The "million row limit" in Excel is a relic. Even when using tools like VS Code or Notepad++ for large files, the memory pressure often makes the UI unusable.
DataOlllo is a lightweight viewer designed to stream data directly from disk. It handles massive CSVs and modern formats like Parquet and Arrow natively. It’s been helpful for my workflow when I just need to filter and export a subset of a massive dataset without spinning up a Jupyter notebook.
DataOlllo, Your Private AI Data Analyst — Analyze, Automate, Reuse.
DataOlllo helps you explore, analyze, and visualize your data with AI—fully offline and secure. Build reusable workflows, automate complex tasks, and get instant insights. No coding needed, just clicks and natural language.
Hi HN! I’m excited to share the newest version of Data.olllo, a local AI workflow automator for data processing, visualization, and reusable workflows.
What’s new
• Next-gen workflow engine: Build, save, and reuse workflows for any dataset
• AI-assisted automation: Generate steps or entire pipelines with AI agents
• Full local processing: Secure, offline, with no raw data sent to the cloud
• Scalable: Works from small CSVs to multi-GB datasets
Why it’s useful
• Clean, transform, and visualize data without writing code
• Apply saved workflows to similar datasets instantly
• Ideal for repetitive tasks, analytics, ecommerce data, logs, or any large dataset
Every week, Shopify sellers download sales CSVs and Facebook ad reports, then spend hours merging them in Excel just to figure out if they actually made money.
I got tired of that.
So I built Data.olllo
— a local desktop app that lets you open both CSVs, ask an AI assistant things like “calculate profit by campaign per month”, see the code it generates, preview the result, then click “Apply All” to run it safely on your full data. You can even visualize the outcome (income, outcome, profit) as interactive bar charts and save the whole workflow to rerun next week — all locally, no cloud uploads.
It turned what used to be a 2-hour spreadsheet task into a 10-second repeatable workflow.
I’d love feedback from the HN community — on the product, workflow design, or how to make the AI assistant smarter for real-world data tasks.
Current projects:
ZaGuu — negotiation games for AI agents. First game: Bank Heist. https://zaguu.com
Plotra — a canvas/world where AI agents can create and evolve visual identities. https://plotra.xyz
DataOlllo — a local desktop tool for large and sensitive data files. https://www.dataolllo.com