DevKit vs JWT Decoder & Token Inspector

Convert files and debug code in one app. DevKit turns PDFs into editable Word documents, photos into PDFs and HEIC photos into JPGs, and gives developers a full kit of formatters, decoders and generators. Everything runs on your iPhone or iPad: your files are never uploaded. FILE TOOLS > PDF to Word: Turn a PDF into an editable Word document (.docx), keeping headings, lists, links, images, headers and footers. Preview the result before you save it. Scanned pages are read with on-device text recognition. Tables are kept on iOS 26 and later. > JPG to PDF: Combine photos and scans into one tidy PDF > HEIC to JPG: Turn iPhone photos into JPGs for forms and websites > MOV to MP4: Turn .mov videos into .mp4 files > HTML Viewer: Open .html files safely and see their source > JSON, XML and CSV Viewers: Open data files as a tree or a table > Unzip and Zip Files: Open .zip archives, or bundle files into one > Open files straight from the Files app, Mail or Safari, and find everything you convert in the Files tab FORMATTERS > JSON Formatter: Format, minify and validate JSON, with a collapsible tree view > HTML, CSS, JavaScript, XML and SQL Formatters ENCODE & DECODE > JWT Debugger: Decode tokens, inspect headers and claims, verify signatures > Certificate Decoder: Read X.509 certificates > Base64, URL Encoder and Parser, HTML Encoder, Backslash Escape > Hash Generator: MD5, SHA-1, SHA-256 and SHA-512 CONVERTERS > Timestamp, Case Converter, Color Converter (HEX, RGB, HSL) > YAML to JSON, CSV to JSON, Number Base, Hex to Text > Cron Parser: Read cron expressions in plain English, with the next run times GENERATE & COMPARE > QR Code: Scan codes live with the camera or from a photo, and create your own > UUID and ULID Generator, Random String, Lorem Ipsum > Diff Checker, RegEx Tester, Markdown Previewer, Line Sort, String Inspector MADE FOR YOUR PHONE > History reopens your recent runs, stored only on your device > Paste, copy and share in one tap > Light and dark designs, large text and VoiceOver support > No account and no sign-up PRIVACY The tools process your text and files on your device. DevKit uses analytics to learn which tools are used (never what you put in them); you can turn it off in Profile > Privacy & Data. SUBSCRIPTION DevKit Pro unlocks every tool, as a monthly or yearly auto-renewing subscription. The price for your country is shown in the app before you buy. Eligible new subscribers get a free trial. Payment is charged to your Apple ID account when you confirm the purchase, or when the trial ends. The subscription renews automatically unless you cancel at least 24 hours before the end of the current period. Manage or cancel it in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://devkitpro.app/privacy

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