Guide
How to Open a Parquet File Locally
Learn how to open a Parquet file locally in your browser without Python, Spark or uploads using DuckDB and Queryfiles.app.
READ_GUIDE_
SEO content cluster
Local Data Analysis Guides
Step-by-step guides and comparisons for opening Parquet, querying CSV, inspecting Excel files and understanding DuckDB in the browser.
This guide cluster helps developers and analysts choose the right local workflow for Parquet, CSV and Excel files. Every page is designed to answer a specific high-intent search and link naturally to related tasks.
Guide
How to Query CSV with SQL in the Browser
Use SQL on CSV files directly in the browser with DuckDB. Filter, aggregate and inspect local CSV data without uploads or setup.
READ_GUIDE_
Guide
How to Inspect Excel Files Without Uploading Them
Inspect Excel and XLSX files locally in your browser without uploads. Review sheets, infer schema and query workbook data with DuckDB.
READ_GUIDE_
Comparison
Parquet vs CSV for Analytics
Compare Parquet vs CSV for analytics. Learn which format is faster, smaller, easier to inspect and better for modern analytical workflows.
READ_GUIDE_
Guide
DuckDB in the Browser for Local File Analysis
Understand how DuckDB in the browser enables fast local file analysis for Parquet, CSV and Excel without servers or installation.
READ_GUIDE_
Analysis
Start with your local file
// QUERYFILES.APP LETS YOU OPEN PARQUET, CSV AND EXCEL FILES DIRECTLY IN THE BROWSER WITH DUCKDB. MOVE FROM GUIDE TO HANDS-ON ANALYSIS.