密码熵值计算器
估算密码强度与暴力破解所需时间。
关于「密码熵值计算器」
它属于「编码加密」分类：常见编码、哈希与转义，全部在本地计算。
- 根据字符池大小与长度估算密码的信息熵（bit），并给出强度评级。
- 熵越高越难被暴力破解；本估算仅基于字符种类，不判断字典词等语义弱口令。
- 处理在本地完成，密码不会上传。
完全免费、无需注册；所有处理都在浏览器本地完成，文件不会上传到任何服务器。
相关关键词：密码熵值计算器、编码加密、熵、强度、安全、在线工具、免费
如何使用「密码熵值计算器」
- 打开工具：打开「密码熵值计算器」页面，无需注册、无需安装任何软件。
- 准备输入：准备好要处理的内容或文件：文本可直接粘贴，文件可拖入页面（本工具属于「编码加密」）。
- 填入内容：把内容粘贴进输入框，或把文件拖入页面；也可以点击「示例」先填入样例数据试一下。
- 设置选项并处理：按需调整页面上的选项，然后点击处理 / 转换 / 生成按钮。
- 获取结果：处理完全在浏览器本地完成，结果可直接复制或下载，文件不会上传到任何服务器。
常见问题
- 熵是什么？
- 衡量随机性的指标；位越多，猜测所需尝试次数呈指数增长。
- 评级很弱但系统说可用？
- 很多系统只看长度/字符类型；本工具从抗暴力破解角度给出更严格建议。
Password Entropy (English)
Estimate password strength and brute-force time.
Belongs to “Encoding & Crypto”: Common encodings, hashes and escaping — all computed locally.
- Estimates a password’s information entropy (bits) from pool size and length, then rates its strength.
- Higher entropy is harder to brute-force; this estimate is based only on character classes, not dictionary/semantic weaknesses.
- Processing is local; the password is never uploaded.
Free, no sign-up; everything runs locally in your browser and files are never uploaded.
Keywords: Password Entropy, Encoding & Crypto, entropy, strength, security, online tool, free
How to use it
- Open the tool：Open the “Password Entropy” page — no sign-up and nothing to install.
- Prepare the input：Prepare the content or file to process: paste text or drop a file onto the page (this tool belongs to “Encoding & Crypto”).
- Provide the input：Paste your content into the input box or drop a file onto the page; you can also click “Sample” to try example data first.
- Adjust options and run：Adjust the options if needed, then click the process / convert / generate button.
- Get the result：Everything runs locally in your browser; copy or download the result — your files are never uploaded.
FAQ
- What is entropy?
- A measure of randomness; more bits means the number of guesses grows exponentially.
- Weak rating but the system accepts it?
- Many systems only check length/character types; this tool gives stricter advice from a brute-force-resistance view.
More tools in Encoding & Crypto
- Base64 Encode/Decode — Convert text to/from Base64, plus file to Base64.
- URL Encode/Decode — encodeURIComponent-level escaping and unescaping.
- HTML Escape — Escape and unescape HTML entities.
- Hash Calculator — Compute SHA-1/256/384/512 of text or files.
- MD5 Hash — Pure front-end MD5 digest computation.
- Morse Code — Convert text to/from Morse code, with beep playback.
- Radix Converter — Convert numbers between any bases 2–36.
- Unicode Converter — Convert Chinese to/from \u escape sequences.
- JWT Decoder — Decode JWT header and payload, show expiry.
- Random Password Generator — CSPRNG-based strong passwords, batch supported.
- UUID Generator — Batch-generate v4 UUIDs, optional upper-case and no dashes.