How to view a .SPJ file online
No app, no account, no upload.
Open your .SPJ
Drag a .SPJ file onto the viewer, paste one with Ctrl+V, or choose it from your device.
View and inspect
Zoom in close, pan around, rotate or flip it, and read the exact color of any pixel.
Save a copy
Download it as PNG, JPG or WEBP with your rotation applied, at the quality you choose.
What is a .SPJ file?
Everything worth knowing about Image Composite Editor Panorama Project.
An SPJ file is a project file from Microsoft Image Composite Editor (ICE), a free panorama-stitching tool from Microsoft Research. It stores your source photo list and stitching settings; the finished panorama is exported separately as JPEG, TIFF, or PNG. Open it in ICE if you still have it installed. Microsoft discontinued ICE and removed the official download.
Programs that open .SPJ files
- Windows
- Hugin (free replacement), Microsoft Image Composite Editor (ICE), PTGui (replacement for the source photos)
- macOS
- Hugin
- Linux
- Hugin
| Full name | Image Composite Editor Panorama Project |
|---|---|
| Developer | Microsoft Research (Computational Photography group) |
| First released | 2008 (Microsoft Image Composite Editor / ICE) |
| Category | Images |
| MIME type | application/octet-stream |
Related tools
More free tools for working with images.
Frequently asked questions
Is my .SPJ file uploaded to a server?
No. The viewer decodes your .SPJ file with your browser's own image engine. Closing the tab removes it completely.
How do I open PSD, TIFF, RAW or HEIC files?
HEIC and HEIF (iPhone photos) open right here — we decode them with libheif. PSD, TIFF, JPEG 2000, camera RAW, HDR and texture files have their own viewers, linked above; the Image Viewer sends you to the right one automatically.
What does the Photo details panel show?
The EXIF data your camera or phone saved in the photo: camera and lens, shutter speed, aperture, ISO, the date it was taken and, if location was on, where. Files you save from this viewer don't include this data, which is handy when you share photos.
Is there a file size limit?
There's no fixed limit; it depends on available memory. Very large images (over 40 megapixels) are previewed at reduced resolution so the viewer stays fast, but the reported dimensions are always the original ones.
How does the color picker work?
Point at any pixel to see its HEX and RGB value with a magnified view of the surrounding pixels. Click to copy the HEX code and save it to your palette.
Should I save as PNG, JPG or WEBP?
PNG keeps every pixel and transparency, which is best for screenshots and graphics. JPG makes photos small. WEBP is usually the smallest of all and works in every modern browser.
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