Skip to main content
FreeOnlineTools
English

Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal. Real-time conversion as you type.

Local processing

How to Use

Enter your input above. Results update automatically as you type. Use the download button to save the result.

Privacy

All processing happens in your browser. Your data is never uploaded to any server.

FAQ

Which number bases are supported?

Binary (2), Octal (8), Decimal (10), and Hexadecimal (16).

Related Tools

Local Hex Encoder / Decoder Encode text to hexadecimal and decode hex back to text in your browser. Free, online, no upload, fully private. Local Binary Text Converter Convert text to binary and binary back to text in your browser. Free, online, no upload, fully private. Local ASCII Table Reference Browse the full ASCII table with decimal, hex, octal, and binary values in your browser. Free, online, no upload. Local CSS Unit Converter Convert CSS units between px, rem, em, pt, mm, cm, and inches. Essential for responsive design.

Related Guides

reference Unit Conversion Reference: Length, Mass, Temperature, and Area A complete reference of conversion factors for length, mass/weight, temperature, and area, with exact formulas and worked examples for each. how-to How to Count Words, Characters, and Reading Time Accurately Learn how word and character counts are defined across languages, how to estimate reading time, and how to use a counter to hit limits for essays, tweets, and meta descriptions.

Continue Your Journey

📚 Learn Read "Unit Conversion Reference: Length, Mass, Temperature, and Area" A complete reference of conversion factors for length, mass/weight, temperature, and area, with exact formulas and worked examples for each. 📚 Learn Read "How to Count Words, Characters, and Reading Time Accurately" Learn how word and character counts are defined across languages, how to estimate reading time, and how to use a counter to hit limits for essays, tweets, and meta descriptions. 🔧 Explore Try "Hex Encoder / Decoder" Encode text to hexadecimal and decode hex back to text in your browser. Free, online, no upload, fully private. 🔧 Explore Try "Binary Text Converter" Convert text to binary and binary back to text in your browser. Free, online, no upload, fully private. 🔧 Explore Try "ASCII Table Reference" Browse the full ASCII table with decimal, hex, octal, and binary values in your browser. Free, online, no upload.