Accessible Form Builder - Online Semantic HTML Generator
Create a fully accessible form by adding fields; the tool generates the proper labels, inputs, and ARIA attributes. Copy the clean HTML.
UD5 Toolkit
Create a fully accessible form by adding fields; the tool generates the proper labels, inputs, and ARIA attributes. Copy the clean HTML.
Pick a base color and generate a 10βstep scale where each step meets a specific contrast ratio against white or black. Export as CSS custom properties.
Follow along with animated crease patterns to fold a paper crane. Pause and rewind steps.
Draw a digit (0β9) on the canvas and a simple neural net guess the number. Educational demo. No upload.
Flip a coin with adjustable bias (e.g., 70% heads). Used for random decision-making when you want to gently influence outcomes. History & stats shown.
Request HID devices and list them. Read input reports and send output. For custom hardware and controllers.
Upload any image, add a thick white border and drop shadow, and turn it into a sticker. Download as transparent PNG.
Enter current weight and age to estimate adult weight based on growth curves. For purebred and mixed.
Click colors on an interactive wheel and see the common emotions and meanings associated with them. A design resource.
Convert English text to Braille (Grade 1 and simple Grade 2 contractions). Educational tool to understand Braille representation. Local only.
Simulate how images and UI elements appear to users with various types of color blindness. Upload or paste image URL. Promote inclusive design.
Convert volume and capacity units: gallon (US/UK), liter, milliliter, cup, and fluid ounce. Handy for cooking and science. Works entirely offline.
Enter pot volume and tea type to find the right amount of dry leaf considering expansion. Avoid overflowing.
Start with a base color and generate an extended palette where every shade contrasts properly with white and black. Export tokens.
Shift the color temperature of your photo towards warm (orange) or cool (blue). Instant canvas filter. Download result.
Convert carabiner strength from kN to kg/lbs and understand Major Axis vs Minor Axis markings. Quick educational reference for climbers.
Pick colors using the HWB (HueβWhitenessβBlackness) model. Get the CSS hwb() function code. Simpler than HSL for some.
Test the experimental Translation API to translate text between languages directly in the browser, without cloud calls. Check support and copy the JavaScript starter.
View the moon phase for any date in past or future. See full moon dates and eclipses for a given year.
Enter original and target color to compute the exact CSS hueβrotate(deg) filter needed. For precise icon and image tinting.
A big button that triggers a colourful confetti cannon fullβscreen. Use it to celebrate small wins. Pure joy.
Estimate the baby's due date based on last menstrual period (LMP) or conception date. Also shows current week and trimester. Educational only.
Fetch a siteβs HSTS header and validate its syntax, maxβage, and subdomain flags. Ensure your site enforce HTTPS.
Reverse entire text, flip letters, or reverse word order. Fun for puzzles and creative writing. Instant transformation without data leaving your browser.
Generate a grand, aristocratic title like 'Duke of Waffleshire'. Perfect for silly fun or RPG characters. Local.
See how a PWA can extend content into the title bar area on desktop. Customize the window controls overlay.
Add N business days to a date, skipping weekends and optionally entering custom holidays. Regional presets.
Click any color to see common emotional associations and cultural meanings. Quick design reference.
Search common dream symbols and their traditional meanings. For entertainment and self-reflection. Static data.
Paste an HTML snippet and check for common ARIA mistakes: missing labels, invalid roles, and ariaβhidden misuse. Educate your team.