Local file exploration
Open and work with CSV, JSON, and Parquet files directly in the browser, with files shown on a canvas for exploration.
OpenSheet
OpenSheet is a browser-based spreadsheet and data exploration tool for local files and Google Sheets. It supports CSV, JSON, and Parquet files, with all processing happening locally in the browser.
Overview
OpenSheet is a browser-based spreadsheet and data exploration tool for working with local files and connected Google Sheets data. The site presents it as a way to analyze, visualize, and transform data without moving files into a separate desktop app or uploading them to an OpenSheet-managed server.
The product processes data locally in your browser and supports CSV, JSON, and Parquet files. It also offers Google Sheets import, edit, and sync workflows, plus optional AI features that use the Anthropic API with a user-provided key.
Features
Canvas-based browsing
Drop files onto the canvas or double-click a file to begin inspecting data without a separate import workflow.
Data analysis and transformation
Use the app to analyze, visualize, and transform data in a spreadsheet-like interface.
Search and keyboard navigation
Search the workspace and navigate with keyboard shortcuts such as command palette access and tab navigation.
Folder organization
Organize datasets into folders from the canvas so related files stay grouped together.
Google Sheets integration
Connect Google Sheets to import, edit, and sync spreadsheets from your browser, with communication handled directly between your browser and Google.
Use cases
Inspect local datasets
Load local CSV, JSON, or Parquet files into the canvas to inspect rows, browse datasets, and explore file contents without uploading them to a server.
Clean and reshape data
Use the spreadsheet interface to analyze and transform data while keeping processing inside the browser session.
Work with Google Sheets
Connect a Google Sheet, edit values in the app, and sync changes back to the spreadsheet in Google Drive.
Group project files
Organize several related files into folders so you can keep source data and derived datasets grouped together during exploration.
Add AI-assisted workflows
Use the optional Anthropic-backed AI features when you want assistance with data tasks and are willing to provide your own API key.
Pros and Cons
Pros
- Runs entirely in the browser, which keeps files local during normal use.
- Supports common data files such as CSV, JSON, and Parquet.
- Includes Google Sheets import, editing, and sync capabilities.
- Provides optional AI-powered features without OpenSheet operating the model backend.
Cons
- The source only confirms a small set of file formats and does not document broader import/export behavior.
- Pricing details are not visible in the collected pricing page text, so the commercial model is unclear from the available sources.
- AI features require a separate Anthropic API key, which adds setup for users who want them.
FAQ
How do I start using OpenSheet?
OpenSheet runs entirely in your browser, so you can start by opening the app and loading a file or dropping data onto the canvas. The source also shows you can double-click a file to explore it.
What file types does OpenSheet support?
The source states support for CSV, JSON, and Parquet files. It also describes OpenSheet as a browser-based data exploration and spreadsheet tool.
Does OpenSheet connect to Google Sheets?
Yes. The Terms and Privacy pages say OpenSheet has a Google Sheets integration that lets you import, edit, and sync spreadsheets through your browser.
Does OpenSheet include AI features?
OpenSheet offers optional AI-powered features through the Anthropic API, and you provide your own API key to use them.
Where does my data get processed?
OpenSheet says all data processing happens locally in your browser, with no server-side processing or cloud storage managed by OpenSheet.
Quick Facts
- Category
- Spreadsheet and data exploration
- Platform
- Browser-based web app
- Primary files
- CSV, JSON, Parquet
- Data handling
- Local processing in the browser
- Integration
- Google Sheets
- Source domain
- opensheet.app
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