A spreadsheet that just works

Name: SingleSheet
Author: SingleSheet

No sign-up. No install. No tracking.

SingleSheet runs entirely in your browser and saves your data locally — nothing leaves your device.

Open SingleSheet — it's free

Works in any modern browser · No account required

Everything you need in a spreadsheet

Formulas that work like you expect

Use =SUM(A1:A10), =AVERAGE(B1:B20), =IF(C1>0,"Profit","Loss"), and more. SingleSheet supports the most common spreadsheet formulas, including cross-sheet references like Sheet2!A1.

Multiple sheets, one tab

Add as many named sheets as you need. Rename them, delete them, and reference cells across sheets — all without leaving the page.

Number formatting built in

Display values as plain numbers, currency ($1,234.56), percentages, or integers. Formatting applies per-cell and persists with your saved data.

Your data stays in your browser

SingleSheet saves your spreadsheet automatically to your browser's local storage. No servers, no cloud sync, no sign-in required. Your data never leaves your device.

Undo, redo, copy, paste

Full undo/redo history. Copy and paste ranges across sheets — formulas adjust their cell references automatically, just like a desktop spreadsheet.

Bold, italic, and more

Apply bold and italic formatting to any cell with Ctrl+B and Ctrl+I. Resize columns and rows by dragging the header borders.

How it works

Open the app — no loading screen, no onboarding, no account.
Click a cell and start typing a value or formula starting with =.
Use the formula bar, format toolbar, and sheet tabs just like a desktop spreadsheet.
Close the tab and come back — your data is still there.