Security
Hashes, HMAC, key pairs, JWTs and password checks.
30 tools available
AES Encryption
Encrypt or decrypt text with AES-256-GCM under a PBKDF2 passphrase.
Security
Basic Auth Generator
Build or read the Authorization header for HTTP Basic authentication.
Security
Bcrypt Generator
Hash a password with bcrypt, or check a password against an existing bcrypt hash.
Security
Checksum Calculator
Show the CRCs, the Adler-32 sum and the common digests of a piece of text.
Security
CORS Policy Builder
Turn an origin, method and header list into the Access-Control response headers.
Security
CORS Response Validator
Read a CORS header block and flag the combinations browsers refuse.
Security
Credit Card Validator
Check a card number's Luhn digit and report its brand and expected length.
Security
CSP Header Builder
Assemble a Content-Security-Policy header from individual directives.
Security
CSR Decoder
Read a PKCS#10 certificate request: subject, key, SANs and fingerprint.
Security
ECDSA key pair generator
Generate an ECDSA key pair on P-256, P-384 or P-521.
Security
Ed25519 key pair generator
Generate an Ed25519 signing key pair in PKCS#8 and OpenSSH formats.
Security
Email Address Validator
Validate an address against RFC 5322, check its IDN form and spot role mailboxes.
Security
EXIF Metadata Stripper
Remove the EXIF, XMP, IPTC and comment segments from a base64 JPEG.
Security
File Encryptor (AES)
Seal a file's contents into a downloadable AES-256-GCM blob, or open one again.
Security
Hash Comparison
Compare two lists of hashes and show what they share and what only one side has.
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Hash generator
Compute MD5, SHA-1, SHA-2, SHA-3 and BLAKE2 digests of any text.
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HMAC generator
Sign a message with a shared secret using HMAC-SHA-256, SHA-512, SHA-1 or MD5.
Security
JWT Decoder
Decode and inspect a JSON Web Token: header, payload, registered claims and expiry.
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JWT Signer
Sign a JSON payload as an HS256, HS384 or HS512 JSON Web Token.
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JWT Validator
Verify a JSON Web Token's signature and report its claims and expiry.
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Password generator
Generate strong random passwords with a configurable length and alphabet.
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Password strength checker
Estimate the entropy, the character pool and the crack time of a password.
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PEM Certificate Inspector
Read every certificate in a PEM bundle: subject, issuer, validity and fingerprints.
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RSA key pair generator
Generate a PKCS#8 RSA private key with its public key and OpenSSH form.
Security
security.txt Generator
Compose an RFC 9116 security.txt document ready for the .well-known directory.
Security
SQL Injection Detector
Scan Go code for string-built SQL and flag the patterns that invite injection.
Security
SSH Key Pair Generator
Generate an Ed25519, ECDSA or RSA key pair and print the OpenSSH public key.
Security
Text Encryptor
Encrypt and decrypt short text with AES-GCM, ChaCha20-Poly1305 or a plain XOR stream.
Security
Random Token Generator
Draw cryptographically random tokens as hex, base64url, base58, UUID v4 or ULID.
Security
TOTP Generator
Generate, parse and check time-based one-time passwords (RFC 6238).
Security