DevKit: Developer Toolbox
JSON, JWT, Regex, Hash & More
Free · In‑App Purchases
Forty-two developer tools that work offline on iPhone, iPad and Mac. Paste anything and DevKit finds the right tool. No account, no network, nothing sent anywhere.
DevKit is the developer toolbox you already keep open in a browser tab, rebuilt as a native app for iPhone, iPad and Mac — and it works with the radio off.
Paste something and DevKit works out what it is. A JSON Web Token, a certificate, a cron line, a CIDR block, a colour, a hex digest: it recognises the shape and offers the right tool.
WHAT YOU GET FREE
• JSON Format — pretty-print, minify and validate, keeping your key order and number literals
• JWT Decode — header, claims and expiry, with optional HMAC verification
• Base64 — standard and URL-safe, padded or not
• URL Encode — query, form and path semantics
• Regex Tester — matches, capture groups, named groups, replace and split
• Hash — MD5, SHA-1, SHA-256, SHA-384, SHA-512
• UUID Generate — version 4 and time-ordered version 7, in bulk
• Unix Time — epoch seconds, milliseconds, microseconds and nanoseconds, any time zone
• Colour Convert — HEX, RGB, HSL, HSB, CMYK, with WCAG contrast ratios
• String Case — camel, snake, kebab, Pascal and eight more, all at once
• Number Base — binary, octal, decimal, hex and any base from 2 to 36, with a bit view
• Text Diff — line-by-line comparison with counts
WHAT PRO ADDS
All 42 tools, including YAML ↔ JSON, XML ↔ JSON, CSV ↔ JSON, HTML entities, string escaping for six languages, ULID and NanoID, HMAC, PBKDF2 calibration, a cron parser that tells you the next ten runs, JSONPath with jq-style pipes, a SQL formatter, native Markdown preview, an offline HTML preview, X.509 certificate decoding, RSA and EC key inspection, QR generation and scanning, lorem ipsum, text statistics, slugify, chmod, IP and CIDR maths, MIME lookup, HTTP status reference, Unicode inspection, seeded sample data, time-zone conversion, semver comparison, URL parsing, a query-string builder and a searchable git command reference.
Pro also unlocks unlimited history, iCloud sync of your favourites and history, Home Screen widgets, and the share extension.
BUILT FOR HOW YOU WORK
• Every tool is a Shortcuts action, so you can compose them into automations
• Send selected text straight to DevKit from any app, or from the Services menu on a Mac
• Search and keyboard shortcuts on iPad and Mac, and a menu bar popover on macOS
• Favourites, history and drafts that pick up where you left off
PRIVACY, PLAINLY
DevKit makes no network requests. It has no account, no analytics and no third-party SDKs. Everything you paste is processed on your device. History is stored locally, you can turn off saving previews, and you can erase everything from Settings. One purchase covers your iPhone, iPad and Mac.
TERMS AND PRIVACY
Terms of Use: https://devkit.eonix.lk/terms
Apple's standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://devkit.eonix.lk/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Eonix (Pvt) Ltd, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Eonix (Pvt) Ltd
- Size
- 7.2 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- DevKit Pro — Lifetime $24.99
- DevKit Pro — Monthly $1.99
- DevKit Pro — Yearly $12.99
- Copyright
- © 2026 Eonix