Excel to Parquet Online — Convert .xlsx to Analytics-Ready Parquet
By ParquetReader Team
Why convert Excel to Parquet
Excel is great for capture and collaboration, but not ideal for heavy analytics or scalable pipelines.
Parquet gives you compression, typed columns, and better downstream performance in warehouse or lake workflows.
Common Excel cleanup before conversion
Typical issues are mixed date formats, numeric values stored as text, and inconsistent empty values.
Use SQL to standardize columns before export so your Parquet schema stays predictable across monthly files.
Practical SQL checks
Check data quality before export: SELECT COUNT(*) FROM dataset WHERE amount IS NULL;.
Check type consistency by grouping suspicious values: SELECT region, COUNT(*) FROM dataset GROUP BY region ORDER BY COUNT(*) DESC;.
Export only what downstream systems need
You do not have to export every column. Build a stable export query with the exact fields used by dashboards and models.
Example: SELECT order_id, order_date, customer_id, amount, currency FROM dataset;.
Related guides
Excel to CSV for compatibility exports.
Excel support overview for full workflow details.
Need to open data files quickly? Use the Parquet Viewer Online tool to upload, inspect, and export in one workflow.