Privacy Focused • Serverless SQLite (WASM)

SQL Query Playground

Execute SQL queries directly in your browser with a powerful WASM engine. Zero latency, 100% private.

Database Control

Public Schema

0
Scrippets:

Query Results

Ready to execute

Run a query to see data here

key Features

  • Full SQLite database engine running in-browser (WASM)
  • Zero latency query execution with instant results
  • Practice complex queries (JOIN, UNION, CTEs, Subqueries)
  • Visual results table with sorting, filtering, and export
  • Import and Export standard .sqlite or .db database files
  • Persistent state: Your work stays in your browser across sessions
  • 100% Private - Data never leaves your device

The Free SQL Query Playground is the ultimate developer sandbox for learning and testing SQL queries. Unlike traditional online compilers that rely on server-side databases, our tool runs a high-performance SQLite engine directly in your browser using next-generation WebAssembly (WASM) technology.

Enterprise-Grade Performance in Browser

Experience zero-latency query execution. because the database engine is running locally on your device, there are no network delays or server timeouts. This makes it the perfect environment for:

  • SQL Interview Preparation: Solve complex algorithmic database problems in a realistic environment.
  • Data Analysis Prototyping: Quickly test query logic on sample datasets before running them on production servers.
  • Academic Learning: Students can master relational database concepts without installing heavy software like MySQL or PostgreSQL.
  • Query Debugging: Isolate complex JOIN or subquery logic to ensure it returns the expected row counts.

Master Advanced SQL Concepts

Don't just stick to the basics. ToolsAid's SQL Playground supports modern SQLite features used in professional software development:

// Calculate running totals with Window Functions

SELECT 
    order_date, 
    amount,
    SUM(amount) OVER (ORDER BY order_date) as running_total
FROM sales;

Privacy First Intelligence

In an age of data breaches, we prioritize your security. Your data never leaves your device. Any database you import or data you generate stays strictly within your browser's memory. This allows you to work with sensitive data snippets without worrying about server-side logs or snapshots.

Frequently Asked Questions

Is this SQL Playground really free?

Yes, completely free with no registration, time limits, or hidden costs. It is designed as a public utility for the developer community.

Is my data private and secure?

Absolutely. The SQLite database runs entirely within your browser using WebAssembly (WASM). Your data is stored in your browser's persistent storage and is never uploaded to any server.

Which SQL dialect is supported?

This tool uses the actual SQLite engine. It supports the full SQLite SQL syntax, which is highly compatible with PostgreSQL and MySQL standards.

Can I practice for SQL interviews here?

Yes! This is an ideal environment for interview prep. You can practice everything from basic SELECT statements to advanced concepts like **Common Table Expressions (CTEs)** and **Window Functions**.

How do I import my own data?

You can use the 'Import Database' button to load any existing `.sqlite` or `.db` file. Alternatively, you can run standard `CREATE TABLE` and `INSERT INTO` scripts directly in the editor.

Does it support export to CSV or JSON?

Yes. Once you run a query, you can export the results directly from the data grid into standard formats like CSV for further analysis in Excel or other tools.

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