Opening an ACORN File

The ACORN file type is primarily associated with Acorn.

ACORNFile Extension ACORN
 File extension: ACORN
File type:  Image

What is an ACORN file

ACORN files mostly belong to Acorn by Apple Inc. Acorn is a graphics program for the Macintosh. Designed for simple editing, Acorn features flood fill, gradients, vector shapes, drawing and erasing tools, and more. It also includes chaining filters and easy image and canvas resizing.

How to open ACORN files

You need a suitable software like Acorn to open an ACORN file. You need a suitable software like Acorn from Apple Inc. to open an ACORN file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your ACORN file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a ACORN file directly in the browser:. Just drag the file onto this browser window and drop it.

Online ACORN File Viewer

Choose your .acorn file to view this image
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How to convert ACORN files to JPG, PDF, HTML, DOC, ...

If you want to convert or edit an ACORN file, you can use our free Online ACORN File Converter (powered by Convert.Guru):
  1. To do this, click the button "Choose your .acorn file to view this image" on this page.
  2. After your file is opened in browser,
  3. click "Save as..." in the menu.
  4. Then click the file format (e.g. PDF, JPG, DOCX, TXT, ...) you want.
  5. Download the converted file.

Can't Open Your .ACORN File? Try These Steps

Because .ACORN files come from various programs, they aren't universally openable.

  1. Identify the Source: Files received from graphic designers or macOS workflows are often image projects.
  2. Check the Header: Inspect the first bytes in a hex viewer or text editor:
    • "PK" indicates a zipped archive package.
    • "bplist" suggests an Apple binary property list.
    • Readable XML/JSON points to structured metadata.
  3. Use the Original Software: The original program is usually required; try Acorn (by Apple Inc.), Apple Preview, or ask the sender.
  4. Use this Webpage: Drag and drop your file into our viewer to detect the format, extract readable text or metadata, and preview contents when possible.

Technical Data for ACORN File Extension

File classification:
Graphic
Related files:
arm, sqlite, spk, aof, qtif
Mime type:
image/x-riscos-sprite

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: GraphicsConverterPro.acorn, FileType: Acorn Sprite, AppName: GraphicsConverter-reg
EXEFile: GraphicsConverter.exe
ProgramID: XnView.Image
EXEFile: %ProgramFiles%\XnView\xnview.exe %1

an acorn Image is a special file format by Apple Inc. and should only be edited and saved with the appropriate software.

How to solve problems with ACORN files

  • Associate the ACORN file extension with the correct application.
  • Update your software that should actually open images. Because only the current version supports the latest ACORN file format. Search, therefore, e.g. on the Apple Inc. manufacturer website after an available Acorn update.
  • To make sure that your ACORN file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
  • Click here to open your .ACORN file online - secure, fast, and no downloads needed.
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