UD5 Toolkit
Keyboard Shortcut Trainer – Online Learn VS Code / Figma Keys
Select a tool (VS Code, Figma, etc.) and get random shortcut prompts. Press the keys to practice.
VS Code Shortcuts Cheatsheet - Online Keyboard Shortcuts
VS Code Shortcuts Cheatsheet
Master Visual Studio Code with keyboard shortcuts for Windows, Mac & Linux
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Frequently Asked Questions
Yarn Substitution Tool – Online Match Gauge & Yardage
When a yarn is discontinued, find equivalent alternatives by matching weight and gauge. Local reference.
URL Status Code Checker - Online Bulk HTTP Response Tool
Check HTTP status codes for multiple URLs at once. Identify broken links and redirects. All requests made via browser fetch.
Compound Interest Calculator - Online Investment Growth Tool
Project how your savings and investments grow over time with compound interest. Interactive chart and detailed table. Free and anonymous.
Concrete Volume Calculator – Online Slab, Footing, Column
Calculate cubic yards or meters for various shapes (rectangular slab, circular column, trapezoidal footing). Local math tool.
Shoelace Length Calculator – Online Eyelet Pairs & Pattern
Enter number of eyelet pairs and lacing style to find the correct shoelace length in inches/cm. Never buy too short.
Resin Casting Volume Calculator – Online Mold & Part A/B
Enter mold dimensions or water weight to get total resin needed, including Part A and B.
Airflow CFM Calculator - Online HVAC Duct Sizing Tool
Calculate airflow in cubic feet per minute given velocity and duct diameter. Simple HVAC reference. Local only.
Concrete Mix Calculator - Online Cement Sand Gravel Ratio Tool
Calculate required bags of cement, sand, and gravel for a given concrete volume using standard mix ratios (1:2:4, etc.). Supports metric and imperial.
Simple Interest Calculator - Online Principal Rate Time Tool
Compute simple interest and final amount given principal, annual rate, and duration. Also reverse-calculates rate or time. Local only.
Soda Ash Soak Calculator – Online Tie‑Dye Prep Ratio
Calculate water and soda ash needed to pre‑soak fabric for tie‑dye. Achieve vibrant, long‑lasting colors.
Iron Absorption Optimizer – Online Timing & Food Pairing
Schedule your iron supplement away from inhibitors (coffee, calcium). Visual reminder and log.
Liquid Fertilizer Dilution Calculator – Online Mix Ratio
Calculate how much liquid fertilizer concentrate to add per gallon of water based on desired N concentration.
Sudoku Solver Step-by-Step - Online Visual Deduction
Enter a Sudoku puzzle and watch it solved step-by-step with techniques explained. Learn solving strategies. Local only.
CAGR Calculator - Online Compound Annual Growth Rate
Find the CAGR of an investment given start and end values over a time period. Instant growth rate.
Spring Constant & Elastic Energy Calculator – Online Hooke's Law
Enter spring constant and displacement to find force and stored energy. Visual compression.
Elephant Toothpaste Demo Calculator - Online Reaction Ratios
Find safe mixing ratios for the classic elephant toothpaste demonstration. Volume adjustments for different container sizes.
Chicken Feed Ration Calculator – Online Layer, Broiler, Chick
Mix your own feed by entering grain percentages and see the resulting crude protein. Formulate a balanced diet for your flock.
Interval Timer - Online HIIT & Tabata Workout Clock
Set up high-intensity interval training rounds with work and rest periods. Audio alerts and customizable sets. Runs in background, no download.
Tap to Morse Code Keyboard – Online Touch & Decode
Tap short/long on the screen to create Morse characters, and see the decoded text appear.
Redirect Path Tracer - Online SEO Redirect Chain Analyzer
Enter a URL and trace the full redirect chain, seeing each hop's status code and location. Identify unnecessary redirects. Client-side fetch.
Simple Audio Waveform Cutter - Online Trim & Loop
Load an audio file and visually trim it by dragging handles on the waveform. Export the trimmed clip. All local.
HTTP Headers Checker - Online Inspect URL Response Headers
Enter a URL and see the full HTTP response headers returned by the server. Detect redirects and server type. Useful for SEO and web debugging.
Number Input Step Demo - Online See Validation Behavior
Test min, max, and step constraints on `<input type='number'>`. See how invalid values are handled. Undocumented behavior.
USB Pinout Reference - Online Connector Wiring Guide
Reference diagrams for USB‑A, USB‑C, micro‑USB pinouts. See wire colors and signal descriptions. Hardware hacking helper.
Beef Jerky Dehydration Timer – Online Thickness & Time Guide
Calculate dehydrating time based on meat slice thickness and desired texture. Countdown timer with reminders.
Herb Drying Time Guide – Online Hanging vs Dehydrator
Select herb and method to see estimated drying time. Set a reminder to check. Preserve flavor.
Crochet Hook Size Converter – Online US, UK, Metric, JP
Enter a hook size in any system and instantly see the equivalent in all other standards.
Meeting Agenda Timer – Online Stay on Topic with Countdown
Create a simple agenda with timeboxes for each topic. Visual countdown and alerts for each.
IQR Calculator - Online Interquartile Range & Box Plot
Enter a dataset to compute Q1, median, Q3, IQR, and highlight outliers. Visual box plot generated in canvas.