Encode and decode Base64, with UTF-8 and URL-safe support

Convert files to Base64 and data URIs — nothing is uploaded

Percent-encode URLs, with separate modes for full URLs and parameter values

Escape and unescape HTML entities

Convert between text and hex with several separator styles

Escape and unescape Unicode in three notations

Compute SHA-1/256/384/512 and MD5 digests

Compute MD5 online and get the 32-character digest

Compute SHA-256 online, backed by Web Crypto

Generate HMAC signatures with SHA-1 through SHA-512

Generate bcrypt hashes and verify passwords against them

Inspect JWT header and payload claims and check expiry

Generate JWTs and verify HMAC signatures

AES encryption and decryption with PBKDF2 key derivation

Generate RSA key pairs in PEM format

Generate an HTTP Basic authentication header

Decode X.509 certificates to inspect validity and SANs

Assess password strength and get concrete improvements

Compute CRC32 checksums, matching zip and gzip

Translate between Morse code and text

ROT13 and Caesar cipher with an adjustable shift