Number Base Converter

二进制、八进制、十进制、十六进制互转。

4 Bases

Binary, Octal, Decimal, Hexadecimal.

BigInt Support

Handles arbitrarily large numbers.

Copy Result

One-click copy to clipboard.

Client-side

All processing in your browser. No data uploaded.

关于Number Base Converter

Number base conversion is a fundamental concept in computer science and digital electronics. While humans naturally use base-10 (decimal), computers internally represent all data in base-2 (binary). Programmers and engineers regularly need to switch between four key number bases: binary (base-2, using digits 0–1), octal (base-8, using digits 0–7), decimal (base-10, using digits 0–9), and hexadecimal (base-16, using digits 0–9 and A–F). Hexadecimal is especially prevalent in web colours (#FF5733), memory addresses, byte representations, and debugging output because each hex digit maps exactly to four binary bits, making it far more compact than binary. This converter accepts a number in any of the four bases and instantly shows the equivalent value in all other bases. It uses JavaScript BigInt internally, so it correctly handles arbitrarily large numbers that exceed standard 64-bit floating-point precision — you can convert numbers with hundreds of digits without loss. Each result includes the standard notation prefix (0b for binary, 0o for octal, 0x for hexadecimal) and a one-click copy button.

如何使用Number Base Converter

  1. Select the base of the number you want to enter: Binary, Octal, Decimal, or Hexadecimal.
  2. Type your number into the input field. Valid characters are shown based on the selected base (e.g., only 0 and 1 for binary).
  3. All four base representations appear instantly in the results panel below.
  4. The currently selected input base is highlighted in the results for easy reference.
  5. Click the Copy button next to any result to copy just that value to your clipboard.
  6. Switch between bases at any time — the input clears automatically to prevent invalid entries.

常见问题

Why is hexadecimal so common in programming?

Each hexadecimal digit represents exactly 4 binary bits (a nibble), so a byte (8 bits) can be written as exactly 2 hex digits. This makes hex far more compact and readable than binary, which is why it appears in colour codes, memory addresses, and binary file formats.

What is the largest number this tool can handle?

This tool uses JavaScript's BigInt type, which can represent integers of arbitrary size. There is no practical upper limit on the number of digits you can convert.

How do I convert a negative number?

This tool currently handles non-negative integers. For negative numbers in binary you would typically use two's complement representation, which depends on the bit width (8, 16, 32, 64 bits) — a more specialised tool is needed for that.

What are the valid characters for each base?

Binary accepts only 0 and 1. Octal accepts 0–7. Decimal accepts 0–9. Hexadecimal accepts 0–9 and A–F (or a–f — both are accepted and results are shown in uppercase).

Why does the prefix 0x, 0b, or 0o appear in the results?

These are standard programming notation prefixes: 0x denotes hexadecimal, 0b denotes binary, and 0o denotes octal. They are used in most programming languages (JavaScript, Python, C, etc.) to distinguish numeric literals from decimal numbers.

Number Base Converter 完全使用指南与免费在线工具

无需安装、完全免费、纯前端本地运行的高效 Number Base Converter 工具

用于快速解决：二进制、八进制、十进制、十六进制互转。。无需安装复杂软件，打开网页即可立即使用，极速且安全。

为什么选择 Metoolzy 的 Number Base Converter？

  • 秒级即时响应: 极致性能优化，输入即可见结果。
  • 数据绝对安全: 纯浏览器本地计算，数据绝不上传服务器。
  • 完全免费使用: 无需注册登录，无任何隐形消费。

三步快速上手

  1. 打开 Metoolzy Number Base Converter 工具页面。
  2. 在输入区粘贴或上传您的数据。
  3. 即时查看处理结果并点击复制或下载。

功能对比表

对比项 Metoolzy Number Base Converter 普通在线工具 本地客户端软件
使用成本 永久免费 有次数限制或收费 需购买授权
隐私保护 纯本地内存运行 数据需上传云端 本地运行

适用人群与应用场景

  • 软件开发人员日常调试与数据转换
  • UI/UX 设计师资产处理
  • 运营与办公人员效率提升

常见问题解答 (FAQ)

处理的数据会被记录或保存吗？

绝不会。所有运算均在您的浏览器本地完成，没有任何数据回传。