Free CSRF Token Generator
Cross-Site Request Forgery tricks browsers into submitting forms the user never intended. The defense is a per-session token the attacker can't guess — and guessing requires real randomness. The CSRF Token Generator produces cryptographically secure hex tokens (16–64 bytes) for the synchronizer pattern, with an HTML snippet ready to paste into your forms.
How to Use the CSRF Token Generator
- Choose the token size — 32 bytes (64 hex chars) is the recommended default.
- Click Generate token.
- Copy the token into a hidden form field and the matching server-side session.
- On submit, compare the two values with a constant-time comparison.
Features
16–64 byte tokens; 256-bit default entropy; batch generation; HTML hidden-field snippet; copy buttons.
Benefits & Use Cases
Protect login, settings, and payment forms; generate tokens for framework-less apps; create test fixtures for security testing.
Tips
Bind the token to the user session server-side and validate with constant-time comparison. Rotate tokens on privilege changes, and prefer SameSite cookies as defense in depth.
Frequently Asked Questions
What is CSRF?
Cross-Site Request Forgery is an attack where a malicious site makes your browser submit requests to another site where you're logged in — like silently changing your email or transferring funds.
How does the token stop it?
The server embeds an unpredictable token in its own forms and requires it on submission. An attacker's site cannot read the token (same-origin policy), so forged requests fail validation.
How long should the token be?
32 bytes (256 bits) is the recommended default — far beyond guessing. Longer tokens add no practical security.
Do I still need SameSite cookies?
Yes, as defense in depth. Tokens are the primary CSRF defense; SameSite=Lax cookies block most forged requests even if token validation has a bug.
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