Generador de Claves Secretas y Contraseñas
Cryptographically random API keys, UUIDs, hex and base64 secrets - generated in your browser, never sent anywhere
100% gratis. Funciona completamente en tu navegador: tus archivos y datos nunca salen de tu dispositivo y no se sube nada a ningún servidor.
URL-safe alphanumeric - the shape used by Stripe, GitHub and most REST APIs.
Generated with crypto.getRandomValues() in your browser - nothing is sent to a server, and nothing is stored.
Acerca de esta herramienta
Generate cryptographically random secrets in the format your project actually needs - API-style keys, UUID v4 values, hex strings, base64 strings, or strong passwords - using your browser's crypto.getRandomValues() so nothing is ever sent to a server. Add an optional prefix, generate a batch at once, and copy or download the results as a .txt file.
Cómo usar esta herramienta
- Pick a formatChoose API Key, UUID v4, Hex, Base64, or Password depending on what you need to generate.
- Set length and prefixAdjust the character length (where applicable) and optionally add a fixed prefix like `sk_live_`.
- Choose how many to generateGenerate a single secret or a batch of up to a few hundred at once.
- Copy or downloadClick any row to copy it instantly, copy the whole batch, or download everything as a .txt file.
Por qué usarla
- Uses the browser's built-in cryptographically secure random number generator, not Math.random().
- Covers the five secret formats developers reach for most: API keys, UUIDs, hex, base64, and passwords.
- Optional prefix support makes keys look like real API tokens for seeding test data.
- Batch generation with one-click copy and a .txt download for seeding env files or test fixtures.
Usos comunes
- Generating placeholder API keys for local development or demo environments.
- Creating UUIDs for database seed data or mock records.
- Generating hex or base64 secrets for signing keys, encryption tests, or session tokens.
- Producing a batch of strong passwords for test accounts.
Consejos para mejores resultados
- Never reuse a generated development secret as a real production credential - always issue fresh production keys through your actual provider.
- Use the prefix field to mimic your real key format (e.g. `sk_test_`) so test data behaves like production data in your code.
- For encryption or signing keys, prefer Hex or Base64 format at a longer length rather than the API Key format.
- Download as .txt when seeding multiple environment variables at once to avoid retyping values.
Errores a evitar
- Using a short length for a value meant to be a real security secret.
- Assuming UUID v4 values are cryptographically unpredictable enough to double as auth secrets - use Hex or Base64 for that instead.
- Committing generated secrets to source control, even placeholder ones, out of habit.
- Forgetting that a prefix counts toward the visible string but not the random portion's length.
Preguntas frecuentes
They are generated with crypto.getRandomValues(), the Web Crypto API's cryptographically secure random source, the same primitive used to generate real API keys and tokens - not Math.random(), which is not safe for security-sensitive values.
You can, since the randomness itself is secure, but most real API keys need to be registered with the service that will authenticate them - generating a random string here doesn't create a working key in some other system, it just gives you a securely random value.
API Key and Password use a mixed alphanumeric (plus symbols for Password) charset at a length you choose; UUID v4 is a fixed-format 36-character identifier; Hex and Base64 encode raw random bytes in those two standard encodings, commonly used for signing keys and tokens.
Yes. Secret Key & Password Generator is free for normal use with no account required, and ToolBox does not add a watermark to your result.
No. Every secret is generated entirely in your browser using the Web Crypto API - nothing is sent to a server, ever.
No install needed. Open Secret Key & Password Generator in your browser, pick a format, then copy or download the result.
Yes on modern mobile browsers. For large files, a desktop browser is usually faster and more reliable.
Double-check the selected format matches what you need (for example Hex vs Base64), and confirm the length is within the allowed range for that format.
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