CSV to SQL Converter
Convert CSV and Excel spreadsheets into SQL CREATE TABLE schemas and batch INSERT INTO queries instantly.
What is the CSV to SQL Converter?
The NexTools Online CSV to SQL Converter is a free database utility that turns comma-separated (CSV) or tab-separated (TSV) spreadsheet records into executable SQL `CREATE TABLE` and batch `INSERT INTO` queries. Migrating legacy datasets, Excel spreadsheets, or Google Sheets dumps into relational databases like MySQL, PostgreSQL, SQLite, or Microsoft SQL Server typically requires writing fragile custom import scripts.
This tool automates schema generation by inspecting column headers, inferring optimal column data types (integers, decimals, booleans, timestamps, or varchars), and packaging rows into multi-row batch inserts with automatic single-quote string escaping.
Key Capabilities & Features
Automatic Type Inference
Detects whether columns contain integers, floating-point numbers, ISO dates, booleans, or strings to build optimal DDL schemas.
Multi-Engine Dialect Support
Adapts column types and quotes for MySQL backticks (``` `table` ```), PostgreSQL double-quotes, SQLite, and SQL Server brackets.
High-Performance Batch Inserts
Groups records into multi-value batch INSERT statements to drastically accelerate database transaction import speeds.
100% Client-Side Privacy
Your proprietary customer records, financial figures, and product catalogs never touch an external server.
How to Convert CSV to SQL
Paste CSV or Excel Table
Copy table rows directly from Excel or Google Sheets and paste them into the input box, or click "Load Sample CSV".
Configure Target Database
Specify your database table name and select your target dialect (MySQL, PostgreSQL, SQLite, or SQL Server).
Copy or Download SQL
Copy the queries to run in phpMyAdmin, pgAdmin, DBeaver, or click "Download .sql" to export the migration file.
Frequently Asked Questions (FAQ)
How does the converter handle quotes and NULL values?
Empty cells are converted into SQL `NULL` values. Single quotes within text cells are automatically escaped to `\'` or `''` according to the selected SQL dialect to prevent syntax errors.
Can I import Tab-Separated Values (TSV) from Excel?
Yes. The parser auto-detects whether the input is delimited by commas (CSV) or tabs (TSV), allowing seamless copy-pasting straight from spreadsheet cells.
Is there any data upload limit?
Because parsing runs entirely in your local browser JavaScript engine, you can convert thousands of rows without server timeouts or file size limits.