Random Color Naming Challenge - Online Eye Test
See a random color and type its name. Score based on accuracy. Fun for designers. Local.
UD5 Toolkit
Meditation & Focus Light · Relax your mind with gentle color pulses
See a random color and type its name. Score based on accuracy. Fun for designers. Local.
Enter a list of buzzwords or concepts and shuffle them into random pairs. Stimulate creative thinking. All local.
Manually manage flashcards with 5 virtual Leitner boxes. See when to review each box next. All data local storage.
Paste words with translations, shuffle, test yourself. Simple local spaced recognition.
Paste word pairs (or load pre-made sets) and practice with randomized flashcards. Flip to reveal translation, mark as known/unknown. Local data, no login.
Create glowing, neon‑style text effects with multiple text‑shadows. Adjust colors and intensity. Copy the CSS.
Create printable sight word flashcards from Dolch or Fry lists by grade level. Choose font size and card layout. Local only.
Enter a URL and see a visual map of the tab order. Detect broken tabindex values. Improve keyboard navigation.
Get random gift suggestions based on recipient age, relationship, and occasion. Browse through curated, gender-neutral ideas. No affiliate links, pure inspiration.
Create cards and review using a spaced repetition algorithm (Leitner box simulation). Cards stored locally. Improve exam prep.
Enter a URL and extract tab‐index order violations and focusable elements. Quick accessibility audit. Client‑side fetch.
Apply the drop‑shadow() filter and compare it with box‑shadow. See how it follows the contour of transparent images. Copy code.
Generate cryptographically secure BIP39 mnemonic phrases (12 or 24 words) for HD wallet seeds. All entropy generated locally.
Invent a fancy coffee blend name with origin and tasting notes. Perfect for a fictional café menu. All local.
Click a letter and watch an animated stroke order for print or cursive. Good for kids learning to write.
Create a creepy name for a haunted mansion or ghost story setting. Perfect for Halloween. Local.
Create a strong yet easy‑to‑remember passphrase from random common words. Combines 4‑6 words. Fully offline. XKCD compliant.
Watch classic sorting algorithms step through a randomized bar chart. Adjust speed and array size. Great for learning algorithm efficiency.
Create a simple grid or carousel album with local images and captions. Export as printable PDF. Private.
Understand how !important behaves inside @layer vs unlayered styles. Interactive example. Avoid common pitfalls.
Classic flip‑to‑match pairs game. Choose grid size and card theme. Tracks moves and time. All local.
Create a random superhero with a unique name, power, weakness, and origin story. Fun creative writing prompt. All frontend.
Enter a URL and get a quick simulation of First Contentful Paint, LCP, and CLS using browser metrics. Lightweight alternative.
See how a full paragraph looks with your chosen text and background colors. Not just a ratio; the real appearance.
Select a heading font and get recommended body font pairings. Live preview with sample text. Copy the CSS import links.
Adjust page characteristics (image size, server delay, layout shift) and see the simulated Core Web Vitals scores. Understand what impacts performance.
Randomly displays a constellation with its art and the associated myth from Greek or other cultures.
Apply dyslexia‑friendly fonts, spacing, and background to any text. Preview and copy the formatted version. Improve readability.
Load an animated GIF and adjust its frame delay to make it slower or faster. Download the modified GIF. All local.
Paste HTML and see the order in which elements would receive focus via Tab key. Highlight issues. Local accessibility testing.