Simple Online Journal - Private Daily Notes & Diary
Write and store encrypted daily journal entries directly in your browser's localStorage. Export as TXT. No sign-up, fully private.
UD5 Toolkit
Write and store encrypted daily journal entries directly in your browser's localStorage. Export as TXT. No sign-up, fully private.
Write a message and set a future date. It will be hidden until that day. All stored locally with countdown.
A visual guide to common copy‑editing and proofreading symbols. Click a mark to see its meaning. For writers.
Find out what day number of the year any date is (1‑366). Also shows days remaining. Simple reference.
Find what day of the week any past or future date falls on. Uses Zeller’s congruence. Fun historical reference tool.
Pomodoro timer that saves completed sessions to localStorage. View daily/weekly stats. Boost productivity with data.
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.
Write a JavaScript snippet and get a ready‑to‑drag bookmarklet link. With minification and encoding. Easy browser tools.
Convert any date into Roman numerals (day‑month‑year) for tattoos or special occasions. Clean and local.
Paste any JavaScript snippet and get a ready‑to‑drag bookmarklet link. Minify and encode automatically. Pure client.
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.
Choose label type and get the best technique (baking soda, steam, milk) to remove it intact.
Emojis are scrambled; you must reorder them to form the correct phrase or title. Fun word play.
Enter any date and instantly know which quarter it belongs to. Also shows fiscal quarter if start month set.
Calculate resistor values for transistor fixed bias or voltage divider configuration. Quick quiescent point analysis.
A big button that triggers a colourful confetti cannon full‑screen. Use it to celebrate small wins. Pure joy.
Enter two Unix timestamps and get the exact difference in days, hours, minutes, and seconds. Quick time debugging.
Add player names and tap +/- to track scores. Custom starting points. Works for any game.
See a list of notable historical events that happened on this day across years. Static data, no API needed.
Log daily temperature and humidity of your incubator. Get alerts when approaching critical days. Improves hatch rate.
Convert any integer up to 3999 into its Roman numeral representation and vice versa. Quick and accurate. Local.
Quick reference for what to do (and not do) after a snake bite. Pressure immobilization bandage diagram.
Paste long text and split it into 2, 3, or 4 balanced CSS columns. Preview and copy HTML/CSS. For magazine layouts.
Compute Poisson probabilities for a given mean rate. Ideal for call centers, traffic analysis. Instant chart.
Paste a URL or HTML to detect known vulnerable JavaScript library versions. Quick security audit. Client‑side only.
Generate a horizontal Code‑128 barcode from any string. Download as PNG or SVG. Works offline. For inventory.
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.
Type JavaScript expressions and see output like a real browser console. Supports console.log, error, warn. Use for quick testing without DevTools.