ParquetReader Blog
Guides and tutorials for data file conversion, SQL checks, and export workflows.
Convert & Query Data Files Online — Parquet, Avro, ORC, Feather, CSV, JSON, Excel, GeoJSON, NetCDF, Arrow
Convert and query Parquet, Avro, ORC, Feather, CSV, JSON, Excel, GeoJSON, NetCDF, and Arrow files online with SQL, search, and export.
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Parquet to CSV Converter Online — Export CSV Instantly (SQL + Search)
Convert Parquet to CSV online. Upload your file, validate with SQL, and export as CSV, JSON, or Parquet.
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Parquet to JSON Converter Online — Export JSON Instantly (SQL + Search)
Convert Parquet to JSON online. Upload your file, validate with SQL, and export as CSV, JSON, or Parquet.
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Excel to CSV Online — Upload .xlsx, Query with SQL, Export CSV
Convert Excel (.xlsx) to CSV online. Upload your file, validate with SQL, and export as CSV, JSON, or Parquet.
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CSV to Parquet Online — Convert, Validate with SQL, Export Parquet
Convert CSV to Parquet online. Upload your file, validate with SQL, and export as CSV, JSON, or Parquet.
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ORC to CSV Online — Upload ORC, Query with SQL, Export CSV
Convert ORC to CSV online. Upload your file, validate with SQL, and export as CSV, JSON, or Parquet.
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Avro to CSV Online — Upload Avro, Query with SQL, Export CSV
Convert Avro to CSV online. Upload your file, validate with SQL, and export as CSV, JSON, or Parquet.
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Feather to CSV Online — Upload Feather, Explore Fast, Export CSV
Convert Feather to CSV online. Upload your file, validate with SQL, and export as CSV, JSON, or Parquet.
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GeoJSON to CSV Online — Convert GeoJSON, Query with SQL, Export CSV
Convert GeoJSON to CSV online. Upload your file, validate with SQL, and export as CSV, JSON, or Parquet.
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NetCDF to CSV Online — Explore NetCDF with SQL, Export CSV
Convert NetCDF to CSV online. Upload your file, validate with SQL, and export as CSV, JSON, or Parquet.
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Arrow to Parquet Online — Upload Arrow, Validate with SQL, Export Parquet
Convert Arrow to Parquet online. Upload your file, validate with SQL, and export as CSV, JSON, or Parquet.
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JSON to Parquet Online — Convert Nested JSON and Validate with SQL
Convert JSON to Parquet online, validate nested fields with SQL, and export clean Parquet for faster analytics workflows.
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JSON to CSV Online — Flatten JSON for Spreadsheets, BI, and Reporting
Convert JSON to CSV online, flatten nested structures, and run SQL checks before exporting to spreadsheets or BI tools.
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Excel to Parquet Online — Convert .xlsx to Analytics-Ready Parquet
Convert Excel to Parquet online, normalize column types with SQL, and export analytics-ready Parquet in minutes.
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Avro to Parquet Online — Convert Avro Files for Analytics Pipelines
Convert Avro to Parquet online, validate schema quality with SQL, and export Parquet for faster analytics workflows.
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Parquet vs CSV for Analytics — Which Format Should You Use?
Compare Parquet vs CSV for analytics workloads, including performance, storage cost, interoperability, and workflow fit.
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Excel to JSON Online — Convert .xlsx to Clean JSON for APIs
Convert Excel to JSON online, validate columns with SQL, and export API-ready JSON without writing scripts.
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CSV to JSON Online — Convert Tabular Data to Structured JSON
Convert CSV to JSON online, validate row quality with SQL, and export structured JSON for apps and APIs.
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GeoJSON to Parquet Online — Convert Geospatial Features for Analytics
Convert GeoJSON to Parquet online, validate attributes with SQL, and export compact columnar files for geospatial analytics.
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ORC to Parquet Online — Convert ORC Files for Faster Analytics
Convert ORC to Parquet online, validate schema quality with SQL, and export Parquet for lakehouse workloads.
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Avro to JSON Online — Convert Event Data for APIs and Debugging
Convert Avro to JSON online, inspect records with SQL, and export JSON for integrations, QA, and debugging.
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Feather to Parquet Online — Convert DataFrame Files for Production Analytics
Convert Feather to Parquet online, validate columns with SQL, and export Parquet for warehouse and lake workflows.
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NetCDF to Parquet Online — Convert Scientific Grids for Scalable Queries
Convert NetCDF to Parquet online, validate variables with SQL, and export compact Parquet for repeatable scientific analysis.
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Arrow to CSV Online — Convert Arrow Tables to Shareable CSV
Convert Arrow to CSV online, validate table quality with SQL, and export CSV, JSON, or Parquet in one workflow.
