Hindi Transliteration Tool: Hinglish to Devanagari and back

No. Transliteration changes the script, not the language: "aap kaise hain" becomes आप कैसे हैं, which is still Hindi, and आप कैसे हैं becomes "aap kaise hain". To change the meaning into English or Hindi you need a translator, or better, a person who knows both languages.

A marked word was built from our spelling rules, has more than one spelling in our lists ("kam" can be कम or काम), or is also an English word ("the" can be थे in Hinglish). Tap it to see other likely spellings and pick the right one. Your pick is saved in this browser under "Your spellings" and used for that word from then on.

Write it the way your readers read and search. Google works out a page's language from its visible text, and asks for a title in the same writing system as the page: its example is a Hindi page, whose title should be in Hindi rather than in English letters. If you write in Devanagari, keep the title, headings and text in Devanagari too.

Either can work. Google suggests words in your audience's language in the URL, and transliterated words where that fits, with hyphens between words. Browsers show Devanagari letters in the address bar, but the link itself carries them percent-encoded (UTF-8), so a short Devanagari slug becomes a long string of %E0 codes when it is copied as text. The tool shows the slug both ways so you can choose.

IAST, the International Alphabet of Sanskrit Transliteration, writes each Devanagari letter with one Latin letter, some with accents, and writes every a, so भारत is bhārata and कमरा is kamarā. It was made for Sanskrit, so it has no letters for ज़, फ़, क़, ख़, ग़, ड़ and ढ़, or for ऑ in English words; the tool writes z, f, q, k͟h, ġ, ṛ, ṛh and ô for them. Use it for study and references. For posts and messages, the Hinglish style is easier to read.