All Tools

Format, beautify, minify, and validate YAML with syntax highlighting, an interactive tree view, sort keys, and real-time error reporting with line numbers.

Open, view, sort, search, and edit CSV files in a spreadsheet-like table. Upload or paste data, edit inline, then download or copy the result.

Find your 5 target heart rate training zones from your age, with Simple or Tanaka Max HR formulas and % of Max HR or Karvonen methods.

Predict your ovulation day and fertile window from your menstrual cycle length. View a 3-month cycle calendar and a daily fertility probability chart.

Estimate your blood alcohol content using the Widmark formula. Enter your weight, gender, drinks, and hours drinking to see your impairment level and time to sober.

Find your waist-to-hip ratio (WHR) and see your WHO risk category, body shape (apple or pear), and a separate waist circumference risk check on a visual gauge.

Format, minify, and validate JSON instantly with syntax highlighting, a collapsible tree view, and real-time error detection.

Convert JSON arrays to CSV with table preview, nested object flattening, and customizable comma, tab, semicolon, or pipe delimiters.

Find out how much water to drink each day based on your weight, activity, and climate. Get results in liters, ml, oz, and glasses, plus an hourly drinking schedule.

Find your best bedtime or wake-up time based on 90-minute sleep cycles, so you wake at the end of a cycle feeling refreshed instead of groggy.

Check blood type compatibility for donation, transfusion, and pregnancy. Instantly see if blood types match, find compatible donors, and assess Rh factor risk for expecting parents.

Calculate your Body Mass Index from weight and height. See your health category on a visual gauge, plus your healthy weight range and personalized tips.