OpenSheet

What it does

A modern spreadsheet and data exploration tool. Analyze and transform your data with ease.

In the maker’s words, at launch

Hi folks. I've been doing some experiments on how LLMs could get more handy in the day to day of working with files (CSV, Parquet, etc). Earlier last year, I built https://datakit.page and evolved it over and over into an all in-browser experience with help of duckdb-wasm. Got loads of feedbacks and I think…

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  Rows2021 · rows.com · ▲511

  Import business data and analyze it using plain language.

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  Open-source, browser-local data exploration using DuckDB-WASM and PRQL2024 · github.com · ▲227

  Hey HN! We’ve built Pretzel, an open-source data exploration and visualization tool that runs fully in the browser and can handle large files (200 MB CSV on my 8gb MacBook air is snappy). It’s also reactive - so if, for example, you change a filter, all the data transform blocks after it re-evaluate automatically. You can try it here: https://pretzelai.github.io/ (static hosted webpage) or see a demo video here: https://www.youtube.com/watch?v=73wNEun_L7w You can play with the demo CSV that’s pre-loaded (GitHub data of text-editor adjacent projects) or upload…

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  I built a spreadsheet app with Python to make data science easier2019 · hackernoon.com · ▲84

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  A terminal spreadsheet editor with Vim keybindingsApr 2026 · github.com · ▲126

  While speccing out this spreadsheet tool, I realized that I never had to think about the keybindings. It all just came naturally from Vim. Normal/insert/visual modes, hjkl navigation, dd/yy/p, :w, :q. The usual muscle memory works. It supports CSV/TSV import and export, and a native .cell format that preserves formulas. The formula engine handles SUM, AVERAGE, COUNT, MIN, MAX, and IF with range references. The codebase is a Cargo workspace: a pure cell-sheet-core library (no TUI dependency) and a cell-sheet-tui crate on top of ratatui. Early days, but it's usable. To…

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  MySheet.ai2025 · parseclabs.ai · ▲10

  Hi HN, I've been tinkering/building AI applications that require interaction with spreadsheets (Excel / Google Sheets). Realized that LLMs don't work off-the-shelf when it comes to producing correct, reliable output for spreadsheets, regardless of how you wish to encode it (JSON, markdown, XML, etc.) After prompting, fine-tuning LLMs to work for my applications, decided to expose the functionality as an API to this community. Eager to see if it is helpful/of interest to others. Let me know if you need an invite.

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