| .J | Oracle Corporation | 開發商檔案 | Java Source File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .J2K | Joint Photographic Experts Group | 光柵圖像檔案 | JPEG 2000 Image | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .JFI | Joint Photographic Experts Group | 光柵圖像檔案 | JPEG File Interchange Image | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .JIF | Joint Photographic Experts Group | 光柵圖像檔案 | JPEG Image | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .JP2 | Joint Photographic Experts Group | 光柵圖像檔案 | JPEG 2000 Core Image File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .JPC | Joint Photographic Experts Group | 光柵圖像檔案 | JPEG 2000 Code Stream File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .JPEG | Joint Photographic Experts Group | 光柵圖像檔案 | JPEG Image | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .JPF | Joint Photographic Experts Group | 光柵圖像檔案 | JPEG 2000 Image | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .JPG | Joint Photographic Experts Group | 光柵圖像檔案 | JPEG Image | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .JPG2 | Joint Photographic Experts Group | 光柵圖像檔案 | JPEG 2000 Image | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .JPX | Embarcadero Technologies | 開發商檔案 | JBuilder Project | Adobe Photoshop Elements | Adobe Systems Incorporated |
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