also: ビューア · ビューワー · ビューワ · ビュアー · ビュワー · ビュア
noun
Refers to a physical device for viewing film slides, x-rays, or similar media. Not typically used for software.
医者はレントゲンフィルムをビューアーにかざした。
The doctor held the X-ray film up to the viewer.
noun
image viewer; file viewer
Software application for viewing images, documents, or other files. Common in computing contexts.
この画像ビューアーはJPEGとPNGに対応している。
This image viewer supports JPEG and PNG.
Alternate rendering of the 'w' sound; less common but recognized.
Rare variant; combination of alternate 'w' and no long vowel mark.
Rare spelling; uses 'ワ' for the 'w' sound.
Rare spelling; omits both the 'w' sound and the long vowel mark.
ビュー means 'view' as a noun, while ビューアー specifically refers to a device or software for viewing.
Borrowed from English 'viewer'. The multiple katakana spellings reflect variations in how the English sounds are adapted to Japanese.