noun
batch conversion
Computing term for converting multiple files, data formats, or items at once in a single automated process.
画像ファイルを一括変換してJPEGに統一した。
I batch-converted the image files and unified them into JPEG.
一括処理 is batch processing in general, while 一括変換 specifically refers to converting formats or data.
Compound of 一括 (batch, lump) and 変換 (conversion).