UD5 Toolkit
Screen Recorder - Online Record Browser Tab & Download WebM
Record your screen, application window, or browser tab directly using the Screen Capture API. Download as WebM. All local.
All Tools
999+ toolsDNS Lookup - Online Domain Records Checker (A, MX, CNAME)
Query DNS records for any domain directly from your browser using DNS-over-HTTPS. See A, AAAA, MX, CNAME, and TXT records. No logs.
Emoji Lookup - Online Search & Copy All Emojis
Search the complete emoji set by keyword or code. Click to copy. Includes skin tones and flags. Always up to date with Unicode.
Tiny House Cost Estimator – Online DIY Build Budget Tool
Breakdown of expected costs (materials, appliances, etc.) for a tiny house. Adjust percentages or enter custom. Local calculation.
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.
Text to Emoji Cipher - Online Encode Secret Messages
Convert your text into a string of emojis using a simple substitution cipher. Share secret messages that look fun. Decode them with the same tool. All local.
Random Song Lyric Generator - Online Fake Music Line Creator
Generate a random, somewhat meaningful song lyric line. Write your own hit with AI‑free randomness. All local.
D&D Magic Item Price Calculator – Online by Rarity & Edition
Select item rarity and consumable state to get a price range based on Dungeon Master's Guide tables. Quick reference.
TV Viewing Distance Calculator - Online Size vs Resolution Guide
Find the optimal TV size for your room or the best viewing distance based on screen size and resolution (1080p, 4K, 8K). Simple THX/SMPTE reference.
Week Number & Start/End Dates - Online ISO 8601
Enter any date and get its ISO week number, plus the start and end dates of that week. Quick reference.
Cash Stack Visualizer – Online See How Much $1 Billion Looks Like
Enter an amount and see a virtual stack of $100 bills with height comparison to everyday objects.
Marine VHF Channel Guide – Online Quick Reference by Region
Select region (US, Canada, International) and see channel frequencies and usage (distress, bridge). Boating safety.
Roof Snow Load Estimator – Online Ground Snow & Pitch Factor
Enter ground snow load and roof pitch to estimate the effective snow load on a sloped roof. Quick structural check for snowy regions.
Scale of the Universe - Online Zoom from Planck to Galaxy
Zoom through sizes from the Planck length to the observable universe. Educational and awe‑inspiring visualization.
Relative Luminance Calculator - Online WCAG Metrics
Enter a hex color and get its relative luminance per WCAG definition. Understand why this matters for contrast.
Speaker Placement Calculator - Online Home Theater Stereo Angle
Calculate ideal stereo speaker placement (toe-in, distance from wall) for best soundstage. Visual diagram. For audiophiles. Local tool.
Default Wi‑Fi Password Calculator - Online ISP Router Keygen
Enter a router's MAC address or serial and generate the common default WPA passphrase for major ISP brands. Educational purpose only.
Simple Haversine Distance Calculator – Online City‑to‑City
Enter two city names or coordinates and get the straight‑line distance in miles/km. Local calculation.
Beaufort Wind Scale Visualizer – Online Speed & Sea State
Drag a slider to see wind speed in knots/mph/kmh and the corresponding sea conditions and land effects.
Query Parameter Extractor - Online URL Param Table Viewer
Enter a full URL and get all query parameters in a clean table with decoded values. Quickly see UTM and tracking params.
Magic Square Generator - Online Create n x n Constant Sum Grid
Generate magic squares of odd order (3x3, 5x5, …). See the sum constant and verify rows, columns, diagonals. Educational math toy.
Lyrics Finder - Online Song Lyrics Search Tool
Enter a song title and artist to find lyrics using public APIs. Quick preview and copy. A lightweight tool for music lovers.
npm Version Range Checker - Online SemVer & Tilde Caret
Enter a package name and version range to see all satisfying versions from the registry. Understand ^ and ~.
LEGO Color Chart & Hex Reference – Online BrickLink Colors
Browse all official LEGO colors with names, years, and hex codes. Sort by hue. Perfect for builders.
Emoji Cipher Decoder - Online Secret Message Fun
Decode a message hidden in a string of emojis (each emoji maps to a letter). Fun game for kids. Create your own.
Print Readability Calculator – Online Minimum Font for Distance
Enter viewing distance to get the minimum readable print font size. Design posters and signs.
Blood Alcohol Content Estimator - Online BAC Calculator
Estimate BAC based on gender, weight, drinks consumed, and time. Uses Widmark formula. Educational tool, never encourage drunk driving. Local only.
Image to Binary Array - Online Pixel Dump
Convert any image into a raw binary array of RGBA values. For use in embedded systems or game development. Copy as Uint8Array.
Lenticular Print Generator - Online Interlace Two Photos
Interlace two images into a striped pattern for lenticular lens printing. Preview with simulated tilt. DIY fun.
