There are many different ways to say "it's nothing," depending on the context and the tone of the conversation. Some synonyms for this phrase might include "don't worry about it," "no big deal," "it's all good," "nothing to fret over," or "not a problem." Other possible expressions might include "it's fine," "never mind," "it's insignificant," "nothing to concern yourself with," or "no need to make a fuss." Ultimately, the best way to convey the idea of "it's nothing" will depend on the situation and the speaker's personal style or preference.