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About this tool
Write Hindi birthday messages tuned to relationship and tone, with correct aap or tum forms, romanisation and SMS length.
Hindi Birthday Wishes Generator writes a complete Hindi birthday message — greeting line, wish and sign-off — from the relationship you pick and the tone you want. Hindi distinguishes आप from तुम, and that choice changes the possessive (आपका versus तुम्हारा) and the verb ending, so each wording here is stored twice rather than patched, and the register is set automatically from the relationship. Every message comes with romanised Hindi, an English meaning, and the number of SMS parts it needs.
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Provide your input — an image, text, or data.
Let the tool analyze or generate the result.
Review, refine, and reuse the output wherever you need it.
Both registers are written out in full, so possessives and verb endings agree.
Every message ships with a transliteration for phones without a Devanagari keyboard.
Devanagari is UCS-2 over SMS, so the tool counts the 70/67-character parts for you.
The two everyday forms are जन्मदिन की हार्दिक शुभकामनाएँ (janmadin kī hārdik shubhkāmnāeṁ), literally 'heartfelt birthday wishes', and जन्मदिन मुबारक हो (janmadin mubārak ho). For 'many happy returns', Hindi speakers say जन्मदिन की बहुत-बहुत बधाई.
Use आप for parents, teachers, managers, clients and anyone older or senior; use तुम for friends, siblings of your own age or younger, and children. आप changes the possessive to आपका and the verb to the -एँ form, which is why the two versions are written separately rather than swapped word by word.
Devanagari falls outside the GSM 03.38 7-bit alphabet, so the message is encoded as UCS-2. That drops the limit from 160 characters to 70 in a single SMS, and to 67 per part once the message is split, under 3GPP TS 23.038. WhatsApp and other data apps are unaffected.
शुभकामनाएँ means good wishes for what lies ahead, so it suits a birthday, a new job or an exam. बधाई is congratulation on something already achieved, and on a birthday it carries the sense of 'many happy returns'. Both are correct on a birthday card; शुभकामनाएँ is the safer formal choice.