An .ai file is an Adobe Illustrator document. The good news: Illustrator saves a full PDF copy inside most .ai files by default (the "Create PDF Compatible File" option), so many apps can show it without Illustrator. Here are five options and what each one can and can't do. (We make Xiaoer Omia (xiaoeromia.com), option 4 — the others are described as fairly as we can.)
Last checked: October 2026
The program that made the file. It opens every layer, artboard and effect, and can save the artwork as PDF, PNG, JPG or SVG.
Open the .ai with Preview (right-click, Open With) or with Adobe Acrobat Reader. If that doesn't work, rename a copy from .ai to .pdf and open it again.
A free, open-source vector editor. It imports a PDF-compatible .ai like a PDF, so you can see and change the paths.
Xiaoer Omia (xiaoeromia.com) is a viewer for Mac and Windows. Double-click the .ai and the artwork appears, sharp at any zoom. Save As gives you one PNG per page in a .zip, or the text as plain text or Markdown. Nothing is uploaded.
Websites, including Adobe's own AI-to-PDF tool, turn an .ai into a PDF or image in the browser.
| Mac | Windows | Needs PDF-compatible .ai | Works offline | Cost | |
|---|---|---|---|---|---|
| Illustrator | Yes | Yes | No | Yes | Subscription |
| Preview / Acrobat Reader | Yes | Acrobat Reader | Yes | Yes | Free |
| Inkscape | Yes | Yes | Yes | Yes | Free |
| Xiaoer Omia | Yes | Yes | Yes | Yes | Free to view |
| Online converters | In the browser | In the browser | Varies | No, file is uploaded | Often free |

Most .ai files contain a PDF copy, so a PDF reader can show them: Preview on a Mac, Acrobat Reader, or a viewer such as Xiaoer Omia (xiaoeromia.com) on Mac and Windows. To edit the vectors for free, use Inkscape.
It was probably saved with "Create PDF Compatible File" turned off, or it's a very old PostScript-based file. Only Illustrator can open those. Ask the sender to re-save it with PDF compatibility on, or to export a PDF.
Often, yes. If the file was saved PDF compatible, renaming a copy to .pdf lets any PDF reader open it. You can view it but not edit the Illustrator layers.
In Xiaoer Omia, open the .ai and use Save As, Per-page PNG (.zip): you get one PNG per page. To get a JPG, open that PNG in Xiaoer Omia and Save As JPG. Inkscape can also export PNG.
If the file is PDF compatible, renaming a copy to .pdf already gives you a PDF. Illustrator can save a clean PDF, and online converters can too, but they upload the file.
Viewing .ai files is free, with no account. Converting uses one of 5 free conversions; after that it's a one-time $19.90 licence, no subscription.
Related: AI file viewer · How to open a PSD file · SVG viewer · PDF viewer · 150+ formats in one app