API Key Generator
Generate cryptographically secure API keys with industry-standard prefixes. Configurable length, entropy display, and time-to-crack estimates. 100% client-side.
DID YOU KNOW?
Stripe prefixes all live keys with 'sk_live_' and test keys with 'sk_test_'. GitHub tokens start with 'ghp_' and are automatically scanned in public repos — if you push one, GitHub revokes it within seconds. Prefixes make leaked keys instantly identifiable.
API key security for developers
What makes a good API key
A strong API key is long (32+ characters), uses a large character set (alphanumeric = 62 chars), and is generated from a cryptographically secure source. Prefixes like 'sk_live_' help identify the service and environment. The key itself should be random — no patterns, no timestamps, no user IDs embedded. This generator uses Web Crypto API to ensure maximum entropy.
API keys vs passwords vs tokens
API keys authenticate applications, not humans. They're typically longer than passwords (32-128 chars), alphanumeric, and not meant to be memorized. Unlike passwords, API keys are stored in environment variables or vaults and accessed programmatically. JWTs are signed tokens that carry claims and expire. Encryption keys are fixed-size binary values for AES or similar algorithms. Each has different generation and storage requirements.
How API keys get leaked
The #1 cause of API key leaks is accidental git commits. Developers paste keys into .env files, forget to .gitignore them, and push to GitHub. GitGuardian reports over 10 million secrets exposed in public repos in 2023 alone. Other common vectors: hardcoded keys in frontend code, shared in Slack messages, or left in CI/CD logs. Use a vault to store keys and inject them at runtime — never commit them to source control.
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API key generator FAQ
At least 32 characters using alphanumeric characters (62 possible values per character). This gives 190+ bits of entropy, making brute-force attacks computationally infeasible. Many services use 40-64 character keys. Longer is generally better — there's no usability cost since keys are never typed manually.
Prefixes serve multiple purposes: they identify the service (sk = Stripe, ghp = GitHub), the environment (live vs test), and the key type (secret vs publishable). Prefixes also enable automated scanning — GitHub, GitGuardian, and other tools can instantly detect leaked keys based on their prefix pattern.
Best practice is to rotate keys every 90 days for production systems. Immediately rotate if you suspect a leak. Use a secrets manager like SecureCodeHQ that supports key rotation with grace periods, so your services don't experience downtime during rotation.
Environment variables are better than hardcoding, but they're still stored in plaintext on disk (in .env files) or in your shell history. For production, use a secrets vault that encrypts values and provides audit trails. SecureCodeHQ can inject secrets into process.env at runtime without .env files.
SecureCodeHQ provides an MCP server that Claude Code can use to read your API keys securely. The values are injected into temporary files that Claude references by path — they never appear in the AI conversation. Every access is logged with the AI model identifier, timestamp, and IP address.
Generated an API key? Don't leave it in a .env file.
SecureCodeHQ encrypts your API keys and lets Claude Code access them via MCP. Full audit trail, access rules, and team sharing.