SSI Converter

Convert SSI files online for free


Drop or upload your .SSI file
✈

How to convert your SSI file

  1. Click the "Select File" button above, and choose your SSI file.
  2. You'll see a preview.
  3. Click the "Convert file to..." button to save your file in the format you want.

Convert SSI to another file type

The converter easily converts your SSI file to various formats - free and online. No Visual Studio Code or extra software needed.

  • SSI to JS
  • SSI to TS
  • SSI to PY
  • SSI to JAVA
  • SSI to CPP
  • SSI to C
  • SSI to CS
  • SSI to PHP
  • SSI to RB
  • SSI to GO
  • SSI to RS
  • SSI to SWIFT

Convert a file to SSI

The converter also works in reverse, so you can convert other Raster Image formats to SSI with high quality output.

  • SH to SSI
  • PY to SSI
  • KT to SSI
  • PS1 to SSI
  • SWIFT to SSI
  • LUA to SSI
  • PL to SSI
  • JAVA to SSI
  • SCALA to SSI
  • JS to SSI
  • VBS to SSI
  • TS to SSI

About SSI files

The .ssi extension is famously ambiguous, primarily serving two completely different industries: Architecture and Web Development.

First, and most commonly in file volume (approx. 49%), an .ssi file is a proprietary bitmap image associated with Nemetschek Allplan CAD projects. These are often technically standard JFIF (JPEG) images masquerading with a different extension to link specifically to project metadata. The biggest obstacle here is that standard image viewers like Microsoft Photos or Apple Preview will not recognize the extension, leaving you unable to preview project assets without launching the heavy Allplan environment. For accessibility, these should be converted to standard JPG or PNG files.

Secondly, the extension stands for Server Side Include, a legacy web development technique used to insert content (like headers or footers) into multiple HTML pages dynamically. These are plain text files containing HTML fragments and sometimes script commands processed by the web server (like Apache). If you try to open these directly in a web browser like Chrome or Firefox, they will not render correctly because the browser expects a full page, not a fragment, and cannot execute the server-side directives locally. To view or edit the code, you must treat them as text or convert them to TXT or HTML (though they may still look broken without the parent page).

Less frequently, .ssi files are encrypted user profile data for legacy chat software or survey definitions for Sawtooth Software. These are binary data blobs and are generally not convertible to human-readable formats without the original software.

Use Convert.Guru to open and convert your SSI file.

Users also converted SII, SHIPPERLABEL, LOGO and THUMBNAIL files.



The SSI Converter Story

The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our SSI converter.