Clean messy exports
Remove duplicates, select columns, fix structure issues, and prepare large files for reporting or downstream systems.
Local CSV analysis
Analyze large CSV files on your own device
DataOlllo helps you turn oversized CSV exports into useful answers while keeping raw data local.
Summarize quickly
Group records, calculate counts, and explore patterns without moving sensitive data into hosted tools.
Merge related datasets
Combine large files from multiple systems into one analysis-ready dataset using no-code workflows.
Common questions
How do I analyze a large CSV file privately?
Use a local-first workflow. DataOlllo lets you open, filter, clean, merge, and summarize large CSV files while the raw data stays on your computer.
What file types can DataOlllo work with?
DataOlllo supports CSV and other data formats used in large-file workflows, including JSON, Parquet, and HDF5.