AI Spreadsheet Analyzer

Q: Does BaseToolbox upload my spreadsheet?

No. Parsing, planning, calculation, storage, and export run in your browser. The tool does not send file contents to BaseToolbox analytics.

Q: Does the AI model calculate spreadsheet totals?

No. The local model proposes a constrained plan and explains returned evidence. DuckDB performs the actual filters, groups, counts, and aggregates deterministically.

Q: Will the downloaded AI model survive a refresh?

Normally yes. Verified model weights are cached by version and reused after refresh or browser restart. The runtime instance is rebuilt from cached weights; clearing site data, private browsing, or browser storage eviction can require another download.

Q: Can I analyze every Excel workbook?

The tool supports modern XLSX workbooks within the displayed browser limits. It does not support legacy .xls files, macros, or desktop-Excel formula recalculation.

Ask questions about a CSV, TSV, or XLSX file in your browser. A local AI model proposes a constrained plan, you review it, and DuckDB performs the calculation deterministically without uploading your file.

Saved sessions

Drop a CSV, TSV, or XLSX file here

Your file stays in this browser. Legacy .xls files are not supported.

What do you want to learn?

AI only translates your question into a constrained, editable plan. DuckDB calculates the result from the selected sheet.

Local AI runtime

Checking this device

BackendWASM

Device profile—

Adaptive limits—

Writing model

Qwen 0.5B · standard

Transcription model

Whisper Tiny · fast

Files, prompts, and results stay in this browser. Browser storage can still be cleared by you, private mode, or browser cleanup.

Private, browser-local processing

The spreadsheet, question, analysis plan, and result remain in your browser. They are not sent to BaseToolbox analytics. Sessions use IndexedDB, source files use persistent browser file storage when available, and model weights are cached by version.

Current limitations

CSV, TSV, and modern XLSX files are supported; legacy .xls files are not.
Workbook formulas are read from stored values and are not recalculated like desktop Excel.
The local model can misunderstand a question, so the generated plan must be reviewed before calculation.
Browser storage can be cleared or reclaimed, and private browsing may not retain sessions, files, or downloaded model weights.

How local spreadsheet analysis works

Import and inspect

The browser parses the selected file, identifies worksheets and column types, and shows a preview before analysis.

Review the AI plan

The shared local model receives the table schema, not the full file, and proposes a constrained JSON plan using existing columns.

Calculate and export

After confirmation, local DuckDB runs the validated plan. You can inspect the evidence and export CSV, XLSX, or Markdown.