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Free Online API Key Generator - ATools

Free online API key generator with multiple key formats, secure high-strength random generation, all processing completed locally in browser.

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Professional developer's essential free API key generation tool - ATools - Supports multiple API key format generation including JWT Token, Bearer Token, API Key, Secret Key, random strings etc. Secure high-strength random algorithms with custom length and character sets. Suitable for REST API, microservices, database keys, encryption keys and other scenarios. Real-time generation, batch generation, one-click copy. Completely local generation, no server dependency, 100% protects key security. Clean and intuitive interface, simple and efficient operation, is a professional tool for development team key management and security configuration. Completely free and open source, supports multiple common key formats, is the trusted security tool for global technical teams!

API Key Generator

Securely generate various types of API keys with support for custom formats and batch generation

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📋 Usage Instructions

Supported Secure Formats:

  • • API Key: Standard alphanumeric combination, suitable for REST API
  • • JWT Token: Includes header, payload, signature
  • • Bearer Token: OAuth 2.0 standard token format
  • • Secret Key: Base64 encoded, suitable for encryption purposes
  • • UUID: Unique identifier, 128-bit length
  • • Hex/Random: Hexadecimal/random string format

Security Features:

  • • Uses browser Crypto API to generate true random numbers
  • • Supports custom key length (8-128 characters)
  • • Can add custom prefix to identify usage
  • • Supports batch generation (up to 50)
  • • Multiple export formats (TXT/JSON/CSV)
  • • Completely local generation, no network transmission risk
⚠️ Security Reminder
Generated keys are only displayed in the current session. Please save them properly. Change keys regularly to improve security.