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Universal Number Base Converter

Convert numbers between Binary, Decimal, Hexadecimal, and Octal bases in real-time. 100% offline accuracy. Fast, free, and 100% private browser tool.

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Processed 100% locally in your browser. Your files never touch an external server.

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100% Client-Side PrivacyNo File Size LimitsFree Forever

About Universal Number Base Converter

FusioFiles 100% Client-Side Privacy Guarantee

Your files and data never leave your browser — processed directly on your device.

Zero Server UploadsExecution occurs entirely in browser memory via WebAssembly and HTML5 Canvas.
HIPAA & GDPR ReadySafe for confidential tax forms, medical records, financial sheets, and legal contracts.
Zero Cloud LatencyInstant results with no upload delays, server queues, or third-party tracking.
Automatic RAM PurgeBuffers and caches are automatically wiped clean the instant you close the tab.
1

Enter Number

Type your number into any field (Decimal, Binary, Hex, or Octal).

2

Instant Conversion

The tool automatically converts your input to all other bases instantly.

3

Copy Result

Click the copy icon next to any value to save it to your clipboard.

4

Reset

Use the Reset button to clear all fields and start over.

A versatile tool for programmers and students to convert numbers between different numeral systems. Supports concurrent conversion: type in one field, and all others update instantly.

Key Features

All Bases

Convert between Binary, Octal, Decimal, and Hexadecimal.

Concurrent Conversion

Type in any field and see all others update simultaneously.

Error Checking

Prevents invalid input (e.g., '2' in binary mode).

Developer Tool

Perfect for debugging low-level data and memory addresses.

Frequently Asked Questions

It uses JavaScript's native integer precision. Extremely large numbers might lose precision or require BigInt support (future update).

No, this tool is for numerical values. Use our 'Text to Binary' tool for converting strings.

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