Based on our available integrations, we have several vendors that work with LinkedIn URLs, but they primarily find LinkedIn URLs from other data points rather than resolving existing URLs to canonical LinkedIn URLs.
For contact LinkedIn URLs, Identity Matrix can find LinkedIn URLs using a prospect's email, and Minerva can find LinkedIn profiles using name, email, or phone number. For company LinkedIn URLs, vendors like ContactOut, Snov.io, and others work with LinkedIn URLs as inputs but focus on enriching data from those URLs rather than URL canonicalization.
What specific type of URL are you looking to convert to a canonical LinkedIn URL - is it a LinkedIn URL variant or a different type of URL entirely?