CSS Baseline Grid Overlay - Online Typography Rhythm
Generate a CSS background that shows a baseline grid. Adjust line‑height and offset. Perfect for aligning text.
UD5 Toolkit
Practice your CSS selector skills by targeting dishes in our restaurant menu.
Type a selector and see the magic happen live.
.popular. You can chain multiple classes without spaces, e.g., .item.popular selects elements that have both classes.#myId) is unique per page and targets a single element, while a class selector (.myClass) can apply to multiple elements. IDs have higher specificity.[data-price="14"] selects elements with that exact attribute value. Partial matches like [data-price^="1"] (starts with) also work..mains .item selects all .item elements that are anywhere inside a .mains element, not just direct children..item:first-child selects an .item that is the first child of its parent.Generate a CSS background that shows a baseline grid. Adjust line‑height and offset. Perfect for aligning text.
Place multiple grid items into the same cells to create overlapping layouts. Learn the technique visually. Copy code.
Practice aligning grid items and tracks with the place‑items, align‑content, and justify‑content properties. Visual guide.
Enjoy classic Tetris in your browser. Rotate, move, and drop tetrominoes. Clear lines and score. Fully local JavaScript.
Scroll a container and see how sticky elements behave. Adjust top, bottom, and scroll margins. Copy the code.
Enter a URL and see a nested list of all headings (h1‑h6). Check your document structure for SEO and accessibility. Pure fetch.
Play the classic Connect Four in your browser against a friend or CPU. Drop discs to get four in a row. Clean SVG board, local logic.
See how align‑items: baseline works in grid to align different font sizes on the same baseline. Visual guide.
Paste CSV and get a beautiful HTML table with sortable headers (optional). Copy the full HTML/CSS snippet. Local.
Create a breadcrumb schema for your website. Fill in the pages and get the ready‑to‑paste JSON‑LD snippet for rich results.
Lay down a beat on a grid sequencer for kick, snare, and hi-hat. Play, loop, and adjust tempo. All sound via Web Audio API.
Simulate different cache strategies (Cache First, Network First, Stale‑While‑Revalidate) and see responses. Learn offline patterns.
Paste an URL or HTML and see the h1‑h6 hierarchy as a tree. Detect skipped levels and improve accessibility. Client‑side.
Create a basic Playwright script with browser launch, page navigation, and screenshot. Start E2E testing instantly.
See a flag and pick the country among four choices. Timed rounds with score. Perfect for geography buffs. Local data.
Randomly generated subnetting questions. Calculate network address, broadcast, and usable range. For CCNA prep.
Use SSML <mark> tags to fire events during TTS. See text highlighted as it is spoken. Understand speech synthesis timing. local.
Searchable table of well‑known TCP and UDP ports with their services. Check 80, 443, 3306, and many more.
A silhouette of a country appears; type the name. Timed guesses. Great for geography buffs.
Start/stop timer per project to log hours. See daily and weekly totals. Data stays in localStorage. Export summary as CSV. No account needed.
Paste a SQL CREATE TABLE statement and extract just the column names as a CSV header row. For data migration.
Keep track of stitches and rows for your knitting projects. Multiple counters with increase/decrease shortcuts. Data saved in your browser.
Every second, the background color changes to the hex code corresponding to the current time (HHMMSS). A beautiful, ever‑changing clock.
Create colorful digital sticky notes on a corkboard. Drag, edit, and delete. Notes persist in local storage. No login.
Paste CSV and get a list of SQL INSERT statements. Define table name and column mapping. All local conversion.
Register a one‑off background sync and see it fire when connectivity returns. Debug service worker sync logic.
A country border shape appears, guess the nation. Multiple choice. Score tracking. Learn geography visually. Local SVG shapes.
Answer questions and see typical milestones for 0-5 years. Educational reference for parents. Not a diagnostic tool.
Interactive quiz to learn all 50 US state capitals. Choose mode: capital to state or state to capital. Map highlight available. Works offline.
Test your knowledge: given a state name, pick its capital. Timed, with scoreboard. Learn all 50. No login.