dev-toolkit-support
Dev Toolkit
The Swiss Army knife for developers. Everyday utilities — fast, native, offline.
What’s Inside
Free Tools
| Tool | What it does |
|---|---|
| Cron Parser | Parse any cron expression and preview the next 5 scheduled runs in plain English |
| JWT Decoder | Decode JWT header, payload, and signature — expired tokens flagged automatically |
| Encoder / Decoder | Base64, URL-encode, and HTML-encode or decode any string |
| Hash Calculator | Generate MD5, SHA-1, SHA-256, and SHA-512 hashes |
| Timestamp Converter | Convert Unix epochs to readable dates and back, including seconds and milliseconds |
Pro Tools
| Tool | What it does |
|---|---|
| UUID Generator | Generate RFC 4122 v4 UUIDs in bulk with one-tap copy-all |
| JSON Formatter | Pretty-print, minify, and validate JSON with syntax error highlighting |
| Chmod Calculator | Convert between octal permissions like 755 and symbolic permissions like rwxr-xr-x |
| SQL Formatter | Clean up messy SQL with proper indentation and keyword capitalization |
| Diff Checker | Compare two blocks of text side-by-side or as a unified diff |
Screenshots
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Why Dev Toolkit
- Native SwiftUI — No web views, no wrappers. Built for iOS 17+ from the ground up.
- Offline-first — Every tool works without an internet connection. Your data never leaves your device.
- Adaptive layout — NavigationStack on iPhone, NavigationSplitView on iPad.
- One-tap copy — Every output has a copy button. Generate, copy, paste. Done.
- No accounts — No sign-up, no cloud sync, no tracking.
- Dark & light mode — Full appearance support.
- No subscriptions — Pro is a one-time purchase. Pay once, own it forever.
- Privacy-first — Zero analytics. No data collection. Nothing phones home.
Who It’s For
Developers, sysadmins, DevOps engineers, and anyone who reaches for an online tool to decode a JWT, check a cron schedule, or hash a string.
Dev Toolkit puts those utilities in your pocket — offline, instant, and without 15 browser tabs.