Pomodoro Timer with History - Online Track Focus Sessions
Pomodoro timer that saves completed sessions to localStorage. View daily/weekly stats. Boost productivity with data.
UD5 Toolkit
Discover what happened on every day of the year
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Pomodoro timer that saves completed sessions to localStorage. View daily/weekly stats. Boost productivity with data.
Compute Poisson probabilities for a given mean rate. Ideal for call centers, traffic analysis. Instant chart.
Find out what day number of the year any date is (1‑366). Also shows days remaining. Simple reference.
Animate elements as they enter and exit the viewport using view() timeline. Parallax and reveal effects without JS.
Find what day of the week any past or future date falls on. Uses Zeller’s congruence. Fun historical reference tool.
A big button that triggers a colourful confetti cannon full‑screen. Use it to celebrate small wins. Pure joy.
Convert any date into Roman numerals (day‑month‑year) for tattoos or special occasions. Clean and local.
Convert any date into Roman numerals (day‑month‑year) for tattoos or special occasions. Clean and local.
Add N business days to a date, skipping weekends and optionally entering custom holidays. Regional presets.
Play the classic Snake game inside your browser. Arrow keys to move, eat the apple, grow longer. High score tracked locally.
Write and store encrypted daily journal entries directly in your browser's localStorage. Export as TXT. No sign-up, fully private.
Enter any date and instantly know which quarter it belongs to. Also shows fiscal quarter if start month set.
Write a message and set a future date. It will be hidden until that day. All stored locally with countdown.
Load a video file and grab any frame as a still image. Navigate frame by frame. Download the snapshot. All done on your device.
Enter two Unix timestamps and get the exact difference in days, hours, minutes, and seconds. Quick time debugging.
Convert any integer up to 3999 into its Roman numeral representation and vice versa. Quick and accurate. Local.
Write daily notes encrypted with a password. All data stored in your browser. Export as encrypted file. True privacy.
Set a short timer with a themed emoji animation (e.g., pizza cooking). A playful visual countdown.
Design a fully styled scrollbar with colors, width, and border radius. Get the CSS for Chrome and Firefox.
Convert numbers to Roman numerals and decode Roman numerals back to numbers. Supports up to large values. A fun educational tool running entirely in your browser.
Select a US state and legal category (debt, personal injury) to see typical time limits. Quick informational guide.
Add player names and tap +/- to track scores. Custom starting points. Works for any game.
A visual guide to common copy‑editing and proofreading symbols. Click a mark to see its meaning. For writers.
Type JavaScript expressions and see output like a real browser console. Supports console.log, error, warn. Use for quick testing without DevTools.
Enter your clay's shrinkage rate and the desired fired size to determine the wet dimensions you need to throw or slab build. Essential for functional ware.
Enter frame size and image size to calculate mat borders. Visual preview. Precise framing.
Write a JavaScript snippet and get a ready‑to‑drag bookmarklet link. With minification and encoding. Easy browser tools.
Paste any JavaScript snippet and get a ready‑to‑drag bookmarklet link. Minify and encode automatically. Pure client.
Create simple 2‑ or 3‑set Venn diagrams by entering comma‑separated lists. Shareable via URL fragment. No account.
Calculate resistor values for transistor fixed bias or voltage divider configuration. Quick quiescent point analysis.