Hash Generators & Crypto Tools

MD5, SHA-1/256/512, HMAC, bcrypt, AES, TOTP, UUID and password generators.

Convertto generates MD5, SHA-1, SHA-256, SHA-512, CRC32 and HMAC hashes, bcrypt password hashes, AES encryption, TOTP codes, UUIDs and secure passwords. Hashing uses the browser's native WebCrypto API where available, and no input ever leaves your device.

25 tools in this category

AES Text EncryptorEncrypt and decrypt text with AES-256-GCM and a passphrase, entirely in your browser.

Bcrypt Hash GeneratorHash a password with bcrypt at a configurable cost factor — the right way to store passwords.

X.509 Certificate DecoderDecode a PEM certificate to see its subject, issuer, validity, SANs and key details.

CRC32 Checksum CalculatorCalculate a CRC32 checksum — the fast error-detection code used in ZIP and PNG files.

File Hash & Checksum CalculatorCompute SHA-256, SHA-384, SHA-512 or SHA-1 for any file and verify it against a checksum.

HMAC GeneratorGenerate an HMAC signature with SHA-256, SHA-1, SHA-384 or SHA-512 and a secret key.

htpasswd GeneratorCreate Apache and Nginx basic-auth credentials with bcrypt, SHA-1 or MD5-crypt.

JWT SignerCreate a signed HS256, HS384 or HS512 JSON Web Token for testing, entirely in your browser.

JWT VerifierVerify a JWT's HS256 signature and its expiry, issuer and audience claims, entirely in your browser.

RSA & ECDSA Key Pair GeneratorGenerate an RSA or elliptic-curve key pair in your browser, exported as PEM or JWK.

MD5 Hash GeneratorGenerate an MD5 hash from any text — instantly and entirely in your browser.

Nano ID GeneratorGenerate compact URL-safe unique IDs — shorter than a UUID with comparable collision safety.

Passphrase GeneratorGenerate memorable Diceware-style passphrases from random words.

Password GeneratorGenerate strong random passwords using your browser's cryptographic random source.

Password Policy TesterTest a password against a policy and see whether the policy actually improves security.

Password Strength CheckerEstimate how long a password would take to crack, and see exactly what weakens it.

Random String GeneratorGenerate random strings from a chosen character set — for keys, tokens and test data.

SHA-1 Hash GeneratorGenerate a SHA-1 hash from text — 160-bit digest, computed locally.

SHA-256 Hash GeneratorGenerate a secure SHA-256 hash from any text, in hex and Base64.

SHA-384 Hash GeneratorGenerate a SHA-384 hash — a truncated SHA-512 used in TLS cipher suites.

SHA-512 Hash GeneratorGenerate a 512-bit SHA-512 hash — the widest digest in the SHA-2 family.

SSH Key Fingerprint CalculatorCompute the SHA-256 and MD5 fingerprints of an OpenSSH public key and read its details.

TOTP Code GeneratorGenerate time-based one-time passwords from a Base32 secret to test 2FA setups.

UUID v4 GeneratorGenerate random RFC 4122 version 4 UUIDs in bulk.

UUID v7 GeneratorGenerate time-sortable UUID version 7 identifiers — ideal as database primary keys.

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