The 10GB+ CSV Viewer.

Traditional spreadsheets crashed? Notepad frozen? DataOlllo opens massive files in seconds to let you view, filter, and export what you need.

Download Viewer FreeDownloads standard DataOlllo PC App

View Massive Files Without Crashing

BEFORE
Traditional spreadsheets freezing on 500MB Parquet/CSV.
Traditional Spreadsheets - large_dataset.csv
Not Responding
Loading row 1,048,576 / 15,000,000
↓
AFTER
DataOlllo Streams Native Formats.
dataset_15M_rows.parquet
Loaded in 1.2s
user_id
event_type
metadata_json
UID-99120
page_view
{"loc":"US","ref":"google"}
UID-99121
click
{"btn":"signup"}
Renders instantly. Supports Parquet, JSON, Arrow, CSV & more.

Open Multi-Format Data Locally

Beyond CSV limits

Traditional spreadsheets caps out at 1,048,576 rows. DataOlllo can effortlessly load, view, and filter 50,000,000 row CSV files on a basic laptop.

Modern Formats

Stop writing Python scripts just to see what's inside a Parquet or HDF5 file. Open Arrow, JSON, SAS, SPSS, and SQLite natively.

Streaming Architecture

DataOlllo streams the data directly from your disk instead of attempting to load it all into RAM, ensuring your PC never crashes.

No Uploads Required.

Why upload a 5GB file to the cloud just to see the first 10 rows?
DataOlllo streams it directly from your hard drive.

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