Random Base64 String Generator — 32 Bytes, 44 Characters
Generate a cryptographically random 32-byte Base64-encoded string instantly — mock tokens and keys for development and testing. Free Base64 generator.
🔒 100% Client-Side Processing
Your data is processed entirely in your browser and never transmitted to any server.
Common Use Cases
Mock secrets in examples
Fill config samples and documentation with realistic-looking Base64 keys that were never real.
Parser test payloads
Generate valid Base64 of known byte length for decoder and validation tests.
Frequently Asked Questions
- What exactly is generated?
- 32 cryptographically random bytes (via the browser's crypto.getRandomValues(), not Math.random()) encoded to a 44-character Base64 string (with padding). Both the format and the entropy source match what you would get from key-generation commands like openssl rand -base64 32. Want plain hex instead of Base64? Use the Random Hex String Generator.
- What is a random Base64 string useful for?
- Placeholder session tokens, mock signing secrets in config file examples, test data for Base64 parsers, and realistic-looking credentials for documentation that must never contain real ones.
- How much entropy does the generated string carry?
- 256 bits. The generator draws 32 random bytes from crypto.getRandomValues, the browser's cryptographically secure source, then Base64-encodes them — so the strength is in the 32 bytes, not the 44 characters you see. That is comfortably beyond brute force for a session token or signing key.
- Is this safe to use as a production secret?
- The randomness is strong enough, but the handling is the weak point: a secret that has been displayed in a browser tab has been in your clipboard, possibly your shell history, and any sync service in between. For production, generate secrets on the machine that will use them and inject them through your secret manager.
- Why does the output end in an equals sign?
- That is Base64 padding. Encoding works in 3-byte groups, and 32 bytes leaves a remainder of 2, so a single = is appended to complete the final group. If the value must travel in a URL or filename, the Base64 URL-Safe Encoder produces a form without padding or + and / characters.
- Is my data private when I use this tool?
- Yes. This tool runs entirely in your browser using client-side JavaScript — nothing you type is transmitted to, logged by, or stored on any server. You can safely process confidential text, tokens, or code.