Simple Time Tracker - Online Project & Task Hours Logger
Start/stop timer per project to log hours. See daily and weekly totals. Data stays in localStorage. Export summary as CSV. No account needed.
UD5 Toolkit
Start/stop timer per project to log hours. See daily and weekly totals. Data stays in localStorage. Export summary as CSV. No account needed.
Practice aligning grid items and tracks with the place‑items, align‑content, and justify‑content properties. Visual guide.
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.
Log the hours you slept each night and rate the quality. See a weekly bar chart. Local storage.
See how align‑items: baseline works in grid to align different font sizes on the same baseline. Visual guide.
Generate a CSS background that shows a baseline grid. Adjust line‑height and offset. Perfect for aligning text.
Record daily systolic/diastolic readings and pulse. See a trend chart. All data saved locally in your browser.
Structure your episode with timed segments. Includes call to action notes. Export as text.
Enjoy classic Tetris in your browser. Rotate, move, and drop tetrominoes. Clear lines and score. Fully local JavaScript.
Place multiple grid items into the same cells to create overlapping layouts. Learn the technique visually. Copy code.
Paste an URL or HTML and see the h1‑h6 hierarchy as a tree. Detect skipped levels and improve accessibility. Client‑side.
Answer questions and see typical milestones for 0-5 years. Educational reference for parents. Not a diagnostic tool.
Calculate exact elapsed time between two dates in years, months, weeks, and days. Countdown or time already passed. Simple, visual, and local.
Searchable table of well‑known TCP and UDP ports with their services. Check 80, 443, 3306, and many more.
Scroll a container and see how sticky elements behave. Adjust top, bottom, and scroll margins. Copy the code.
Paste CSV and get a beautiful HTML table with sortable headers (optional). Copy the full HTML/CSS snippet. Local.
Enter a domain and see public WHOIS info via a free API with rate limiting. Quick domain check.
Register a one‑off background sync and see it fire when connectivity returns. Debug service worker sync logic.
Encode or decode data to/from Base58 (Bitcoin alphabet). Useful for cryptocurrency address generation testing. Fully local, no data sent.
Create a breadcrumb schema for your website. Fill in the pages and get the ready‑to‑paste JSON‑LD snippet for rich results.
Enter a URL and see a nested list of all headings (h1‑h6). Check your document structure for SEO and accessibility. Pure fetch.
Use SSML <mark> tags to fire events during TTS. See text highlighted as it is spoken. Understand speech synthesis timing. local.
Live cryptocurrency prices from public APIs. Clean ticker with percentage changes. Pure frontend, no account needed.
Pick a color for each day's mood and see a month‑at‑a‑glance heatmap. Data stored locally. A private emotional log.
Simulate different cache strategies (Cache First, Network First, Stale‑While‑Revalidate) and see responses. Learn offline patterns.
Add or subtract days, weeks, and months to find a future or past date. Also compute duration between two dates. Essential for project planning.
Enter any date and get its ISO week number, plus the start and end dates of that week. Quick reference.
Every second, the background color changes to the hex code corresponding to the current time (HHMMSS). A beautiful, ever‑changing clock.
Test the modern File System Access API. Open a file, modify it, and save back to disk. All sandboxed in browser.
Drop a PDF and automatically detect tables. Export them to CSV or copy to clipboard. Works locally using PDF.js.