Format JSON, decode Base64, convert timestamps, debug JWT… with just one click! Native macOS app, work entirely offline

List of current tools:
- Unix Time Converter
- JSON Format/Validate
- Base64 Encode/Decode
- JWT Debugger
- RegExp Tester
- URL Encode/Decode
- Query String to JSON
- HTML Entity Encode/Decode
- Backslash Escape/Unescape
- UUID/ULID Generate/Decode
- HTML Preview
- Text Diff Checker
- Number Base Converter
- HTML Beautify/Minify
- CSS Beautify/Minify
- JS Beautify/Minify
- ERB Beautify/Minify
- LESS Beautify/Minify
- SCSS Beautify/Minify
- XML Beautify/Minify
- Lorem Ipsum Generator
- QR Code Reader/Generator
- String Inspector
- Hash Generator
- Markdown Preview
- ...more are coming!

◆ Work Offline

Stop pasting your JSON strings, JWT tokens, or any potentially sensitive data to random websites online. helps you quickly do your tiny tasks entirely offline! Everything you paste into the app never leaves your machine.

◆ Smart detection

DevUtils automatically selects the right tool based on your clipboard content. Activate the app anytime by:

- Copy text ► Press ⌃⌥⌘Space (Or your own customized hotkey, up to you)
- Copy text ► Click to the app icon in the status bar
- Select text ► Right-click ► "Inspect in" (This menu appears after you install the app)

All options are configurable in the Preferences panel!

◆ Feature rich

Many developer tools are supported, and more are coming. Scripting ability is coming soon so you can add your own tools/scripts.

Suggest your favorite tools by dropping me an email at or send your own PR via GitHub.

Terms of Service:

What’s New

Version 1.11.1

1.11.0 - 2021-08-20

◆ New features
- Markdown Preview is added, allow you to edit and preview GitHub Flavored Markdown. Yay!
- Added Instant Clipboard Replace feature, allow you to quickly replace your clipboard with processed string. Available in most tools with the "Lighting bolt" button.
- You can now customize the input labels in the Text Diff Checker tool.

◆ Improvements
- JWT Debugger now shows "Expiration Time" and "Issued At" timestamps in local time.
- JSON Formatter now detect Python/JavaScript object and convert them to JSON automatically.
- Added Nano ID and Object ID (MongoDB) to the UUID/ULID Generate/Decode tool.
- JSON to CSV tool now has an option to flatten the objects before convert to CSV.
- Added Wifi password and SMS template to the QR Code Generator.
- Added "Case sensitive" option and words filter to the String Inspector tool.
- The URL Encode/Decode tool now has an option to decode "+" characters to spaces.
- DevUtils now ask you to confirm to quit when you press Command+Q.
- Adjusted layouts and button sizes for some screens.
- For free trial users: you can now use a demo version of all the tools before purchasing a license (appear with a "Lock" icon).

◆ Fixes
- Fixed JWT Debugger state showing invalid after clicking the "Clear" button.
- Fixed an issue when loading UTF-8 text files.

1.11.1 - 2021-08-28

– Added "Demo" button for free trial users, clicking the button will prompt the In-app Purchase screen.

Ratings and Reviews

5.0 out of 5
7 Ratings

7 Ratings

DamianMehers ,

Constantly open

A fantastic tool which saves me from having to remember a myriad web sites, and pasting text into sites of dubious origin.

I have this tool constantly open and am using it all the time. Developer is friendly and open to suggestions.

If you are a developer you need this tool.

Calendee ,

Indispensable Tool for Developers

• Have untidy HTML, JSON, etc? Use DevUtils

• Need to validate a JWT? Use DevUtils

• Need to test a Regex? Use DevUtils

• Need to diff some text? Use DevUtils

• Need to ....? Use DevUtils

This app has everything a dev needs to do quick tasks to increase their productivity.

Even better, the developer is online, responsive, and open to suggestions.

I highly recommend this app. It's definitely worth the small price.

David_FOS ,

Use it Every Day

This colleciton of tools is so handy. I use it every day. It's so nice to know that the data is staying on my machine!

Highly recommended.

App Privacy

The developer, Dinh Quang Trung, 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 Linked to You

The following data may be collected but it is not linked to your identity:

  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.