No — everything runs locally in your browser. Great for sensitive tokens/secrets. 不會，全部在瀏覽器本機執行，敏感 token 也安心。
A grab-bag of utilities developers reach for daily: Base64 encode/decode, URL encode/decode, JWT decoding, UUID generation, Unix timestamp conversion and SHA-256 hashing — all in one fast page that runs locally.
Switching between half a dozen single-purpose sites wastes time and risks pasting secrets into untrusted pages. This toolbox keeps the common conversions together and processes everything in your browser.
Yes — decoding happens locally and tokens are never sent anywhere. Note that decoding only reads the payload; it does not verify the signature.
Yes — cryptographically random v4 UUIDs.
SHA-256 runs client-side and handles typical text inputs instantly.