ライター・クリエイター向け

🛠️ 開発者向け

UUIDs, regex, hashes, and more。全13ツールがブラウザで無料実行できます。登録不要。

💬AI Code Commenter

Add Chinese comments to your code automatically using AI.

⏰Cron Expression Parser

Interpret a 5-field cron schedule expression.

🔐Hash Generator

Generate SHA hashes for any text using the browser Web Crypto API.

🌐IP Information Lookup

Look up any IP or your own — see location, ISP, and more.

🔑JWT Decoder

Decode any JWT into its header and payload for inspection.

🔐Secure Password Generator Online – Free Random Passwords

Generate strong, cryptographically secure random passwords right in your browser. Customize the length (up to 256 characters), choose which character types to include (lowercase, uppercase, numbers, symbols), and optionally avoid ambiguous characters like 0/O/l/I. Our password generator uses the Web Crypto API for maximum randomness — and everything runs locally, so your passwords are never transmitted.

🔐Password Strength Checker

Test how strong a password is with live, private feedback.

📱QR Code Generator

Generate QR codes from any text or URL entirely in your browser.

🎯Random Number Generator Online – Free Secure Random Numbers

Generate cryptographically secure random numbers within any range. Set minimum, maximum, count, and optionally exclude duplicates. Uses the Web Crypto API for maximum randomness.

🔌Random Port Generator

Get a random network port number in the valid range.

🔍Regex Tester

Test regex patterns against any text and see all matches with their positions.

🆔UUID / GUID Generator

Generate one or more UUID v4 (GUID) identifiers with cryptographic randomness.

📈Arithmetic Sequence Generator

Generate an arithmetic (linear) sequence.