Posted on Mar 4

📊 From Excel to SQL in Seconds: Meet Your New Favorite Firefox Extension

#webdev #sql #ai #javascript

Tired of manually writing CREATE TABLE statements for every Excel spreadsheet that lands on your desk?

We've all been there. A client sends you product data in Excel, a stakeholder wants it in the database, and you're stuck mapping columns to data types. It's tedious, error-prone, and honestly? It should be automated.

Introducing the Excel to SQL Query Generator – a privacy-first Firefox extension that transforms spreadsheets into clean SQL in seconds.

✨ What Makes This Different?

Unlike online converters that ask you to upload sensitive company data to some server, everything happens locally on your machine. Your customer lists, sales figures, and internal reports never leave your device.

Core Features That Actually Matter:

🧠 Smart Type Detection – Automatically identifies INT, FLOAT, DATE, VARCHAR, and TEXT. No more guessing whether that column should be VARCHAR(255) or TEXT.
🎯 Surgical Precision – Select specific columns AND row ranges (e.g., rows 2-10, skip headers, grab 20-40). Perfect for messy exports.
⚡ Multiple Generation Modes – Need just the schema? Table structure only. Moving data? Full INSERT statements. Both? We've got you.
✨ One-Click Formatting – Clean, properly indented SQL that's actually readable (and runs without syntax errors).
📋 Copy to Clipboard – Paste directly into pgAdmin, MySQL Workbench, DBeaver, or your terminal.

🔧 How It Works (It's Embarrassingly Simple)

Load any .xlsx or .xls file
Name your target table
Customize columns and rows (optional)
Generate → Copy → Run

The extension opens in its own tab, giving you screen space to work with large spreadsheets without fighting a tiny popup.

🎯 Perfect For:

Database administrators migrating legacy Excel data into production
Developers prototyping schemas from sample data
Data analysts creating repeatable import scripts
Students learning SQL by experimenting with real data structures

🛡️ The Privacy Promise

No servers. No uploads. No tracking. Your data stays in your Firefox tab, period. The code runs locally, parses your file locally, and generates SQL locally.