Base Converter | Free Universal Base Converter Tool 2026

Base Converter: Convert Numbers Between Any Base (2-36)

Convert numbers between binary, octal, decimal, hexadecimal, and any custom base from 2 to 36. Perfect for computer science students, programmers, and math enthusiasts.

Enter number and base values.

📊 Conversions: 0

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📸 Live preview — Universal base conversion.

Why Use a Universal Base Converter?

Different number systems are used in computing: binary (base‑2) for machine code, octal (base‑8) for file permissions, decimal (base‑10) for humans, hexadecimal (base‑16) for color codes and memory addresses. Our converter supports any base from 2 to 36 (using digits 0‑9 and letters A‑Z). Convert effortlessly between binary, octal, decimal, hexadecimal, and custom bases.

📌 How to Use

Enter the number you want to convert.
Select the source base (the base of the number you entered).
Select the target base (what you want to convert to).
Click "Convert".
Copy the result.

✨ Features

🔢 Supports base 2‑36

📦 Binary, octal, decimal, hex

⚡ Instant conversion

📋 One-click copy

🆓 Unlimited free

🔍 Most Searched Keywords

base converterbinary to decimalhex to binaryoctal to decimal

⚙️ How It Works

We parse the input number according to the source base using parseInt(value, fromBase). Then we convert the decimal value to the target base using toString(toBase).

🎯 Benefits

✅ Learn number systems.
✅ Quick conversions for coding.
✅ Free and private.

🔗 Related Tools

❓ FAQ

❓ What bases are supported?
2 through 36 (digits 0-9, A-Z).

❓ Can I convert negative numbers?
Yes, works with signed integers.

❓ Is it free?
Yes, forever.