Bruise Color Timeline – Online Reference Healing Stages
Visual chart showing the typical colors a bruise goes through from red to yellow. Educational only.
Eye Dominance Test - Online Find Your Dominant Eye
Simple interactive eye dominance test: hold up a virtual dot and see which eye stays aligned. Educational.
Color Name Finder - Online Hex to Name Dictionary
Find the official name of any hex color from the extended color dictionary. Search by name to get the hex code. Handy for CSS and design language.
Knot Strength Efficiency Guide – Online Visual Weakness Chart
Compare common knots by their efficiency percentage and residual strength. Interactive chart with animated diagrams.
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.
CSS Compatibility Linter - Online Check Browser Support
Paste your CSS and see warnings for properties that have limited browser support. Links to CanIUse. Modernize safely.
API Status Checker - Online Test Endpoint & Response
Enter an API URL and quickly check its HTTP status code and response time. See response headers and body. Browser fetch.
Tangram Puzzle - Online Drag & Match Shapes
Drag the seven tangram pieces to form a target silhouette. Multiple puzzles. Develop spatial thinking. All canvas interactions.
Online Scratch Card - Virtual Reveal & Surprise Message
Create a virtual scratch card with a hidden message or prize. Send the link; recipient scratchs with mouse/touch. Canvas-based.
Shadcn/UI Theme Builder - Online Custom CSS Variables
Pick colors for the shadcn/ui design system and generate the complete CSS variable theme file. Copy into your project.
Pi Digits Viewer - Online Scrolling Infinite π
Scroll through thousands of pre‑computed digits of π. Search for a specific string of digits. For math lovers.
Password Pwned? Checker - Online k‑Anonymity
Check if a password appears in the Have I Been Pwned database using k‑Anonymity. Only the first 5 characters of the hash are sent.
Fancy Title Generator - Online Royal & Noble Names
Generate a grand, aristocratic title like 'Duke of Waffleshire'. Perfect for silly fun or RPG characters. Local.
Planetary Fact Sheet - Online Solar System Stats
Click a planet to see mass, diameter, moons, temperature, and distance from sun. Beautifully styled static data.
Lug Nut Torque Spec Finder – Online by Vehicle Make
Look up manufacturer torque specs for lug nuts. Avoid warped rotors. Printable chart.
Tab Counter & Memory Estimator - Online Window Stats
See how many tabs you have open and estimate memory usage based on navigator object. Fun productivity check.
Number to Words Converter - Online Write Out Currency
Convert a numeric amount into English words, perfect for writing checks or legal documents. Supports USD/GBP styles.
Browser Storage Quota Estimator - Online Check Limit
Estimate how many MB/GB your storage can hold based on navigator.storage.estimate() and display as a pie chart.
Color Image to ASCII Art - Online True Color Converter
Convert any image into colored ASCII art using divs with background colors. Creates a stunning text‑based replica. View & copy HTML.
Random Animal Soundboard - Online Hear Real Calls
Click buttons to play real animal sounds: lion roar, bird tweet, dolphin click. Studio recorded. No load.
Alphabet of Elements - Online A‑Z by Chemistry Symbol
See all elements sorted alphabetically by symbol. Picture and atomic weight. Beautifully styled static list.
CSS Progress Bar Generator - Online Animated & Styled
Create a custom HTML/CSS progress bar with percentage, colors, and animation. Copy the code. Modern UI element.
Exoplanet Name Generator - Online Alien World Catalog
Generate a realistic‑sounding exoplanet designation (e.g., Kepler‑442b) and a sci‑fi planet description. For worldbuilding.
Excuse Generator - Online Funny & Creative Reasons
One click to get a hilarious excuse for being late, missing homework, or not doing chores. Pure comedy.
ASCII Table - Online Character Code Reference
Interactive ASCII table showing decimal, hex, octal, and binary codes for all standard and extended ASCII characters. A classic programmer reference.
Mortgage Calculator - Online Home Loan & Amortization Tool
Estimate monthly mortgage payments with amortization schedule. Input loan amount, interest rate, and term. All calculations performed securely on your device.
What Font is Used on a Website - Online Detector
Enter a URL and extract the font stacks and web font URLs used on that page. Quick typography research.
ASL Fingerspelling Practice - Online Random Words Quiz
Shows a random short word and displays animated ASL fingerspelling letters. Type what you see. Improve receptive skills.
Battery Series/Parallel Calculator - Online Voltage & Capacity
Combine multiple identical batteries in series and parallel and see the resulting voltage and total capacity. Electronics helper.
Fishing Sinker Weight vs. Depth Calculator – Online Drift Speed
Estimate the sinker weight needed to hold bottom in current based on line diameter, depth, and current speed.
Therapeutic Playlist Builder – Online by Mood & Tempo
Select a desired emotional state (calm, energize) and get a suggested song structure with BPM range.