tools.dave.engineer
Discover a growing library of handy utilities made by Dave Hulbert. Lightweight, fast, and privacy-friendly by default. No accounts, tracking, or ads—just useful utilities.
Contribute ideas or code on GitHub and shape the toolkit.
View on GitHub- Privacy first
- Your data stays on your device.
- Open source
- Ideas welcome, issues encouraged, pull requests celebrated.
Explore the collection
Handy converters, debuggers, and tiny experiments ready for your next workflow.
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2D Size Comparator
Visualize and compare rectangular dimensions with overlays.
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3D Game of Life
Explore animated voxel life simulation
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Ambient Noise Profiler
Real-time ambient frequency visualizer
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Basic QR Code Generator
Generate QR codes from text
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Bible Verse Explorer
Browse NET Bible passages by book and chapter.
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Bubble Level
Simple digital bubble level
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Compass
Heading indicator with magnetometer data
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CSV ⇄ Markdown Table Converter
Convert tables between CSV and Markdown
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Device & Browser Info
Display current device and browser details
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GitHub Device Login
Start the GitHub device flow and store the resulting access token locally.
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JSON Formatter
Format and validate JSON data
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Local Storage Viewer
Inspect and manage browser localStorage
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Lux to ANSI Throw Converter
Estimate projector throw from lux readings
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Markdown to HTML Converter
Convert Markdown content into HTML
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Morse Code to Text
Tap or hold to transcribe Morse code into plain text
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Origin Private File System Viewer
Browse and manage Origin Private File System
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QR Code Reader
Upload QR code image and extract text/URL
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Running Pace Planner
Plan running pace, splits, and finish time
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Scratch Pad
Quick notes with local storage
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Speed Unit Converter
Convert speed units instantly
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WebGPU Fractal Explorer
Explore Mandelbrot fractals with real-time WebGPU rendering
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Word & Character Count
Count words and characters instantly