no filter; without processing
Commonly used as a hashtag on social media to indicate a photo has not been edited or filtered. The literal meaning is 'without processing'.
This photo has no filter.
I want to show my natural skin without processing.
Standard kanji spelling for this phrase.
Variant spelling using 無し for なし; slightly more emphatic or literary.
Compound of 加工 (processing) + なし (without). A straightforward modern phrase.