15 free tools · No sign-up · Nothing uploaded

Free spreadsheet & data tools

Every tool below runs entirely in your browser — files are read, converted, merged, or compared with JavaScript on your own machine, and nothing is ever uploaded to a server. Pick a tool to get started.
Free tool

Invoice Generator

Build a professional invoice and download it as PDF, Excel with live formulas, or CSV.

Free tool

Balance Sheet Generator

Build a balance sheet with a live equilibrium check and export to Excel with formulas, PDF, or CSV.

Free tool

JSON to Excel Converter

Paste or upload JSON and get a real .xlsx or .csv, with nested objects flattened automatically.

Free tool

XML to Excel Converter

Drop an XML export and auto-detect the repeating record element to flatten into a spreadsheet.

Free tool

Compare Spreadsheets

Diff two .xlsx or .csv files and see exactly which rows were added, removed, or changed.

Free tool

Excel to JSON Converter

Turn an .xlsx or .csv into JSON — array of objects or arrays, with multi-sheet support.

Free tool

CSV to XLSX Converter

Convert one or many CSV files to real .xlsx workbooks with delimiter and encoding auto-detection.

Free tool

HTML to Excel Converter

Paste HTML and export every table it contains as its own sheet in a downloadable .xlsx file.

Free tool

Merge Excel Files Online

Combine multiple spreadsheets into one — stack rows with smart column matching, or keep separate tabs.

Free tool

Bank Statement to Excel

Turn a text-based bank statement PDF into a spreadsheet, with a running-balance check — the file never leaves your browser.

Free tool

Hourly Invoice Generator

Bill by the hour from a timesheet, with overtime lines, and export to PDF or Excel.

Free tool

Freelance Invoice Generator

A clean freelancer invoice with deposit and payment terms, downloadable as PDF or Excel.

Free tool

Proforma Invoice Generator

Quote international shipments with Incoterms and HS codes, then export the proforma as PDF or Excel.

Free tool

Commercial Invoice Generator

Customs-ready commercial invoice for exports, with country of origin and harmonized codes.

Free tool

Construction Invoice Generator

Progress billing with retainage held per line, exported as PDF or Excel with live formulas.

Beyond one-off conversions

Need a spreadsheet built to run your business, not just hold data?

These tools get your data into shape. Our templates go further — dashboards, automations, and data validation built in, tested to the cent, in matching Excel and Google Sheets versions.

Browse premium templatesSee free templates