CSV Spreadsheet

Why a Spreadsheet in Your Code Editor?

CSV files are everywhere in software projects — seed data, configuration, exports, test fixtures. Most editors show them as raw comma-separated text. Nimbalyst’s CSV Spreadsheet extension renders them as an interactive spreadsheet with editing, red/green diffs for AI changes that you approve, and sorting.

The underlying file stays a clean, git-friendly CSV. No proprietary formats, no lock-in.

Key Features

• Full spreadsheet UI — Column resizing, row selection, cell editing with a familiar spreadsheet experience.
• **Red/Green diff to show AI changes **— AI changes show up as red/green diffs, that you can review and approve
• Sortable headers — Click column headers to sort data ascending or descending.
• Source mode toggle — Switch to raw CSV text editing when you need to work with the underlying format.
• Configurable metadata storage — Store column widths and formatting as an inline comment or a separate sidecar file.

Use Cases

• Editing seed data and fixtures — Work with database seed files, test data, and CSV exports visually.
• Reviewing data exports — Open CSV exports from APIs, databases, or analytics tools for quick review.
• Configuration files — Edit CSV-based config files with proper column alignment.
• Data cleanup — Sort, filter, and fix data issues visually before committing changes.

How It Works

Open any .csv or .tsv file and it automatically renders as a spreadsheet. Use the source mode toggle to switch between visual and raw text editing. All changes save back to the original CSV format.