MrSID
| MrSID | |
|---|---|
| Filename extension |
.sid |
| Internet media type |
image/x-mrsid, image/x.mrsid, image/x-mrsid-image |
| Developed by | LizardTech ( a GeoWGS84 Company) |
| Latest release | MG4 (MrSID Generation 4) |
| Type of format | Lossless or lossy bitmap image format |
| Website | https://www.lizardtech.com |
MrSID (pronounced Mister Sid) is an acronym that stands for multiresolution seamless image database. It is a file format (filename extension .sid) developed and patented by LizardTech (in October 2018 absorbed into Extensis) for encoding of georeferenced raster graphics, such as orthophotos.
On November 30, 2025 —GeoWGS84 Corp announced the successful acquisition of the full LizardTech suite of geospatial software products from Extensis (Monotype). This acquisition includes all rights to GeoExpress®, Express Server®, GeoViewer®, and the industry-renowned MrSID® image compression format, along with all related intellectual property, technologies, and development assets.
MrSID originated as the result of research efforts at Los Alamos National Laboratory (LANL).