Number base converter
Convert between binary, octal, decimal, and hex (BigInt)
Interactive controls load with JavaScript. Processing stays in your browser.
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How to use
- 输入数值并选择输入进制，自动输出四进制结果。
- 支持 0x/0b/0o 前缀写法。
- 使用 BigInt，可处理大整数。
- 本地换算，不上传。
FAQ
Does Number base converter upload my data?
No. Number base converter runs locally in your browser and does not upload content to www.518882.com or third-party APIs.
Do I need an account?
No. Open and use — no signup, login, or paywall. Open Number base converter and use it — no signup, login, or paywall.
How is this different from upload-based tools?
Tools run locally in your browser; content is not sent to our servers for processing — suited to private text and drafts.
Are there limits?
Limited by device memory and the browser; very large inputs may slow the page. There is no account quota.