditional Online Compilers
| Feature | SQLite Studio (ProDevOpz) | Generic Online SQL Compilers |
|---|---|---|
| Query Execution Latency | Instant (~0.4ms) — In-browser WASM | 800ms - 3,500ms — Remote cloud queue |
| Database ER Visualizer | Built-in, interactive & auto-generated | Not available or requires paid plugin |
| Data Privacy & Security | 100% Local sandbox; zero server storage | Code & data sent to external cloud servers |
| Gutter Line-by-Line Run | Supported on any individual statement | Runs whole script only or manual selection |
| Data Export Options | 1-Click CSV and JSON downloads | Plain text output or copy-paste only |
| Cost & Account Requirement | 100% Free, no sign-up or paywall | Freemium limits or mandatory registration |
Full-Featured Relational Database Capabilities
Frequently Asked Questions
What is SQLite Studio / Online SQL Compiler?
SQLite Studio (hosted at sqlcompiler.jobsio.in) is a modern developer tool engineered by ProDevOpz. It provides a browser-native SQLite workspace that combines a code editor, an interactive entity-relationship schema visualizer, and a high-performance query runner with zero server latency.
How does the ER diagram relationship visualizer work?
When you execute SQL DDL statements (like CREATE TABLE orders (id INT, user_id INT REFERENCES users(id))), the visualizer inspects SQLite's system catalog (sqlite_master and PRAGMA foreign_key_list) and constructs a visual diagram connecting related tables with relational link lines.
Are my databases and queries saved on a server?
No. The entire engine runs in WebAssembly on your browser's V8 or JavaScriptCore thread. Your SQL queries, tables, and data records never leave your computer, making it suitable for experimenting with private data formats.
What SQL dialects and features are supported?
It supports standard SQL conforming to SQLite 3 specifications, including CTEs (WITH queries), Window Functions, Subqueries, Primary & Foreign Keys, CHECK constraints, UPSERT, and JSON1 functions.
Who is SQLite Studio built for?
It is designed for computer science students learning relational databases, software engineers drafting schemas, database administrators testing complex joins, and instructors teaching database courses.
Ready to Run SQL Queries With 0ms Latency?
Open SQLite Studio directly in your web browser. Write SQL queries, generate live ER diagrams, and analyze relational data without creating an account or paying fees.