Encoders and decoders

rebuilds the PDF file from its Base64 representation, ready for direct download

converts a PDF to a Base64 / Data URI string, perfect for embedding a document directly inside HTML, JSON or an email

builds a signed JWT (HS256, HS384, HS512) from a JSON payload and an HMAC secret, ready for API testing or authentication tokens

decodes a JSON Web Token and shows its header and payload in a readable, structured form

verifies the signature of a JWT (HS256, HS384, HS512, RS256, RS384, RS512) using a secret or a public key, and inspects its claims

turns your data into a QR code