Tools starting with U

Compare products by price per unit to find which is genuinely cheaper.

Convert between chmod octal values and rwx permissions, with the command to copy.

Convert Unix timestamps to human dates and back, in local time and UTC, with ISO 8601 output.

Build a URL from a base address and named parameters, with encoding handled for you.

Strip utm, gclid, fbclid and other tracking parameters from one URL or a whole list.

Percent-encode text for safe use in URLs, or decode an encoded URL back to readable text.

Remove named parameters from a URL, or a list of URLs, keeping the rest intact.

Break any URL into protocol, host, port, path, query parameters and fragment.

Check whether a URL is well-formed, and see exactly what is wrong when it is not.

Break a user agent string into browser, engine, operating system and device.

Build campaign tracking URLs with correctly encoded utm_source, medium, campaign, term and content.

Generate random version 4 UUIDs in bulk, with uppercase and no-hyphen options.

Check a UUID is well-formed and find out what its version actually reveals.