Developer

Which developer tools are live?

• JWT Token DecryptDecrypt a compact JWE locally with Web Crypto.
• JSON FormatterPretty-print or minify JSON entirely in the browser.
• UUID GeneratorMint RFC 4122 UUIDs locally with Web Crypto.

Questions about developer tools

Do you send my tokens or keys to a server?

No. Decrypt and tidy steps use in-page JavaScript in this tab. There is no paste-bin, no account, and no key escrow. Tokens, keys, and JSON stay in memory until you clear the form or close the tab. We do not write them to localStorage and we do not upload them to Page Utils servers.

Is JWT Token Decrypt a jwt.io clone?

No. jwt.io is built around inspecting and verifying signed JWTs (JWS). The live tool on this hub decrypts compact JWE — five-part encrypted tokens — using the Web Crypto API. If you paste a three-part signed JWT it is rejected with an explanation, not silently treated as encrypted. Use jwt.io or a similar debugger for signatures.

Which algorithms does the JWE tool support today?

The playground reads alg and enc from the protected header. It supports dir with A128GCM or A256GCM, A256KW, and RSA-OAEP with a PKCS#8 PEM private key. Other JOSE algorithms are rejected with a clear error rather than guessed. Always match the key type to the header; a labelled FAKE example is on the page if you want to try the flow first.

Can I bookmark a country-specific developer URL?

There is one URL per tool, with a trailing slash, and no /in/ prefix. Use /developer/jwt-token-decrypt/, /developer/json-tidy/, and /developer/uuid-generator/ from India or anywhere else. We do not duplicate developer pages under a country path, because a second URL would split the canonical address search engines and people should share.

Does the UUID generator upload identifiers?

No. Version-4 UUIDs are minted with the Web Crypto API in this tab. Version-1 uses a timestamp and a random node, not a hardware MAC. Nothing is posted to Page Utils and nothing is written to localStorage. Close the tab to drop the list.