The encode/decode chores of integration work — Base64 for payloads and certificates, percent-encoding for URLs, and a JWT reader that shows you the claims and never asks for your signing secret. UTF-8 safe, which is more than most browser tools can say.
Encode text to Base64 — payloads, certificates, attachments.
Decode Base64 back to text, UTF-8 safe.
Percent-encode text for URLs and query strings.
Decode percent-encoded URL text back to readable form.
Read a JWT's header and claims — it never leaves your browser, and we never verify the signature.