Email Validator
Validate email addresses with RFC 5322 compliance and disposable email detection
Email Input
Enter email addresses (one per line, or separated by commas/semicolons)
Examples
Click an example to load and validate
Common valid email formats
user@example.com john.doe@company.co.uk admin@mail.server.com
Plus signs, dots, and underscores
user+tag@example.com first-last@domain.com user_name@sub.domain.org
Numbers in local part
12345@example.com user123@domain.net support@42.com
Email Validation Rules
RFC 5322 Compliance:
- Valid characters in local part: letters, numbers, and special chars
- Domain must contain at least one dot
- Top-level domain must be at least 2 characters
- Quoted strings allowed in local part
- Comments and IP addresses in domain supported
Related tools
AES Encryption
Encrypt and decrypt text with AES-GCM and a passphrase, fully in your browser. Uses PBKDF2 key derivation and the Web Crypto API — your data and keys never leave your device.
Basic Auth Generator
Generate an HTTP Basic Authentication header from a username and password. Produces the Authorization header and ready-to-use curl and fetch snippets. Runs fully client-side.
Bcrypt Generator & Verifier
Hash passwords with bcrypt and verify hashes — choose your cost factor (rounds 4–15), get a secure hash instantly, and check whether a password matches a hash. Runs entirely in your browser.
CORS Header Validator
Validate Cross-Origin Resource Sharing headers for security compliance
CSP Builder
Visual Content Security Policy generator. Build secure CSP headers with an interactive UI, preview policies, and export for Nginx, Apache, and Next.js.
Hash Comparison Tool
Compare hash values and generate hashes from text for verification