Open the file locally
Inspect large CSV files on your own device, including multi-gigabyte exports and datasets with millions of rows.
Large CSV problem
CSV too large for traditional spreadsheets?
DataOlllo is built for the moment when a CSV grows beyond normal spreadsheet-style workflows, but the file is still too important or too private to upload.
Work without formulas
Filter, split, merge, sort, and summarize through visual workflows instead of fragile manual formulas or one-off scripts.
Keep sensitive data close
Customer records, financial exports, research data, and operational logs can stay on your machine during analysis.
Common questions
What should I do when a CSV is too large to open?
Use a local tool designed for large files. DataOlllo can preview, filter, split, merge, and analyze large CSV datasets without requiring a cloud upload.
Can DataOlllo handle private CSV files?
Yes. DataOlllo is designed for local-first workflows so sensitive columns and raw files can remain on your device.