Private Online Excel (.XLSX) & CSV Spreadsheet Viewer
Inspect multi-sheet .xlsx, .xls, and .csv files in your browser, filter rows in real time, and export to JSON or CSV with 100% client-side privacy.
Drop an .XLSX, .XLS, or .CSV Spreadsheet Here or Click to Browse
Financial sheets, KDP royalty reports & student rosters are parsed locally in RAM — never uploaded.
| Column A | Column B | Column C | Column D |
|---|---|---|---|
| Sample Row 1 | Drop any .xlsx or .csv file above | 100% Local RAM | Zero Server Uploads |
How Client-Side Excel & CSV Parsing Protects Financial Data
Whether you are inspecting an Amazon KDP monthly royalty `.xlsx` report, a bank statement `.csv`, or a coaching institute fee ledger, uploading spreadsheets to cloud viewers exposes sensitive financial rows. Factictionary uses the open-source SheetJS engine inside your browser to parse binary BIFF8 (`.xls`), OpenXML (`.xlsx`), and delimited `.csv` workbooks directly in local memory.
Need to format or validate the exported JSON output? Open our Client-Side JSON Formatter & Validator or read our Browser Document Privacy Guide.