Color Harmony Chooser - Online Complementary & Triadic
Find complementary, triadic, analogous, and split-complementary color combinations. Interactive color wheel. Essential for UI design.
UD5 Toolkit
Great typography is the foundation of exceptional design. The right pairing of typefaces creates visual hierarchy, establishes brand personality, and guides readers effortlessly through content. When heading and body fonts complement each other, the reading experience becomes both beautiful and functional.
Find complementary, triadic, analogous, and split-complementary color combinations. Interactive color wheel. Essential for UI design.
Two players type the same text on the same keyboard (WASD vs Arrow zones) and race to finish first. Fun classroom game.
Enter a color palette and see how it looks for different types of color vision deficiency. Get warnings on conflicting colors.
Enter any phrase and instantly see if it's a palindrome, ignoring spaces and punctuation. Fun for word nerds.
Paste a set of hex colors and simulate how they appear with common color vision deficiencies. Get contrast warnings.
Create a polished HTML email signature with your photo, links, and company details. Live preview and copy HTML to clipboard. Works with Gmail, Outlook, Apple Mail.
Check if a word or phrase is a palindrome (reads same forward and backward). Live validation and fun facts.
Check the contrast ratio between foreground and background colors to ensure web accessibility compliance. Get WCAG 2.1 AA/AAA pass/fail results instantly.
See a live bar chart of character frequencies as you type or paste text. Great for cipher cracking and linguistics.
Design a clean, professional email signature with your photo, links, and disclaimers. Copy the HTML to use in Gmail/Outlook.
Generate the <meta name='color‑scheme'> tag and CSS property to enable native dark/light rendering. Quick copy.
Display a Snellen chart on screen and mark distance for a fun self-test. Not a replacement for professional exam.
Press keys on your physical keyboard and see them highlighted on a virtual keyboard. Detects multi-key rollover. Quick hardware check.
Enter a city to get current UV index forecast using open data (with local caching). Understand sun protection needs. No personal location used.
Build a palette and simulate how it appears to various color deficiencies. Also generate pre-vetted accessible palettes. Local processing.
Pick a source color and generate a complete M3 tonal palette with light/dark schemes. Export as CSS custom properties.
Design simple text‑based labels and print them on standard Avery label sheets. Choose from common templates.
Interactive ASCII table showing decimal, hex, octal, and binary codes for all standard and extended ASCII characters. A classic programmer reference.
Choose colors and knot types to design a bracelet pattern. See visual guide. Save locally.
Type up to 3 characters, choose colors, and download a simple favicon.ico. No design skills.
Discover beautiful color palettes for your projects. Generate random, complementary, or trendy schemes and copy hex codes. Useful for designers and developers.
Experiment with the CSS color-mix() function. Pick two colors and mix them in different color spaces (srgb, oklch). Copy the CSS.
Paste HTML and detect unclosed tags, invalid nesting, and duplicate IDs. Lightweight client‑side validation.
Two players spin wheels to accumulate points. First to target wins. Customizable segments.
A simple 5x5 or 7x7 crossword with clues. New one daily or generate random. Works offline.
Build and test regular expressions against sample text. Real-time match highlighting, capture groups display, and flavor options. All inside your browser.
Answer a few questions and get a playful color-based personality result. For entertainment only.
Type a passage and see it appear in a realistic cursive font. Helps connect handwriting to digital text.
Write text with inline footnote markers and this tool will move the notes to the bottom and add proper Markdown links. Saves time.
Generate tints (add white) and shades (add black) for any base hex color. Copy values for design systems. Instant local generation.