JSON Formatter
Format, validate, minify, or sort JSON data with configurable indentation. Instantly check for syntax errors, view node count and nesting depth — free, no sign-up required.
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Developer Tools
Browse every developer tool in one place. Compare workflows, open individual calculators and utilities, and keep your internal linking consistent across the category.
Looking for something adjacent? Jump back to all categories or explore popular tools like BMI Calculator, Calorie Calculator and Jump Rope Calorie Calculator.
All Developer Tools
5 totalQR Code Generator
Generate QR codes for URLs, text, Wi-Fi credentials, vCards, and more. Customise foreground and background colour, error correction level, margin, and download as SVG or PNG — free and instant.
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Base64 Encoder / Decoder
Encode any text to Base64 (standard, URL-safe, or MIME) or decode any Base64 string back to plain text. Instant, free, no sign-up required.
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UUID Generator
Generate UUID v1, v4, v5, or Nil identifiers in bulk. Validate any UUID and detect its version. Copy instantly — no signup required.
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Hash Generator
Generate MD5, SHA-1, SHA-224, SHA-256, SHA-384 & SHA-512 hashes from any text. Supports hex, Base64, and Base64URL output, plus HMAC signing. Free and instant.
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Popular Across QuickTools
View homepage picks →BMI Calculator
Calculate your Body Mass Index, healthy weight range and ideal weight using metric or imperial units.
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Calorie Calculator
Estimate daily calorie needs based on age, gender, height, weight and activity level using Mifflin-St Jeor, Harris-Benedict or Katch-McArdle formulas.
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Jump Rope Calorie Calculator
Estimate calories burned while skipping rope using body weight, workout duration, jump style, rope type, and optional jump cadence. Review calories burned, calories per hour, total jumps, and practical workload notes.
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HIIT Calorie Calculator
Estimate calories burned during a HIIT workout using body weight, work and rest intervals, rounds, workout style, and optional warm-up and cool-down time. Review total calories, active calories, recovery calories, and session density.
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