# Online Minesweeper — online-minesweeper.io

> Free browser-based Minesweeper: Beginner, Intermediate, Expert, custom boards, daily mode. No signup, no ads required. First-click safe. Keyboard + screen-reader accessible.

## Game modes
- Beginner (9×9, 10 mines): https://online-minesweeper.io/beginner
- Intermediate (16×16, 40 mines): https://online-minesweeper.io/intermediate
- Expert (16×30, 99 mines): https://online-minesweeper.io/expert
- Daily challenge (new puzzle each day): https://online-minesweeper.io/daily/YYYY-MM-DD (e.g. /daily/2026-04-12)
- Custom board: https://online-minesweeper.io/?mode=custom&custom=ROWSxCOLSxMINES

## Content
- How to Play: https://online-minesweeper.io/how-to-play
- Strategy Guide: https://online-minesweeper.io/strategy
- Tips for Beginners: https://online-minesweeper.io/tips
- History of Minesweeper: https://online-minesweeper.io/history

## Key facts
- Free, no account required
- Progressive Web App (installable on mobile)
- First click is always safe — mines placed after first click
- Local best-time tracking via localStorage
- WCAG 2.1 AA compliant keyboard navigation
- Three classic difficulties plus custom and daily modes

## About
Operated by ASIOS Tech. Contact: ed@asios.tech