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Arrow to JSON Online — Convert Arrow Data for APIs and Apps
Convert Arrow to JSON online, inspect data with SQL, and export integration-ready JSON in minutes.
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Feather to JSON Online — Convert DataFrame Files to JSON Fast
Convert Feather to JSON online, run SQL quality checks, and export JSON, CSV, or Parquet from one tool.
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GeoJSON to JSON Online — Extract Geospatial Properties as JSON
Convert GeoJSON to JSON online, validate feature properties with SQL, and export clean JSON for downstream systems.
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NetCDF to JSON Online — Convert Scientific Variables to JSON
Convert NetCDF to JSON online, validate variable quality with SQL, and export JSON, CSV, or Parquet as needed.
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ORC to JSON Online — Convert ORC Data for API and App Workflows
Convert ORC to JSON online, verify schema quality with SQL, and export JSON, CSV, or Parquet from one workflow.
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Excel Support Is Here — Upload .xlsx, Query with SQL, Export Instantly
Upload .xlsx files, query Excel data with SQL, and export to Parquet, CSV, or JSON in one fast workflow.
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Day Pass vs Pro — A Simple, Honest Way to Pay for ParquetReader
Most people don’t want another account, another onboarding flow, or a subscription they’ll forget to cancel.
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Instant NetCDF Exploration — Introducing Native Support in ParquetReader 🌦️⚡
NetCDF is one of the most widely used formats in meteorology, climate science, environmental monitoring, oceanography, and remote sensing.
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Query Terabytes of Parquet Data Directly from S3 — Introducing ParquetReader On-Prem 🚀
Until now, ParquetReader made it easy to preview and query local Parquet, Avro, ORC, and Feather files — no setup, no database.
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Run SQL Queries on Parquet Files Instantly with ParquetReader 🧑💻⚡
Until now, ParquetReader let you preview, search, and download Parquet, Avro, ORC, and Feather files with ease.
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How to Connect ParquetReader’s API to Power BI 📊🔌
Power BI is one of the most popular business intelligence tools for turning raw data into dashboards and insights.
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AI Agents Meet Parquet Files — The Future of Automated Data Analysis 🧠📊
AI Agents are no longer just futuristic ideas — they’re here and becoming powerful tools in everyday data workflows.
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One-Time Payments & Subscriptions Now Live — Unlock Full Downloads & API Access 🚀
We’ve launched one-time payments and subscriptions for ParquetReader! You can now unlock full downloads for large files and get access to your own API Key...
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How to Open a Parquet File Online (Step-by-Step Guide)
Learn how to open a Parquet file online in minutes. Step-by-step guide to preview schema, filter rows, run SQL, and export to CSV or JSON.
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How to Automate Parquet, Avro, ORC, and Feather Conversions with n8n 🚀
If you're working with Parquet, Avro, ORC, or Feather files, you already know the pain: manual uploads, downloading, renaming, and moving files around just...
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The Future of Data: Why Parquet, ORC, Avro, and Feather Are Unstoppable 🚀
The world is generating more data than ever before. From real-time analytics to AI model training, businesses need efficient ways to store, retrieve, and...
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Introducing DataMaskPro: Effortless Data Masking for Security & Compliance
We are excited to introduce DataMaskPro – a powerful and easy-to-use tool designed to help businesses and developers automatically mask sensitive data....
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ParquetReader Now Supports ORC!
We are excited to announce that ParquetReader now supports ORC files! ORC (Optimized Row Columnar) is a powerful, high-performance format commonly used in...
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Exciting New Frontend Release for ParquetReader!
We’re absolutely thrilled to announce the release of our brand-new interface for ParquetReader! This update is a huge step forward in making your data...
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Avro File Support and Enhanced Conversion Tools!
We’re thrilled to announce another exciting update for ParquetReader: we now support Avro files! In addition to Parquet and Feather, our tool is expanding...
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Big News for ParquetReader Fans: Feather File Support and Enhanced Conversion Tools!
We’re excited to announce a game-changing update for ParquetReader: we now support Feather files! In addition, our team is continuously working to bring you...
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Exciting News for Our ParquetReader Community: A Fresh Look and More Conversion Tools on the Way!
We’re thrilled to share some exciting updates from our team. Not only are we working on a brand-new version of the ParquetReader user interface, but we're...
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Data Masking for Parquet Files: A Comprehensive Guide
Data masking, also known as data obfuscation or data anonymization, is a method for protecting sensitive information in non-production environments. It...
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Parquet/Avro Reader
Parquet is a popular columnar storage format that is widely used for storing big data in the Hadoop ecosystem. It is an efficient way of storing large...
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What are Parquet files?
Parquet is a columnar storage format for big data processing. It is widely used in the Apache Hadoop ecosystem, as well as other big data frameworks, and is...
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