UD5 Toolkit
@font‑face unicode‑range Builder - Online Subset Definition
Select character sets (Latin, Cyrillic, Greek) and generate the exact unicode‑range descriptor for your fonts. Improve performance.
TLD & Domain Extension Lookup - Online All Endings
TLD & Domain Extension Lookup
Explore all possible domain endings for your brand or keyword. Instantly generate full domain names and check availability with one click.
Please enter at least 2 characters (letters, numbers, hyphens).
| TLD | Domain | Type | Actions |
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Frequently Asked Questions
A Top-Level Domain (TLD) is the last segment of a domain name, located after the final dot. Common examples include .com, .org, .net, and country-specific endings like .uk or .de.
Generic TLDs (gTLDs) like .com, .info, .biz are open to all registrants. Country Code TLDs (ccTLDs) represent specific countries or territories (.us, .uk). New gTLDs are the newer extensions introduced in recent years, such as .blog, .shop, or .tech, offering more naming flexibility.
This tool provides a complete list of possible domain names, but actual availability must be verified through a domain registrar. Use the “Check” button next to each domain to quickly search on Namecheap. Always confirm before purchasing.
.com remains the most recognized and trusted extension. If your preferred .com is taken, consider relevant new gTLDs like .shop, .online, or .tech, or a ccTLD if your audience is local. Make sure the domain aligns with your brand.
Absolutely. The TLD & Domain Extension Lookup is completely free and works instantly in your browser. No registration required.
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.
Retirement Calculator - Online Savings & Investment Planner
Project your retirement savings growth with monthly contributions, employer match, and CAGR. Interactive chart. Financial data stays on your device.
Resume Generator - Online Simple One Page CV
Fill in your details and instantly get a clean, printable one-page resume. No sign up, no data leaves your browser.
One‑Page Resume Builder - Online Simple CV Generator
Fill in a form to generate a clean, ATS‑friendly one‑page resume. Customize sections, colors, and export as print‑ready PDF. Personal data stays in your browser.
Platform Authenticator Demo - Online Fingerprint & Face ID
Test your device's built‑in biometric (Touch ID, Face ID, Windows Hello) using the Web Authentication API. Register and verify.
Jigsaw Puzzle Glue Coverage - Online How Much to Buy
Calculate how many bottles of puzzle glue you need based on puzzle dimensions. Save a trip to the store. Simple area math.
TOML to YAML Converter - Online Config Translator
Convert TOML configuration files to equivalent YAML with perfect structure preservation. Fast and local.
Z‑Index Stacking Context Tester - Online Layering Debugger
Paste HTML/CSS snippets or enter properties to test how z‑index and stacking contexts interact. Real‑time example.
Origami Crane Instructions – Online Animated Paper Folding
Follow along with animated crease patterns to fold a paper crane. Pause and rewind steps.
Date/Time Format Sandbox - Online Intl.DateTimeFormat Tester
Experiment with JavaScript Intl.DateTimeFormat options. Choose locale, dateStyle, timeStyle, hour12 and see live output. Copy the code snippet for your project.
Flex‑Basis Calculator & Visualizer - Online CSS Flex
Enter container width, number of items, gap, and flex‑basis. See the resulting sizes instantly. Plan your flex layout.
Image Alt Text Linter - Online Check Missing & Redundant Alts
Paste an HTML snippet and get a report on missing, empty, or suspicious alt texts. Improve your image SEO and a11y.
EyeDropper API - Online Pick Any Screen Color
Use the EyeDropper API to sample a color from anywhere on your screen. Click, select, and copy the hex. No extensions needed.
Password Policy Visualizer - Online See Rules in Action
Define password rules and see a live checklist that updates as you type. Design better password UX for your app.
Barcode Generator - Free Online 1D Barcode Maker
Generate standard 1D barcodes including CODE128, EAN-13, and UPC-A. Download as image for product labeling or inventory. All processing happens locally.
box‑decoration‑break Demo - Online Inline Box Fragmentation
See the difference between clone and slice on inline boxes that break across lines. Useful for multi‑line headings.
Spring Constant & Elastic Energy Calculator – Online Hooke's Law
Enter spring constant and displacement to find force and stored energy. Visual compression.
Gray Code Converter - Online Binary to Reflected Code
Translate between binary and Gray code (reflected binary code). See the bit changes. Useful for digital logic.
Torque Converter - Online Newton-Meter & Foot-Pound Tool
Convert torque units between Newton-meter, foot-pound, inch-pound, and more. Essential for mechanics and engineers. Instant local conversion.
:focus‑visible vs :focus Demo - Online Accessible Outlines
See the difference between :focus and :focus‑visible on interactive elements. Learn which to use for better UX.
Capacitor Code Calculator - Online 3-Digit to Picofarad & Nanofarad
Convert 3-digit capacitor codes (like 104, 222) to capacitance value in pF, nF, µF. Also converts back. Useful for reading tiny ceramic capacitors.
overflow‑clip‑margin Demo - Online Visible Beyond Clip
Learn how to let content extend a few pixels beyond a clip boundary with overflow‑clip‑margin. Interactive playground.
.editorconfig Generator - Online Uniform Code Styles
Build a .editorconfig file by setting indentation, charset, and end‑of‑line rules for your project. Keep all contributors aligned.
Poker Hand Odds Calculator - Online Texas Hold'em Win Probability
Enter your hole cards and the community cards to see probability of winning, drawing, etc. Simple simulation in browser. Educational, not gambling.
Outlet Spacer Guide – Online Need for Recessed Box?
Interactive check: if your tile backsplash or paneling adds thickness, determine if you need box extenders.
Lorem Ipsum Generator - Online Placeholder Text Creator
Generate Lorem Ipsum placeholder text for your designs and mockups. Specify paragraphs, words, or bytes. Produce classic or custom dummy content instantly.
CSS Blend Mode Playground – Online background-blend-mode & mix-blend-mode
Load images or use colors and apply all 15 CSS blend modes. Visual tester for creative effects.
Picture Hanging Height Calculator – Online Eye‑Level Guide
Find the ideal height to hang art based on wall and furniture dimensions. Follow gallery standard 57‑inch center rule.
Shared Worker Demo - Online Cross‑Tab State
Set up a Shared Worker that shares state across multiple browser tabs. Counter and messaging demo. Advanced web.