This tool can transliterate/transcribe text both ways between the Latin script and:
greek: γρεεκ cyrillic: цыриллиц devanagari: दएवअनअगअरइ futhark: ᚠᚢᚦᚨᚱᚲ hiragana: ひらがな katakana: カタカナ hangul: 항울 old italic: 𐌏𐌋𐌃 𐌉𐌕𐌀𐌋𐌉𐌂 gothic: 𐌲𐍉𐌸𐌹𐌺 georgian (mkhedruli): გეორგიან mtavruli: ᲛᲗᲐᲕᲠᲣᲚᲘ armenian: արմենիան
ascii (dropping accents, expanding digraphs) fullwidth ꜱᴍᴀʟʟᴄᴀᴘꜱ
Unicode Plane 1 mathematical characters: 𝐛𝐨𝐥𝐝, 𝑖𝑡𝑎𝑙𝑖𝑐, 𝒃𝒐𝒍𝒅 𝒊𝒕𝒂𝒍𝒊𝒄, 𝓈𝒸𝓇𝒾𝓅𝓉, 𝓫𝓸𝓵𝓭 𝓼𝓬𝓻𝓲𝓹𝓽, 𝔣𝔯𝔞𝔨𝔱𝔲𝔯, 𝕕𝕠𝕦𝕓𝕝𝕖-𝕤𝕥𝕣𝕦𝕔𝕜, 𝖇𝖔𝖑𝖉 𝖋𝖗𝖆𝖐𝖙𝖚𝖗, 𝗌𝖺𝗇𝗌-𝗌𝖾𝗋𝗂𝖿, 𝘀𝗮𝗻𝘀-𝘀𝗲𝗿𝗶𝗳 𝗯𝗼𝗹𝗱, 𝘴𝘢𝘯𝘴-𝘴𝘦𝘳𝘪𝘧 𝘪𝘵𝘢𝘭𝘪𝘤, 𝙨𝙖𝙣𝙨-𝙨𝙚𝙧𝙞𝙛 𝙗𝙤𝙡𝙙 𝙞𝙩𝙖𝙡𝙞𝙘, 𝚖𝚘𝚗𝚘𝚜𝚙𝚊𝚌𝚎 (beware, many of your recipients may lack fonts necessary to display these)
Enclosed alphanumerics: circled: ⓒⓘⓡⓒⓛⓔⓓ parenthesized: ⒫⒜⒭⒠⒩⒯⒣⒠⒮⒤⒵⒠⒟ squared: 🅂🅀🅄🄰🅁🄴🄳 negative circled: 🅝🅔🅖🅐🅣🅘🅥🅔 🅒🅘🅡🅒🅛🅔🅓 negative squared: 🅽🅴🅶🅰🆃🅸🆅🅴 🆂🆀🆄🅰🆁🅴🅳 regional indicators: 🇷🇪🇬🇮🇴🇳🇦🇱 🇮🇳🇩🇮🇨🇦🇹🇴🇷🇸 (since recently, environments tend to show indicators as flags rather than enclosed letters — support is inconsistent, though)