Offline Data Cleaning Tool
for Messy CSV & Traditional Spreadsheets Files

Automatically fix inconsistent date formats, currencies, IDs, and text noise — even in 10GB+ files. No Python. No cloud. Just clean data.

Start Cleaning for FreeDesktop app · Works fully offline

Before & After — Instantly

DataOlllo detects mixed formats like 12/31/2025, 2025-31-12, currency symbols, broken encodings, and normalizes them in one step.

MESSY DATA
Mixed formats, noisy text.
DateOfPurchase
Price Paid
Status
12/31/2025
USD$ 45.99__
ok
2025-01-15
45.99 (Refund)
FAILED#1
↓
AI CLEANED
1-Click Local Normalization.
DateOfPurchase
Price Paid
Status
2025-12-31
45.99
OK
2025-01-15
45.99
FAILED

Built for Dirty Datasets

Automated Normalization

Instantly fix dates, currencies, and null values. DataOlllo's local AI engine detects formatting inconsistencies and normalizes them automatically.

Massive File Support

Clean CSV, spreadsheets, and JSON files far beyond traditional spreadsheets limits. Comfortably process 10GB, 50GB, or even 100GB datasets locally.

Deduplicate & Extract

Remove duplicate records with fuzzy matching, split complex text into columns, and scrub PII before sharing data.

Built for people who hate cleaning data

Analysts, ops teams, ecommerce sellers, and founders who just want their data usable — fast. If traditional spreadsheets feels fragile and cloud tools feel risky, DataOlllo fits.

Download DataOlllo →