About API Token & Bearer Key Generator
Create high-entropy API tokens, bearer keys, and access secrets with custom prefixes (e.g. sk_live_, tok_). Perfect for SaaS platforms, microservices, and webhook secrets.
Key Capabilities & Features
- Multiple encoding formats: Hex, Base64URL, and Alphanumeric
- Configurable entropy from 16 to 128 bytes (128 to 1024 bits)
- Customizable prefixing (e.g. sk_live_, key_, token_)
- Instant batch generation of 3 distinct tokens
- 1-Click copy to clipboard
How to Use API Token & Bearer Key Generator
Choose Format
Select Hex, Base64URL, or Alphanumeric format.
Set Length & Prefix
Specify byte entropy and optional API prefix.
Copy Token
Copy your cryptographically secure API token.
Privacy & In-Browser Execution Guarantee
Cryptographic tokens are synthesized in local browser memory via window.crypto. Zero network requests.
Frequently Asked Questions
Why use Base64URL format for API tokens?
Base64URL replaces '+' with '-' and '/' with '_', making tokens safe to use in HTTP query parameters, URLs, and authorization headers without encoding issues.
What prefix conventions should I follow for API keys?
Industry leaders like Stripe and OpenAI prefix keys (e.g. sk_live_, pk_test_, tok_) so automated secret scanning tools can detect leaks before exploitation.
How many bytes of entropy are recommended for API tokens?
At least 32 bytes (256 bits) of entropy is recommended to resist statistical analysis, collision attacks, and brute-force guessing.