Geolocation API Simulator - Online Test Coordinates
Override your browser's geolocation to any coordinates and test how your app responds. For development and privacy testing.
UD5 Toolkit
Convert latitude and longitude coordinates into a human‑readable address instantly. Free, no API key required.
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accept-language header; however, this tool currently requests the default locale to keep things simple.Override your browser's geolocation to any coordinates and test how your app responds. For development and privacy testing.
Enter the approximate age of opened paint and answer visual/olfactory questions to see if it's still usable. Reduce waste.
Visual reference for CSS Grid properties. Click to see code snippets and visual demos.
Calculate the bearing (azimuth) and distance between two GPS coordinates using the Haversine formula. Great for orienteering. Local only.
Paste your manifest.json and instantly validate it against the W3C spec. Catch errors and warnings. Client‑side.
Write HTML, CSS, and JavaScript in separate panes and see the result in real time. Store your snippets locally.
Encode latitude/longitude into a geohash string and decode a geohash back to coordinates with precision info. Local algorithm.
Paste a Bitcoin, Ethereum, or other crypto wallet address and quickly verify its format and checksum. No connection to blockchain.
Type sender and recipient addresses and format them for printing on a standard envelope. No special software.