Tangled Mind

My google-fu is failing me on this, but AKICOLJ ...

The problem:
- I am checking pages which include non-standard characters (e.g. quotations in Greek, names in Turkish, mathematical functions, astronomical symbols etc.)
- These characters are coded as Unicode Hexadecimal NCRs, e.g. Tòν is coded as Tòν
- All Unicode characters must be supported in Verdana

My current modus operandi:
- for each character, do a copy-paste-find on this page of supported characters
- or for slightly longer texts, get the NCRs converted via this copy-paste conversion utility, and look at included/excluded ranges on the page of supported characters

What I really really want:
- a website (nothing downloadable) where I can:
--- copy the non-standard text (or, failing that, the HTML code with the NCRs)
--- paste it into a text box
--- specify 'show me this in Verdana'
--- be alerted to (or at least be able to see) which characters are supported and which are not.

Alternatively
- point out the bleedin' obvious solution which I am missing!