Free tools to learn, clean and compare your spreadsheets
Practice Excel and Google Sheets formulas, grab ready-made templates, catch bad data before it bites, and reconcile two sheets in seconds. Everything runs in your browser โ your files never leave your computer.
All tools
Pick a tool to get started. No sign-up, no install.
Excel Exercises
Practice formulas with instant feedback
Open tool โGoogle Sheets Exercises
QUERY, ARRAYFORMULA, FILTER & more
Open tool โRandom Practice
Mixed questions from Excel, Sheets or both
Open tool โFree Templates
Budgets, trackers, invoices โ XLSX & CSV
Open tool โValidate & Clean Up
Find errors, duplicates and fix data
Open tool โCompare & Reconcile
Diff two sheets by key column
Open tool โFormula Reference
Searchable Excel vs Sheets cheat sheet
Open tool โFile Converter
CSV โ XLSX โ JSON โ HTML / Markdown
Open tool โMerge & Split
Combine files or split by column value
Open tool โ๐ Private by design
Files you open are read with JavaScript inside your browser tab. Nothing is uploaded, stored or logged on our servers.
๐ Works with your files
Open .xlsx, .xls, .csv, .tsv, .ods and .json, or paste cells straight from Excel or Google Sheets.
๐ฏ Learn by doing
Each exercise shows real sample data, checks your formula instantly and explains the solution, with Excel and Sheets differences.
Frequently asked questions
Are these tools really free?
Yes. Every tool, exercise and template on this site is free to use. The site is supported by ads.
Do you upload or store my spreadsheets?
No. The cleanup, compare, converter and merge tools read your file locally in the browser. Close the tab and the data is gone.
Can I use the templates in Google Sheets?
Yes. Download the XLSX version, then in Google Sheets choose File โ Import โ Upload. Formulas and formatting carry over.
Which file sizes are supported?
Most files up to ~50 MB work well on a modern computer. Very large files depend on your device's memory.