It converts latex to unicode where possible. It's pretty impressive how much of Latex can be replaced with Unicode today.

This program translates LaTeX markup to human-readable Unicode when possible.

Here's the default text from that webapp:

Basic math notations: ∵ A͡B + B͡C ≠ A͡C ∴ ∬∜x̅ ξᶿ⁺¹ - ⅜ ≤ Σ ζᵢ ∴ ∃x∀y x ∈ Â

Easily type in hundreds of other symbols and special characters: , ℵ, Œ, ⇊, etc.

Font styles support: 𝔹𝕝𝕒𝕔𝕜 𝔹𝕠𝕒𝕣𝕕 𝔹𝕠𝕝𝕕, 𝔉𝔯𝔞𝔨𝔱𝔲𝔯, 𝐁𝐨𝐥𝐝 𝐅𝐚𝐜𝐞, 𝓒𝓪𝓵𝓵𝓲𝓰𝓻𝓪𝓹𝓱𝓲𝓬, 𝐼𝑡𝑎𝑙𝑖𝑐, 𝙼𝚘𝚗𝚘𝚜𝚙𝚊𝚌𝚎.

Now type in this box and try it yourself. ⌣̈