Best Encoders & Crypto Tools

Encode or decode text to/from Base64, UTF-8 safe.

Encode or decode strings using encodeURIComponent/encodeURI.

Encode or decode HTML entities in text.

Generate MD5, SHA-1/256/384/512 hashes of text.

Sign a message with HMAC using a secret key.

Decode a JWT's header and payload, and check expiry.

Encrypt or decrypt text with AES-GCM and a passphrase.

Generate cryptographically secure random strings.

Encode or decode text with ROT13 or any Caesar shift.

Hash text or a file and compare against an expected checksum.

Generate RSA or ECDSA key pairs and export them as PEM.

Compute SHA-1/256/384/512 digests of a local file.

Encode or decode text with the classic Vigenère cipher.

Encode or decode text using RFC 4648 Base32.

Generate and verify bcrypt password hashes with adjustable cost.

Build and sign a JWT with HS256/384/512 from a header, payload, and secret.

Generate a Subresource Integrity hash for scripts and stylesheets.

Build or decode an HTTP Basic Authorization header.

Convert certificates and keys between PEM and DER encoding.

Convert any file to a Base64 data URI, or decode Base64 back to a file.

Convert JSON Web Keys to PEM and PEM keys back to JWK.

Build the exact OpenSSL command for keys, CSRs and certificate checks.