Random Salt Generator Online – Secure Salts and Tokens in Hex and Base64

A salt is a random value added to data before hashing, so identical inputs produce different hashes. Developers also need random strings for API keys, session secrets, CSRF tokens and encryption keys. This free random salt generator creates them with your browser's cryptographically secure random number generator, not a predictable formula.

I checked that all three outputs encode exactly the same bytes, so you can safely switch between hex and Base64 in your code. Because generation happens locally, the secrets you create are never seen by anyone else.

Random Salt Generator Online Features

How to Use the Random Salt Generator Online

Step 1: Choose the salt length in bytes

Drag the String Length slider to choose how many random bytes to generate. 16 bytes (128 bits) is enough for password salts, while 32 bytes (256 bits) is a strong default for API keys, secrets and encryption keys.

Step 2: Generate new salts in three formats

Press Generate New Salts. The same random bytes are shown as Hexadecimal (Base16), Base64 (Standard) and Base64 (URL-Safe / No Padding), with the character count of each.

Step 3: Copy the format you need

Press Copy next to the format your code or config expects. Use hex for databases and logs, standard Base64 for most libraries and URL-safe Base64 for tokens that go in URLs, cookies or environment variables.

What Salts and Tokens Are Used For

• Password hashing: a unique salt per user stops rainbow-table attacks.
• API keys and secrets: long random strings that are impossible to guess.
• Session and CSRF tokens: random values that tie requests to a real session.
• Encryption keys and IVs: random bytes for AES and other ciphers.
• JWT signing secrets: high-entropy secrets for HMAC-signed tokens.

Random Salt Generator Tips

• Generate a new, unique salt for every password, never reuse one salt for all users.
• Store salts alongside the hash; they do not need to be secret, only unique.
• Keep API keys and signing secrets private and rotate them if they leak.
• Modern password libraries like bcrypt and Argon2 create salts automatically; use this tool for other secrets or custom schemes.
• Prefer 32 bytes or more for anything that protects access.

How Many Bytes Do You Need?

Security is measured in bits: each byte adds 8 bits of randomness. 16 bytes gives 128 bits, which is already far beyond brute force. 32 bytes gives 256 bits and matches the key size of AES-256. Going above 64 bytes rarely adds practical security, but the random salt generator allows up to 128 bytes for systems that require long secrets.

Frequently Asked Questions