UD5 Toolkit
Binocular Astronomy Target Finder – Online Objects Tonight
Select aperture and see a list of deep-sky objects visible tonight with binoculars. Log what you saw.
Constellation Finder – Online Interactive Planisphere by Month
Clearly Visible
Partially Visible
Below Horizon
| Hover or click constellations
Constellation Finder
Hover over a constellation on the star chart
or click to lock your selection.
🔭 Best viewed around 9–10 PM local time
Solar System Scale Model - Online Visual Comparison
See planets and orbits at true scale (or logarithmic). Scroll from the Sun to Pluto. Understand space distances. Canvas.
Vocal Range Finder – Match Your Voice to Notes on Piano
Play notes on a virtual piano and sing along to find your lowest and highest comfortable pitch. Identifies your voice type (soprano, alto, tenor, bass).
Magnesium Food Finder – Search Foods High in Magnesium
Search a database of foods and sort by magnesium content per 100g or per serving. Learn which seeds, nuts, and greens boost your intake naturally.
Day of the Week Finder – What Day Was July 4, 1776?
Enter any past or future date and instantly learn the day of the week. Uses the Zeller’s congruence algorithm for accurate results.
Musical Scale Finder – Show Me a Scale on Piano
Choose a root note and scale type to see the scale notes highlighted on a piano keyboard. Covers major, natural minor, harmonic minor, and modes.
Reverse Chord Finder – Name That Chord from Notes
Input the notes you're playing and get all possible chord names, including inversions and slash chords. A lifesaver for songwriters and music theorists.
Diaper Size Finder – Weight & Brand Comparison
Quickly find the right diaper size based on your baby's weight. Compare sizing across major brands and see signs that it's time to move up to the next size.
Knitting Needle Gauge Finder – Online Digital Slider
Drag a virtual needle across a scale to measure its size in mm and corresponding US/UK/JP sizes.
Envelope Size Finder – Online Match Paper & Card
Enter the dimensions of your insert and get the correct envelope size (DL, C6, etc.). Quick mail guide.
Constellation Mythology Cards – Online Random Greek Story
Randomly displays a constellation with its art and the associated myth from Greek or other cultures.
Windshield Wiper Size Finder – Online by Vehicle
Look up front and rear wiper blade sizes by car model. Never buy the wrong length again.
Car Battery Group Size Finder – Online Year/Make/Model
Select your vehicle to get the correct BCI group size for a replacement battery. Quick reference.
Famous Book Quote Finder – Online Search by Keyword
Enter a keyword or author to find classic quotes from public domain works. Inspiration tool.
Ingredient Substitution Finder - Online What to Use Instead
Search for common ingredient substitutions (e.g., buttermilk, egg, cornstarch). Quick reference for when you're missing something. Local data.
Pet Name Finder - Online Suggestions by Breed & Personality
Get random pet name suggestions filtered by species, breed origin, and personality trait. Fun for new pet owners. Local generator.
Diaper Size Finder - Online Weight-Based Size Guide
Enter baby's weight in lbs or kg to see suggested diaper sizes across major brands. General reference, no data collected.
Broken Image Finder - Online Check Page for Missing Pictures
Enter a URL and get a list of all images that fail to load (404, CORS). A simple asset audit tool. Runs in your browser.
Next Prime Number Finder - Online Integer Sequence
Enter any integer and quickly find the next prime number after it. Perfect for hashing and puzzles.
Accessible Color Contrast Finder - Online WCAG 2.1 Helper
Given a background color, this tool suggests foreground colors that meet AA/AAA contrast ratios. Works for all vision types.
Chinese Zodiac Sign Finder - Online Year of the...
Enter your birth year and instantly see your Chinese zodiac animal and element. Fun cultural reference.
Piano Chord Finder - Online Visual Keyboard & Notes
Click a root key and chord type (Maj, min, 7th) to see the notes highlighted on a piano keyboard. Learn chords fast.
Constellation Sky Viewer - Online Star Map & Mythology
Click on a constellation to see its star pattern and read the Greek mythology behind it. Beautiful CSS illustration.
Acronym Finder - Online Decode Abbreviations & Slang
Look up common acronyms and abbreviations from a built-in list. Search by acronym or meaning. Always expanding, no internet needed.
Rhyme Finder - Online Dictionary of Rhyming Words
Enter a word and get a list of perfect and near rhymes. Categorized by syllable count. Useful for songwriting and poems. Static data, local.
JSON Path Finder - Online Search & Extract from Object
Search and extract values from a large JSON object using dot/bracket notation. Quickly locate deeply nested fields. Data stays local in your browser.