Why Hindi Matras and Conjuncts Break in PDFs
Hindi is written left to right, but that does not make it a simple character-by-character script. Devanagari uses combining marks, reordering, and conjunct consonants. A converter that prints each code point independently can put a matra on the wrong side or split a conjunct into visible pieces.
Use a meaningful test string
Single letters are not enough. Test a sentence with common vowel signs and conjuncts such as क्ष, त्र, ज्ञ, श्र, and words containing the pre-base ि matra. The Hindi text-to-PDF page includes a short sample for this purpose.
Compare the source and PDF at normal zoom. Check whether marks sit on the correct character, whether conjuncts form correctly, and whether line height clips anything above or below the baseline.
Check the source encoding
Modern Hindi keyboards create Unicode Devanagari. Older documents may use a legacy font where Latin code points are displayed as Hindi-looking glyphs. If the text turns into Latin letters when the original font is removed, it must be converted to Unicode before PDF creation.
Choose a complete Devanagari font
A font must contain more than the basic consonants. It also needs the relevant combining marks and shaping behavior. Use a modern Unicode Devanagari family, then test the exact weights you plan to use. Bold may be a separate font file with different coverage.
Font substitution can preserve the characters while changing line breaks. Inspect page endings and headings, not just glyph shapes.
Hindi mixed with English and numbers
Hindi, English, and Western numbers all flow left to right, so direction is usually straightforward. Problems more often come from inconsistent fallback fonts: English may sit on a different baseline or have different visual weight. Test dates, currency, URLs, and headings in the final PDF.
Confirm that the text remains usable
Select a Hindi sentence in the output, copy it into a plain-text editor, and search the PDF for one word from that sentence. A visually correct but image-only PDF will fail these checks. For more detail, read searchable PDF vs image PDF.
