Product Feed CSV to Parquet for Analysis

A large catalogue or years of feed snapshots are slow to load as CSV. Parquet is smaller and keeps the types.

Open the CSV to Parquet converter and drop the feed with type detection on. Prices and stock become numbers, and you can keep SKUs as text.

Parquet keeps a type for every column, so set numbers, dates and text before you export, and read the file back to check it.

Parquet suits analysis, not uploads: marketplaces and shops still take CSV. Keep the CSV for the importer and use Parquet for reports and history.

Everything runs in your browser and nothing is uploaded.

Open the CSV to Parquet converter

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How to use the CSV to Parquet converter: step by step

Open the CSV to Parquet converter.
Drop the feed with type detection on.
Check types and row count.
Download Parquet.

When to use the CSV to Parquet converter

Analyse prices and stock over time
Shrink old feed snapshots
Load a catalogue into a warehouse
Speed up notebooks

Example

Input: id,name,age 1,Ada,36 2,Alan,41

Output: A Parquet file with the same columns (id, name, age) and typed values.

Frequently asked questions

How do I convert CSV to Parquet?

Drop your CSV file (or paste the data), check the options, click Convert and download the Parquet result.

How big can a file be?

It depends on your device. A few hundred MB usually works.

Which conversions does the Format Converter support?

Any direction between JSON, CSV, Parquet and Excel (.xlsx), for one file or a whole folder. Nested JSON is flattened into columns such as address.city. For Excel, the first sheet is read; old .xls files are not supported.

Why did my number or date change after converting?

Types are detected from the values. Turn off "Detect types" to keep everything as text, which also keeps leading zeros in IDs and phone numbers.

Tip: Keep the CSV for the importer. Use Parquet only for analysis.