Blog
Articles about Apache Parquet, data engineering, and SQL tools.
Parquet vs CSV: When to Use Each Format
A detailed comparison of Parquet and CSV covering file size, query speed, data types, tooling, and real-world use cases. Learn when each format is the right choice.
What is Apache Parquet? A Beginner's Guide
Learn what Apache Parquet is, how its columnar format works, and why it has become the standard for modern data engineering. A clear, practical introduction for beginners.
Understanding Parquet File Structure: Row Groups, Columns, and Metadata
A deep dive into the internal structure of Apache Parquet files — row groups, column chunks, pages, encodings, compression, and the metadata footer. Understand why Parquet is so fast.
Top Parquet Viewer Tools in 2026
A comprehensive comparison of the best tools for viewing and querying Parquet files in 2026, including browser-based viewers, CLI tools, Python libraries, and IDE extensions.
Convert CSV to Parquet Online — Free Tool
Convert CSV files to Parquet format for free, directly in your browser. No uploads, no server — your data stays private. Learn why converting to Parquet saves space and speeds up queries.
How to Query Parquet Files with SQL (No Python Needed)
Learn how to run SQL queries on Parquet files using Parquet Explorer and DuckDB — no Python, no setup, no data uploads. Includes practical query examples.