Why is this more secure than Math.random()?

Math.random() is a pseudo-random number generator not designed for cryptographic use. The Web Crypto API (window.crypto.getRandomValues) uses the operating system's entropy source, making the output suitable for security-sensitive purposes.

Are generated tokens sent to any server?

No. All token generation happens entirely in your browser using the Web Crypto API. Nothing is transmitted over the network.

Which format should I use?

Use hex for maximum compatibility. Use URL-safe Base64 when you need a compact token safe to include in URLs or HTTP headers without percent-encoding. Standard Base64 may contain +, /, and = characters that need escaping in URLs.

How many bits of entropy does each byte length give me?

Each byte provides 8 bits of entropy. 16 bytes = 128 bits, 32 bytes = 256 bits. For most security tokens (API keys, session IDs) 16–32 bytes (128–256 bits) is recommended.

Can I generate multiple tokens at once?

Yes — use the "Batch" mode to generate up to 20 tokens at once. Each one is independently generated and cryptographically secure.

Secure Token Generator

Name: Secure Token Generator
Availability: InStock
Author: Nham Vu

Generate cryptographically secure random tokens in hex, Base64, or URL-safe Base64 with your choice of byte length.

Token Settings

Byte Length (determines token strength)

32 bytes

Output Format

Hex

Lowercase hexadecimal — universally compatible

Base64

Standard Base64 with +, /, = characters

URL-safe Base64

Replaces +/= with -/_ — safe in URLs and headers

Batch Count 1

1 token 20 tokens

Generated Token

Configure settings and click "Generate Token"

About This Tool

All tokens are generated using window.crypto.getRandomValues(), the Web Crypto API standard supported in all modern browsers. No data leaves your device.

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Summary

Generate cryptographically secure random tokens in hex, Base64, or URL-safe Base64 with your choice of byte length.

How it works

Select the number of random bytes you want (8–256 bytes).
Choose an output format: hex, Base64, or URL-safe Base64.
Click "Generate" to produce a new token via the browser's Web Crypto API.
The token appears in the output field — click "Copy" to copy it to your clipboard.
Click "Generate" again any time to produce a fresh token.

Use cases

Generate API keys and secret tokens for web services.
Create secure session identifiers for authentication systems.
Produce CSRF tokens to protect web forms.
Generate random secrets for OAuth2 flows.
Create nonces for cryptographic protocols.
Produce secure password reset tokens.
Generate unique identifiers for webhooks or callbacks.
Create invite codes or one-time access links.

Frequently Asked Questions

Last updated: 2026-06-09 · Reviewed by Nham Vu