Description
Doohickey’s Dev Tools puts a full suite of developer utilities right inside your WordPress admin. No more juggling browser tabs and bookmarking random websites — everything you need is one click away.
Free Tools
CSS Tools
* Gradient Generator — Linear and radial gradients with unlimited color stops
* Box Shadow Generator — Visual box-shadow builder with layered shadows
* Border Generator — Shorthand and per-side border controls
* Border Radius Generator — Per-corner radius with visual preview
* Clip-Path Maker — Polygon, circle, ellipse, and inset clip paths
* Flexbox Generator — Visual flexbox playground with container controls
* CSS Grid Generator — Set columns, rows, gaps, and alignment visually
Color Tools
* Color Picker — HSV color picker with HEX, RGB, and HSL output
* Contrast Checker — WCAG 2.1 AA/AAA compliance testing
* Color Converter — Convert between HEX, RGB, HSL, and CMYK
Code Tools
* String Utilities — Case conversion, reverse, slug, character/word count
* Encoder / Decoder — Base64, URL encoding, HTML entities, and more
Generators
* Placeholder Image — Custom-sized placeholder images for mockups
* Lorem Ipsum — Paragraphs, sentences, or words of filler text
* QR Code Generator — Instant QR codes from any text or URL
SEO & Meta
* Schema.org Generator — Structured data for Article, Local Business, and FAQ
* Meta Tag Generator — SEO meta tags, Open Graph, and Twitter Cards
Converters
* SVG to PNG — Client-side SVG conversion with scale options
* HTML to Markdown — Convert HTML markup to clean Markdown
* Markdown Preview — Live Markdown editor with rendered preview
* Aspect Ratio Calculator — Calculate ratios from dimensions, scale with locked ratios, common size presets
Pro Version
Upgrade to Doohickey’s Dev Tools Pro for additional tools and features:
- Palette Generator — Interactive color wheel with 7 harmony modes. Export as CSS or SCSS variables.
- Code Formatter — Auto-format JSON, HTML, CSS, JavaScript, and SQL
- Diff Checker — Side-by-side text comparison with highlighted differences
- HTML Table Generator — Visual table builder with CSV import
- Test Data Generator — Generate realistic fake data (names, emails, addresses, etc.)
- Flexbox — Per-item controls (flex-grow, flex-shrink, flex-basis, align-self, order)
- CSS Grid — Templates (Holy Grail, Dashboard, 12-Col, etc.), custom definitions, per-cell spans
- Placeholder Image — Social media presets and Data URI export
- Schema.org — 5 additional types (Product, Person, Organization, Event, Recipe)
- QR Code — Custom logo overlay
Why Doohickey’s Dev Tools?
- Zero external dependencies — Everything runs client-side in your browser
- No data leaves your site — Your code and content stay private
- Copy-ready output — One-click copy for all generated CSS, HTML, and code
- Consistent interface — Every tool follows the same clean, intuitive layout
- Lightweight — Single JavaScript bundle, loads only on the tools page
Source Code & Build Instructions
The full source code for this plugin, including uncompiled JavaScript and CSS, is available at:
https://github.com/mosaiclifecreative/doohickeys-dev-tools
To build from source:
- Clone the repository
- Run
npm installto install dependencies - Run
npm run buildto compile the production bundle - The compiled files are output to the
build/directory
The project uses @wordpress/scripts for building. Source files are in admin/js/ (JSX) and admin/css/ (CSS).
Screenshots

CSS Gradient Generator with full sidebar navigation 
Box Shadow Generator with visual preview and layered shadow controls 
Color Converter with HEX, RGB, HSL, HWB, and CMYK output 
Contrast Checker with WCAG 2.1 AA/AAA compliance results 
Border Radius Generator with shape presets and per-corner controls 
Schema.org Generator with Article structured data and JSON-LD output 
QR Code Generator with custom colors 
SVG to PNG Converter with file upload and code paste options
Installation
- Go to Plugins Add New in your WordPress admin
- Search for “Doohickey’s Dev Tools”
- Click Install Now, then Activate
- Navigate to Doohickey’s in your admin sidebar
- Start building!
FAQ
-
Does this plugin affect my site’s frontend?
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No. Doohickey’s Dev Tools only loads on its own admin page. It adds zero scripts, styles, or markup to your public-facing site.
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Do I need to be online for the tools to work?
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Most tools work entirely offline once the page is loaded. The QR Code generator and Placeholder Image generator use client-side rendering. No external API calls are made.
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What does the Pro version include?
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Pro unlocks 5 additional tools (Palette Generator, Code Formatter, Diff Checker, HTML Table Generator, Test Data Generator) plus advanced features in 5 more tools. The Pro version is available separately at mosaiclifecreative.com.
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Is my code/data sent anywhere?
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Never. All processing happens in your browser. Nothing is transmitted to external servers.
Reviews
There are no reviews for this plugin.
Contributors & Developers
“Doohickey's Dev Tools” is open source software. The following people have contributed to this plugin.
ContributorsTranslate “Doohickey's Dev Tools” into your language.
Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
1.0.4
- Fixed: plugin no longer deactivates itself after updating from 1.0.2
1.0.3
- Smooth upgrade path: free version auto-deactivates when Pro is installed
- Updated installation instructions
1.0.2
- Renamed plugin to Doohickey’s Dev Tools
- New slug: doohickeys-dev-tools
- Updated Freemius configuration for WordPress.org compliance
- Free tools are fully functional with no locked features
- Pro tools and features available separately via upgrade
1.0.1
- Renamed to “by Mosaic Life Creative”
- Default gradient fix
- Tested up to WordPress 6.9
1.0.0
- Initial release
- 21 free developer tools across 6 categories
- Modern React-powered interface
- Fully client-side — no external API calls
