Local Font Inspector - Online See All Font Metrics
Select a local font and see all its metrics: ascent, descent, x‑height, and supported features. Typography deep dive.
UD5 Toolkit
Instantly find, browse, and copy currency symbols from around the world — including fiat and cryptocurrencies.
No currencies match your search.
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Select a local font and see all its metrics: ascent, descent, x‑height, and supported features. Typography deep dive.
Paste two strings that look the same and see if they differ after normalization. Debug invisible encoding bugs.
Enter target total weight and bar weight to see which plates to put on each side. No more counting errors.
Enumerate all fonts installed on your device and see a real‑time preview. Useful for design tools. Permission required.
Enter a city name or coordinates and see today's sunrise, sunset, and twilight times. Approximate algorithm. Local.
For any latitude and date, calculate the exact daylight hours. See golden hour. Useful for gardening and travel.
Calculate antenna element lengths for a given frequency (or vice versa). Supports 1/4 wave, 1/2 wave, dipole. Useful for ham radio. Local only.
Paste a Base64 encoded font string and generate the complete @font‑face CSS rule. Inline small fonts easily.
Load a WAV file and see its real-time oscilloscope trace and frequency spectrum. Zoom and pan. Pure frontend.
Use the document.fonts API to check if a font is loaded. Watch the ready promise. Avoid FOUT. JavaScript demo.
Search and browse a comprehensive table of SI units and common imperial conversions. For students and engineers.
Enter an acronym and see its most common full forms. Static dictionary. No internet needed after load.
Convert currencies using a built‑in table of approximate fixed rates. Useful for quick estimates without live data. Local.
Searchable grid of all named HTML character entities with previews. Click to copy &, <, © etc. For web devs.
Searchable table of well‑known TCP and UDP ports with their services. Check 80, 443, 3306, and many more.
Convert a numeric amount into English words, perfect for writing checks or legal documents. Supports USD/GBP styles.
Reference diagrams for USB‑A, USB‑C, micro‑USB pinouts. See wire colors and signal descriptions. Hardware hacking helper.
See the current UV index forecast or enter a value to learn protection needed (SPF, hat, shade). Educational.
See all elements sorted alphabetically by symbol. Picture and atomic weight. Beautifully styled static list.
Enter an English word to get a brief etymology (Latin, Greek, etc.) and root meaning. From curated static data.
Identify a Chinese character by selecting its radicals. List possible Hanzi. Built‑in reference for learners.
Enter a number of sides (3‑100) and get the correct polygon name (triangle, hectogon). Fun geometry reference.
Click a planet to see mass, diameter, moons, temperature, and distance from sun. Beautifully styled static data.
Scroll through thousands of pre‑computed digits of π. Search for a specific string of digits. For math lovers.
Enter a dialling code (+44, +1) to find which country it belongs to. Also search by country name. Static reference.
Search common dream symbols and their traditional meanings. For entertainment and self-reflection. Static data.
Convert between currencies using manually updated or default rates. Great for estimation when offline. Local settings.
A searchable list of essential Docker CLI commands for managing containers, images, and volumes. Copy-paste friendly. Always handy.
Quick reference for frequently used Git commands with examples. Searchable and categorized. A handy resource for all developers.
Search the complete emoji set by keyword or code. Click to copy. Includes skin tones and flags. Always up to date with Unicode.