File SQL - Query CSV, JSON, Parquet Files
Query your files with SQL - right inside VS Code, no setup required.
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What is File Sql?
File SQL is a VS Code extension that lets you query CSV, JSON, Parquet, and S3 files directly using SQL, powered by DuckDB. Simply right-click a file in Explorer to instantly create a queryable table with no setup, schemas, or configuration needed. It runs 100% locally on your machine with no accounts, cloud dependencies, or telemetry, making it ideal for developers and data analysts who need quick insights from messy file formats.
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Key Features of File Sql
- Query CSV, JSON, Parquet, TSV, JSONL/NDJSON, and S3 files
- Auto-detected delimiters, headers, and data types
- Folder-as-table mapping for multi-file datasets
- S3-native support with auto-detected regions and AWS profile support
- Local-only execution - no cloud, no accounts, no telemetry
- DuckDB-powered performance for millions of rows
- Works on Windows, macOS, and Linux
Who Should Use File Sql?
Quickly analyze CSV reports sent by teammates
Query large Parquet files without loading into memory
Explore nested JSON data structures
Access S3 bucket data without downloading locally
Aggregate data across multiple files in a folder
Export query results for further analysis
File Sql: Pros & Cons
✓Pros
- Zero setup - right-click and query
- 100% local - data never leaves your machine
- No account or login required
- Supports multiple file formats in one extension
- Auto-detects delimiters, headers, and S3 regions
- Fast performance on large files (millions of rows)
- Open source (MIT license)
Frequently Asked Questions about File Sql
What file formats does File SQL support?
File SQL supports CSV, JSON, Parquet, TSV, JSONL/NDJSON, and S3 files. Delimiters, headers, and data types are auto-detected.
Do I need to create an account or set up authentication?
No. File SQL requires no account, no login, and no telemetry. For S3 access, it uses your existing AWS profile credentials.
Does my data go to the cloud?
No. File SQL runs 100% locally on your machine. Your data never leaves your computer - it only interacts with DuckDB and your local files.
How do I install File SQL?
You can install it in one click from the VS Code Marketplace, or run the command: code --install-extension arunkumar1997.file-sql
Can I query multiple files at once?
Yes. Point at a folder or S3 prefix, and each subfolder becomes its own table automatically with no schemas or configuration needed.
Tool Details
- Pricing
- Free
- Category
- Database Tools
- Added
- Jul 2026
- Last Updated
- Jul 2026
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