Understand the workbook first
Ask the agent to identify input sheets, formulas, charts, named ranges, and structural risks before it changes a cell.
AI spreadsheet editor
Edit Excel spreadsheets with AI.
Open real XLSX, XLS, and CSV files. Ask the agent to inspect formulas, analyze data, make focused edits, or turn a workbook into an editable report or presentation.
XLSX, XLS, and CSVEditable DOCX and PPTX outputsFree plan available
Nebula WriterFileEditViewHelp
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Spreadsheet24 populated rows216 populated cells
v0.4.8Source open
Work with the file you already have
An AI Excel editor that starts with the workbook.
Nebula Writer works inside a project folder instead of making you flatten a workbook into a chat attachment. Inspect the spreadsheet first, define a narrow task, and verify the result in the grid.
Make bounded Excel edits
Update selected values or formulas while keeping the request focused on the sheets, ranges, and formatting you specify.
Analyze spreadsheet data
Use workbook data to surface trends, variances, risks, and charts without separating the analysis from its source files.
Create editable reports
Turn spreadsheet findings into a DOCX report or PPTX presentation that remains editable after the agent finishes.
Excel to report AI
Turn spreadsheet data into finished work.
Use an Excel workbook as the evidence for a decision-ready report or presentation. Nebula Writer can keep source cells attached to the analysis while creating a separate, editable deliverable.
Explore complete document workflows- 01
Open the source workbook
Keep the spreadsheet beside the documents and presentations that depend on it.
- 02
Ask for an inspection
Identify relevant sheets, formulas, charts, and structural risks before requesting changes.
- 03
Create the deliverable
Generate a DOCX report or PPTX deck from the selected workbook evidence.
- 04
Review and hand off
Check source cells, formulas, formatting, and the final editable output before sharing.
Supported spreadsheet formats
Choose the format based on the structure the finished file needs to retain.
XLSX
Edit modern Excel workbooks with multiple sheets, formulas, formatting, charts, and workbook structure.
XLS
Open and edit legacy Excel workbooks, then use Save As to preserve the result as an XLSX file.
CSV
Work with flat tabular data when formulas, multiple sheets, and workbook formatting are not required.
Frequently asked questions
AI spreadsheet editing, explained.
What is an AI spreadsheet editor?
An AI spreadsheet editor combines a workbook grid with an AI assistant that can inspect spreadsheet structure, analyze data, and make requested changes. Nebula Writer keeps the workbook visible so you can review the cells, formulas, formatting, and resulting files.
Can AI edit an existing Excel file?
Yes. Nebula Writer can open existing XLSX, XLS, and CSV files. You can ask the agent to inspect a workbook or make a bounded change, then review the affected data and structure before using the result.
Can Nebula Writer generate a report from Excel?
Yes. The agent can use selected workbook sheets as evidence and create a separate, editable DOCX report or PPTX presentation. The original spreadsheet can remain unchanged as the source of truth.
Does Nebula Writer replace Microsoft Excel?
Nebula Writer covers common workbook editing, formulas, formatting, charts, and AI-assisted analysis. For macros, specialized Excel features, or high-stakes compatibility, verify the final workbook in Microsoft Excel.
Does the AI automatically receive every spreadsheet in my project?
No. Project context is task-scoped. You choose the workbook and relevant files for the request instead of treating every file in the project as automatic context.
Bring AI to the spreadsheets already in your project.
Download Nebula Writer, open an Excel workbook, and start with a focused inspection or reporting task.