DevKnife is a collection of everyday utilities for developers, packed into one fast, native macOS app.
Instead of jumping between websites, browser tabs, and small scripts, DevKnife keeps the tools you use most in one place - running locally on your Mac for speed, privacy, and focus.
DevKnife covers many of the small but frequent tasks that come up during development — formatting and converting data, testing APIs, inspecting tokens, working with timestamps, generating test values, and handling common encoding or hashing tasks.
Each tool is designed to be quick to access, easy to use, and focused on doing one thing well.
Tools included:
Data
- JSON Editor & Formatter
- Converter (JSON, YAML, TOML, XML, CSV)
- Encoder & Decoder (BASE64, URL, HTML)
- JWT Decoder
- Time Inspector
Text tools
- Regex Tester
- Markdown Editor
- Text Compare
- Text Inspector
Generators
- Data Generator
- Password Generator
- Hasher (MD5, SHA1, SHA256, SHA512, CRC32)
Network tools
- HTTP Client
- IP Location
- Domain & IP WHOIS
- Network Speed Test
- IndexNow
Graphics tools
- Color Picker
- SVG Editor
- Tailwind Colors
Why DevKnife:
- Everything runs locally — your data never leaves your Mac
- Native macOS app built for performance and reliability
- Clean, focused UI designed for daily use
- One app instead of many tabs
DevKnife is built for developers who value speed, simplicity, and a distraction-free workflow.
This app hasn’t received enough ratings or reviews to display an overview.
Junk. Don’t waste your money
sf_flyboy
Whoever wrote this does NOT understand algorithms. Open a long JSON file and try to “close all children”. App locks up. Consistently. This isn’t a bug. This is a developer who does not know how to properly design code.
- Added a new App Bundle Inspector tool for examining macOS app bundles.
- Added optional Vim keybindings to code editors.
- Added synhronized scrolling between the Markdown editor and preview.
- Added YAML frontmatter highlighting to the Markdown editor and removed frontmatter from the preview.
- Added external file-change warnings with an option to reload the file.
- Added warnings before replacing documents with unsaved changes.
- Added protection against overwriting files modified outside DevKnife.
- Added file drop zones to Code Statistics, Hex Viewer, Base64 Image, and Ruler.
- Improved the look of code blocks in the Markdown preview.
Version 1.19.0
The developer, Solo Tuna, MB, 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.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
