UUID Generator vs JWT Decoder & Token Inspector

PREMIUM — PURCHASE REQUIRED: All features described below are part of Pro and require a purchase: a weekly or yearly auto-renewing subscription, or a one-time lifetime purchase. You need a UUID right now — for a database seed, an API test, a config file — and you're on your phone. Tap once, and a fresh RFC 9562 UUID is on screen with a copy button beside it. No laptop, no website, no signal required. UuidGen generates every identifier on your device using the system's cryptographic random source. Pick v4 for the everyday random default, v7 when your IDs need to sort by creation time, v1 for classic timestamp-based IDs, or v5 to derive the same deterministic ID from a namespace and name every single time. The terminal-green, monospaced interface feels at home next to the rest of your toolchain. WHAT YOU GET • One tap and a fresh UUID is ready to copy — pasted into your code seconds later • A batch of 5, 10, or 50 unique IDs in a single tap when a seed script needs more than one • v5 namespace IDs (DNS, URL, OID, X.500) that come out identical every run — same input, same UUID • Format toggles for UPPERCASE, no-hyphen, and {braces} that re-render the current ID instantly • CSV or JSON export of your generated IDs, ready to drop into a repo, ticket, or test fixture • Your last 100 IDs kept on this device — searchable, one-tap copy per row or copy-all at once PERFECT FOR • Backend and mobile developers seeding databases or mocking API payloads • QA engineers who need unique test IDs mid-session without reaching for a laptop • DevOps and support staff filling in config values and correlation IDs on the go • Anyone learning how UUID versions differ — each version explains itself in one line WHY NOT JUST A WEBSITE? A web generator needs a connection, surrounds your IDs with ads, and you cannot see where its "random" actually comes from. UuidGen works in airplane mode, draws every random bit from your iPhone's secure random generator, and never sends a single ID anywhere. PRIVATE BY DEFAULT Everything happens on your device. No account, no network calls to generate, no analytics on your identifiers. Your history lives in local storage until you clear it. PREMIUM (PURCHASE REQUIRED) UuidGen is unlocked with one plan of your choice: a Weekly subscription, a Yearly subscription, or a one-time Lifetime purchase. Every plan opens the entire app — all UUID versions, batch generation, format toggles, history with search, and CSV/JSON export. Download UuidGen and put your first batch of UUIDs on the clipboard in the next thirty seconds. Terms of Use: https://leanstudio.asia/terms-of-use Privacy Policy: https://leanstudio.asia/privacy-policy Support: support@leanstudio.asia

Decode any JSON Web Token in a second — paste it in and JWTPeek splits it into a colour-coded header, payload and signature, pretty-printed and ready to copy. It is the fast, private way to read and inspect a JWT without pasting it into a random website. Most online JWT decoders make you send a sensitive bearer token to a server. JWTPeek does everything locally with Apple's CryptoKit — your token is decoded and verified right on your iPhone and never touches a server, a log or the network. WHAT YOU GET - A clean three-part breakdown of any token: header, payload and signature, each Base64URL-decoded and pretty-printed - Every claim laid out and labelled — issuer, subject, audience and your own custom claims - exp, nbf and iat shown as real human dates, with a live expiry countdown so you know instantly if a token is still valid - One-tap HMAC signature verification with HS256, HS384 or HS512 — enter your secret (plain or Base64) and see match or mismatch - Clear alg:none warnings so you never trust an unsigned token by mistake - A saved history of recently decoded tokens, on this device, so you can reopen any of them in a single tap PERFECT FOR - Backend and API developers debugging authentication and login flows - Engineers building with OAuth 2.0 and OpenID Connect - QA and security testers inspecting bearer tokens and claims - Anyone who needs to quickly check when a token expires WHY NOT JUST USE A WEBSITE? Because pasting a real access token into a browser tab sends it over the internet to a third party. A JWT is a bearer credential — whoever holds it can use it. JWTPeek keeps every token on your device, so you can inspect production tokens without leaking them. PRIVACY 100% on-device. Every token is decoded and verified locally with CryptoKit. Nothing is ever uploaded, logged, or sent to any server. There are no accounts and no tracking. FULL ACCESS JWTPeek Premium unlocks the full toolkit: on-device HMAC signature verification (HS256, HS384, HS512) and the complete security reference. Choose the plan that fits you: - Weekly - Yearly (best value) - Lifetime — pay once, yours forever Subscriptions auto-renew until cancelled; Lifetime is a single one-time purchase. Paste your first token and see it decoded in seconds. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? tphuc.work@gmail.com