Password Generator
Create secure passwords with custom length and character rules.
Password Generator — what it does
Generate a random password of the length you choose, from any mix of uppercase, lowercase, digits and symbols, using the browser's cryptographic random source. Nothing is transmitted and nothing is stored, so the password exists only in your clipboard and wherever you decide to put it.
When this tool helps
- Creating a strong unique password for a new account instead of reusing an old one.
- Generating a service credential, API secret or database password.
- Producing a temporary password to hand to a colleague for a first login.
How to use it
- Set the desired length.
- Choose which character sets to include.
- Generate the password.
- Copy it straight into your password manager.
Accuracy, limits, and good practice
- Length beats complexity: a 20-character password from two character sets is far stronger than 8 characters using all four.
- Store generated passwords in a password manager immediately. A strong password you cannot recall is only useful if something remembers it for you.
- Some systems silently truncate long passwords or reject certain symbols — test the login once before relying on it.
Frequently asked questions
Is the randomness good enough?
It uses the browser's cryptographically secure random generator, which is the same source used for security-sensitive work in the browser.
How long should a password be?
At least 16 characters for anything important, and longer for accounts protecting money, email or infrastructure.
Is the password sent anywhere?
No. Generation happens locally and nothing is logged, stored or transmitted by this page.
Related tools on this site
- Export PDF Thumbnails — Render PDF pages as thumbnail images in a ZIP file
- CSV Viewer — Open and inspect CSV files
- Crop PDF Pages — Trim page margins by points on every PDF page
Everything above runs inside this page. Password Generator needs no account, no upload, and no server round trip — close the tab and nothing is left behind.
密碼產生器能做什麼
以瀏覽器的密碼學隨機來源，依你指定的長度與大寫、小寫、數字、符號的任意組合產生隨機密碼。不傳送、不儲存，密碼只存在於你的剪貼簿，以及你決定放進去的地方。
什麼時候用得上
- 為新帳號建立高強度的獨立密碼，而不是重複使用舊的。
- 產生服務憑證、API 密鑰或資料庫密碼。
- 產生交給同事首次登入用的臨時密碼。
使用步驟
- 設定所需長度。
- 選擇要包含的字元集。
- 產生密碼。
- 直接複製到你的密碼管理器。
精確度、限制與實務建議
- 長度勝過複雜度：用兩種字元集的 20 位密碼，遠強於四種字元集的 8 位密碼。
- 產生後請立刻存進密碼管理器。記不住的強密碼，只有在有東西替你記住時才有用。
- 有些系統會悄悄截斷過長密碼或拒收特定符號——正式使用前請先登入測試一次。
常見問題
隨機性夠好嗎？
它使用瀏覽器的密碼學安全隨機產生器，與瀏覽器中處理安全性工作所用的來源相同。
密碼該多長？
重要帳號至少 16 位；涉及金錢、電子郵件或基礎設施的帳號應更長。
密碼會被送到別處嗎？
不會。產生在本機完成，本頁不記錄、不儲存、也不傳送任何內容。
本站相關工具
以上步驟全部在這個頁面內完成，密碼產生器 不需要註冊、不上傳檔案、也不經過伺服器，關閉分頁後不會留下任何資料。