JPG to SGI

Upload a JPG file and download it as SGI. Free to start.

Drop files here, or press Enter to choose them. Up to 50 MB per file.
Drop a JPG file hereFree · up to 50 MB · 10 operations in total without an account · or paste with Ctrl+V
  • Sent over HTTPS · link expires in 24 h

How it works

  1. Step 1:

    Drop the JPG file on the orange block above, or press “Choose JPG”.

  2. Step 2:

    Press “Convert to SGI”. The block shows the progress while the server converts the file.

  3. Step 3:

    Press “Download” to save the SGI file. On Free the link works for 24 hours.

How JPG to SGI conversion works

JPG is an image format: it uses lossy DCT compression that permanently discards fine pixel detail to achieve small file sizes, ideal for photographs. SGI is a document format that stores data in the SGI format. This embeds the raster image inside a document container, fixing its dimensions on the page. Metadata such as creation date is preserved where the target format supports it; features the target format cannot represent are dropped. Converting between these two formats is common when the source application does not support SGI natively or when the target platform only accepts SGI. 1converter processes this conversion server-side using open-source tools. Files are transferred over HTTPS, converted on secure cloud servers, and returned through a private download link that expires after 24 hours on Free.

Sources and specifications

Quality levels for JPG → SGI

LevelFile sizeSpeed
Low qualitySmallest file, basic qualityVery smallVery fast
Medium qualityRecommendedBalanced size and qualityMediumFast
High qualityLarger file, great qualityLargeModerate
Maximum qualityLargest file, best possible qualityVery largeSlow

Image Tip: For photos, Medium quality offers the best balance. For graphics with text or sharp edges, use High or Maximum quality to preserve clarity.

When to convert

What the SGI file is good for and why people convert to it.

  • Converts 8-bit JPEG pixels into SGI raster files for legacy graphics pipelines
  • Keeps the same image dimensions when exporting to SGI
  • Preparing images for older SGI visualization software that only reads SGI raster
  • Building test assets for rendering pipelines expecting .sgi inputs

Where your file goes

  • It travels to our server over an encrypted HTTPS connection and is converted there.
  • The SGI file comes back as a private link. It stops working after 24 hours on Free and 7 days on paid plans, and then the files are deleted.
  • Want the file to stay on your device? Private Mode converts images right in the browser. Open Private Mode

Questions and answers

What people ask before converting JPG to SGI.

Ask supportAll questions
Does converting JPG to SGI remove JPEG compression artifacts?
No—SGI will be generated from the already-decoded JPEG pixels, so any JPEG block artifacts remain. The conversion changes the container/encoding, not the original capture quality.
Will the JPG’s size and aspect ratio be preserved in SGI?
Yes, the converter should keep the same pixel dimensions and aspect ratio as the decoded JPG. Only the file format/container changes to SGI.
Is SGI more editable than JPG?
SGI can be easier to handle in pipelines that expect SGI raster data, but it is not inherently “lossless” relative to the original scene. It stores raster pixels in an SGI format; edits depend on the target software.
What compatibility should I expect after conversion?
The output is intended for SGI-compatible tools and workflows that read .sgi raster files. Regular web browsers typically won’t display SGI directly, unlike JPG.

Many files at once? Starter converts 5 at a time, 100 a day.

See plans