Instantly Open, Clean, and Visualize Massive Data

No code. No cloud. Just click—analyze 100GB+ CSV, Excel, or JSON files in seconds, privately on your desktop.

No subscription needed. Just sign up and enjoy Pro for 7 days!

Live Demo

See Data.olllo in Action

Open Large CSV Files Offline

Effortlessly open and analyze 100GB+ CSV files on your desktop—no cloud, no lag.

No-Code CSV Viewer & Editor

Edit, filter, and visualize CSV, Excel, and JSON files instantly—no formulas or coding.

AI-Powered Data Cleaning (Incoming)

Let AI clean and structure your messy data with a click. Save hours on manual work.

Why Data.olllo?

Open Huge Files Instantly

No more crashes or waiting—open 100GB+ CSV, Excel, or JSON files in seconds, right on your desktop.

No-Code, No Learning Curve

Get started in minutes. Analyze and clean data with a simple, intuitive interface—no formulas or coding required.

AI-Powered Data Cleaning

Let AI fix messy data, remove duplicates, and structure your tables—save hours of manual work.

Instant Filtering & Visualization

Filter, search, and visualize your data with a click. Create charts and graphs instantly for better insights.

Total Data Privacy

Your data never leaves your device. All processing is 100% local—no uploads, no leaks, ever.

One-Click Export & Sharing

Export cleaned or visualized data in seconds. Share results with your team or clients effortlessly.

Simple, Transparent Pricing

Free

Free version: Open files with up to 30,000 rows each. Full access to all tools and charts.

Plus, enjoy 7 days of Pro features after sign up—no credit card needed.

Pro

Unlimited rows, priority support, and all features.

$5 monthly or

$30 annually

No hidden fees. Cancel anytime.

What Our Users Say

Real feedback from professionals and teams using Data.olllo.

TheTaytay

"Love seeing data processing move back to our own computers. Looking forward to the Mac version!"

dangerlibrary

"It's 2025 and CSVs still dominate data interchange. Glad to see a tool focused on this."

Lao Zhou PMP

"Great tool! I once thought about building something like this myself."

paddy_m

"Auto-cleaning and local processing are game changers. Excited to see where Data.olllo goes!"

morganherlocker

"People can and should expect better. Appreciate the focus on performance and package size."

ShingU

"Have you considered optimizing for log file analysis? That would be amazing!"

Frequently Asked Questions

Is my data ever uploaded to the cloud?

Never. All processing happens locally on your device for maximum privacy.

How big a file can I open?

There’s no artificial limit. Users have opened 100GB+ CSV files with Data.olllo.

Do I need to know code or formulas?

Nope! Everything is point-and-click, with AI help if you want it.

What happens after my trial?

You can upgrade to Pro for unlimited use, or keep using the free version with row limits.