開発者ツール

プログラマーと開発者のための無料ツールです。

データ
Data

JSON Formatter

Format, validate, and beautify JSON data with syntax highlighting

XML Formatter

Format and validate XML documents with proper indentation

YAML Converter

Convert between YAML, JSON, and other data formats

CSV to JSON

Convert CSV data to JSON format and vice versa

Base64 Converter

Encode and decode Base64 strings and files

URL Encoder/Decoder

Encode and decode URLs for safe transmission

セキュリティ
Security

JWT Decoder

Decode and verify JSON Web Tokens with claims

Hash Generator

Generate MD5, SHA-1, SHA-256 hashes instantly

Password Generator

Create secure, random passwords with custom options

ジェネレーター
Generators

UUID Generator

Generate random UUIDs (v4) for your application

MAC Address Generator

Generate random MAC addresses for testing

ユーティリティ
Utilities

QR Code Scanner

Scan and decode QR codes from images

Barcode Generator

Generate various barcode formats (CODE128, CODE39, EAN, UPC)

HTML Entity Encoder/Decoder

Encode and decode HTML entities

Cron Generator

Generate cron expressions with syntax reference

Big Number Calculator

Calculate and format very large numbers

デザイン
Design

Color Picker

Pick, convert, and manage colors for your design

Color Palette Generator

Generate harmonious color palettes for your projects

テスト
Testing

Regex Tester

Test and debug regular expressions in real-time

XPath Tester

Test XPath expressions against XML/HTML documents

ネットワーク
Network

Subnet Calculator

Calculate network subnets and IP ranges

About Developer Tools

All tools run securely in your browser. No data is sent to any server. Your personal information and code never leave your device.

For requests or bug reports, please submit a GitHub issue.