Pet Emergency Info Card – Online Fill & Print
Fill in your vet's number, poison control, and pet details. Print a card for your wallet or fridge.
UD5 Toolkit
Ensure your kit is complete — track, print, and stay prepared.
Fill in your vet's number, poison control, and pet details. Print a card for your wallet or fridge.
Generate a camping checklist based on trip style (car, backpacking, glamping). Check off items. Fully local.
Check if a word or phrase is a palindrome (reads same forward and backward). Live validation and fun facts.
Select symptoms to see possible vitamin links and food sources. Not medical advice, educational.
Enter your weight, height, boot sole length, and skier type to see the recommended DIN release setting.
Enter adjusted gross score, course rating, and slope to calculate the round's handicap differential. Track your index.
Enter recent scores, course rating, and slope to estimate a golf handicap index. Simple formula for unofficial tracking. Local only.
Paste HTML snippet and see calculated tab order. Identify missing focusable elements. A11y helper.
Generate random Scattergories‑style lists with a random letter and 12 categories. Great for online game night.
Validate YAML syntax with line‑by‑line error messages. Also format messy YAML into clean, indented output. All in your browser.
Paste HTML and detect unclosed tags, invalid nesting, and duplicate IDs. Lightweight client‑side validation.
Paste a test card number to verify Luhn algorithm, identify issuer (Visa, MC), and check length. No real data.
Quickly test SQL JOIN syntax (INNER, LEFT, RIGHT, FULL) with a sample database schema. Check logic and see conceptual result set without a real DB. Local only.
Enter any phrase and instantly see if it's a palindrome, ignoring spaces and punctuation. Fun for word nerds.
Select parent colors and genotypes to predict possible offspring coat colors. Based on simple Mendelian genetics for common breeds.
Generate tints (add white) and shades (add black) for any base hex color. Copy values for design systems. Instant local generation.
Paste your SQL query and check for basic syntax errors. Highlights missing commas, wrong keywords. Local analysis.
Enter products with different prices and weights/volumes. The tool ranks them by best value per unit. Save money effortlessly.
Paste tab‑separated or CSV data and instantly get a beautifully aligned Markdown table. Essential for documentation.
Use the new `commandfor` and `command` attributes to invoke actions on other elements without JavaScript. See the spec live.
Calculate absolute error, relative error, and percent error between experimental and theoretical values. For science students. Instant local math.
Instantly generate random UUIDs (version 4) for use as unique identifiers in software development. No registration, completely free and private.
Measure your handle circumference and preferred overlap to see how long your overgrip tape needs to be.
Shows a random short word and displays animated ASL fingerspelling letters. Type what you see. Improve receptive skills.
Select a heading font and see a set of well‑paired body fonts. Live preview with your own text. Copy the import code.
Convert any text into its binary representation (8-bit per character). See the raw bits. Suitable for learning computer fundamentals. All local.
Find complementary, triadic, analogous, and split-complementary color combinations. Interactive color wheel. Essential for UI design.
Paste your sitemap XML and check for missing namespaces, invalid URLs, or size limit violations. Keep your SEO healthy.
Build 'I feel... when... because...' statements interactively. Improve communication in relationships. Local only.
Enter notes or chords on a virtual fretboard and generate ASCII tablature. Quick way to share musical ideas.