There are small tasks you reach for constantly while coding — checking JSON, encoding Base64, decoding a JWT, formatting SQL. DevKin eliminates the friction of opening a browser tab, finding a site, and typing it in.
DevKin is a native macOS app that bundles the developer tools you use most into one place. macOS 12 Monterey or later, Apple Silicon and Intel Mac supported.
- Instant access — All tools in one place. Open any tool immediately via the
devkin://deep link - Launcher compatible — Works with the Quick Link feature of third-party launchers like Raycast and Alfred
- UX — Handy shortcuts, clipboard auto-fill on deep link, instant conversion as you type, drag-and-drop, per-feature samples
Bug reports and feature suggestions are welcome at Issues. Direct contact: devkin.2605@gmail.com
| Feature | Description | Deep Link |
|---|---|---|
| Byte Converter | Enter a value in any unit and watch it convert across every unit instantly | devkin://byte |
| Length Converter | Enter a length in any unit and watch it convert across every unit instantly | devkin://length |
| Base Converter | Enter a value in one base and watch it convert to all other bases instantly. Custom base 2–36 supported | devkin://base |
| JSON Converter | Visualize JSON as a navigable tree. Text and key-path search, error location, Auto-fix | devkin://json |
| Base64 String Converter | Two-way conversion between plain text and Base64 strings | devkin://base64-string |
| Base64 Image Converter | Encode images to Base64 or decode Base64 back into an image. Drag-and-drop, live preview | devkin://base64-image |
| JWT Converter | Decode, verify, and sign JWT tokens. Supports HS/RS/ES/PS/EdDSA | devkin://jwt |
| SQL Formatter | Auto-format SQL queries. Keyword case, indent options, syntax highlighting | devkin://sql |
| Text Diff | Compare two texts line-by-side and word-by-word, highlighting additions, deletions, and changes | devkin://diff |
| Text Inspector | Character count, code points, words, lines, and byte size by encoding | devkin://text |
| Markdown Preview | Live Markdown rendering. GitHub-Flavored Markdown, copy as HTML | devkin://md |
| HTML Preview | Render HTML source instantly. Optional script execution (sandboxed) | devkin://html |
| QR Code Converter | Generate QR codes (URL/WiFi/vCard, etc.) or decode from an image. Export as PNG/SVG | devkin://qr |
| Regex Tester | Test regular expressions with live match visualization. 6 flags, capture groups, built-in cheatsheet | devkin://regex |
| Time Converter | Two-way conversion across Local, UTC, KST, and Unix time. Unit toggle (s/ms), custom format | devkin://time |
Deep links work from anywhere — terminal, Raycast, Alfred, browser address bar.
open devkin://json # Open JSON Converter directly from the terminalOpening a feature through a deep link auto-fills the input with whatever you copied to the clipboard. Clicking a feature directly in the sidebar does not auto-fill.
JSON
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Diff
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|---|---|
JWT
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Text Inspector
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brew trust lsh2613/devkin && brew install --cask lsh2613/devkin/devkinUpdate:
brew trust lsh2613/devkin && brew upgrade --cask devkin
brew trustis required once because DevKin ships from a third-party tap; Homebrew refuses to load casks from untrusted taps. Trusting it again on later runs is harmless.
Download the .dmg from GitHub Releases and drag it to /Applications.
macOS Gatekeeper notice
If you see "Apple cannot verify the developer" on first launch,
go to System Settings → Privacy & Security → Open Anyway.
| Shortcut | Action |
|---|---|
⌘ K |
Clear the current feature's input (when the Clear button is enabled) |
⌘ F |
Search and highlight text within the current feature's panes |
⌘ T |
Open a new tab (duplicates the active feature) |
⌘ W |
Close the active tab |
⌘ ⇧ [ / ⌘ ⇧ ] |
Switch to the previous / next tab |
⌘ 1 |
Expand / collapse the sidebar |
↑ / ↓ |
Move between items in the feature list; from the search box, step to the active feature |
Enter |
Open the selected feature / open the first search result |
Esc |
Move focus to the feature page / clear the search query |
Tab |
Cycle to the next element within the current area (sidebar or feature page) |
| Type any character | While in the feature list, typing focuses the search box and starts a new query |
- macOS 12 Monterey or later
- Apple Silicon and Intel Mac supported
Bug reports and feature suggestions are welcome at Issues.
Direct contact: devkin.2605@gmail.com