Kashida (Arabic كشيدة) is a type of justification used in some cursive scripts, particularly Arabic. In contrast to white-space justification, which increases the length of a line of text by expanding spaces between words or individual letters, kashida justification is accomplished by elongating characters at certain chosen points. Kashida justification can be combined with white-space justification to various extents.

Kashida can also refer to a character representing this elongation (also known as tatweel), or to one of a set of glyphs of varying lengths that are used to implement this elongation in a font. The Unicode standard assigns codepoint U+0640 as "Arabic Tatweel".

Kashida or Keshida is a Persian word meaning extended or drawn.