Miscellaneous tools
Handy browser-based tools that don't fit neatly into one category — barcodes, ISBN lookup, size converters, gear ratios, and weather unit conversions.
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条码生成器
为任何文字或数字生成 Code 128 条码，下载 PNG，100% 在用户端运行。
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ISBN 验证
验证 ISBN-10 与 ISBN-13 号码、检查校验码，并在格式间转换。
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各国车牌格式查找
查找世界各国的车牌格式、字符规则与示例车牌。
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各国邮递区号格式
查找世界各国邮递区号的格式与 regex 样式，并验证任意邮递区号。
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内衣尺寸换算
在美规、英规、欧规、法/比、澳/纽与意大利尺寸系统间实时换算内衣尺寸。
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鞋子尺寸换算
在美规、英规、欧规与公分之间换算男女鞋尺寸，涵盖所有主要标准。
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戒指尺寸换算
在美规、英规、欧规（周长）与日规之间换算戒围，或依直径量测。
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帽子尺寸换算
在美规、英规与欧规之间换算帽子尺寸，或依头围计算尺寸。
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齿轮比计算机
从齿轮齿数计算齿轮比、输出 RPM、扭力倍率与速度。
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天气单位换算
换算天气量测单位：气温、气压、风速、能见度与露点。
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Why use browser-based miscellaneous tools?
These tools run entirely inside your browser — no files are uploaded, no data is logged, and no account is required. Whether you're generating a barcode, converting clothing sizes across international standards, or calculating gear ratios for a mechanical project, everything happens locally on your device.
Frequently Asked Questions
- Are these tools free?
- Yes — all tools on this page are completely free with no signup and no usage limits.
- Does my data leave my device?
- No. All processing runs in JavaScript inside your browser. Nothing is sent to any server.
- Do they work on mobile?
- Yes. Every tool is mobile-first and works on iPhone Safari and Android Chrome.