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CodeTools

Free Online Developer Tools

42 developer tools that run entirely in your browser. No data uploads, no signup required.

Browse All Tools →
✅ 42 tools · Client-side only · 42+ free tools for developers · No server upload

All Tools

Payment & Finance

🔔
Payment Webhook Simulator
📈
Acquiring Margin Calculator
✓
Signature Verification
📡
Webhook Receiver
🐛
Payment API Debugger

Encoding & Hashing

🔐
Base64 Encode / Decode
📁
Base64 File Converter
🔑
Hash Generator
🔏
HMAC Signature Generator
🔗
URL Encode / Decode
🌐
HTML Entities
🔐
JWT Decoder
🔒
Bcrypt Hash & Verify
🔐
AES Encryption

Formatters

📋
JSON Formatter
🗄
SQL Formatter
📋
XML Formatter
🔍
JSON Diff
🔍
Text Diff
📊
Word Counter
🎨
Color Converter
🔍
Regex Tester
🔎
JSONPath Tester

Converters

📊
JSON ↔ CSV
📝
JSON ↔ YAML
Aa
Case Converter
⏰
Timestamp Converter
💱
Currency Converter
🔧
JSON to Code
🖥
User-Agent Parser
🌐
IP Address Tools

Generators

🆔
UUID Generator
🔑
Password Generator
〰️
QR Code Generator
🔐
RSA Key Pair Generator
⏰
Cron Expression Generator
📝
Markdown Preview
🆔
ULID Generator
📝
Lorem Ipsum Generator

Network & Reference

🔌
frp Tunnel Config Generator
🌐
HTTP Status Codes
🔢
Chmod Calculator

Why CodeTools?

🔒

100% Private

All tools run in your browser. Nothing is sent to any server. Your data stays yours.

🌐

English & Chinese

Full Chinese/English support. Toggle with one click in the top-right corner.

⚡

No Signup

Open and use. No accounts, no limits. Built for developers.

Get Started

Pick a tool and start using it instantly. All free, no signup needed.

Browse All Tools →
CodeTools — Free online developer tools