JWE Online Tool

This tool provides in-browser encoding and decoding of JSON Web Encryption (JWE) payloads, enabling developers, security engineers, and API testers to design, validate, and interoperability-test encrypted tokens without server-side tooling.

Conceptually, the tool follows the JOSE workflow: a header with alg and enc, generation of a content-encryption key, encryption of the key with the recipient public key (RSA-OAEP or RSA1_5), IV and ciphertext creation, and an authentication tag. It outputs both compact serialization and a full JSON structure for inspection.

Audience and differentiators: backend teams validating token handling, integration tests against different encryption algorithms, and security auditors who need deterministic results. Unlike single-use calculators, this tool maintains reproducible results and supports common AAD and ZIP compression to mirror real-world JWE usage.

Core features include: required inputs (payload, recipient public key, alg, enc) and optional settings (ZIP, aad); multi-output generation; error reporting on unsupported algs or invalid keys; and guidance via strict validation rules to prevent misconfigurations. Use cases include API client development, token format testing, and security verification of encryption interoperability.