What is the AIT file format?
.ait is Adobe Illustrator's template file format, functionally identical to an .ai file in content but with a key behavioral difference: opening an .ait file creates a new untitled document rather than editing the template itself, analogous to how .dotx works for Word documents. This protects the master template from accidental modification.
.ait files are PDF-compatible binary documents. Since Illustrator 9 (2000), both .ai and .ait files use a PDF wrapper (%PDF- header) with a private PGF (Persistent Graphical Format) stream embedded inside. Templates can contain:
- artboard layouts and guides,
- vector paths, shapes, and text frames,
- color swatches, gradients, and spot colors,
- paragraph and character styles,
- symbols, brushes, and graphic styles,
- embedded or linked raster images.
Templates are saved in Illustrator via File → Save as Template and are commonly used for brand identity systems, stationery, print layouts, and marketing materials.
Because .ait files share the same PDF-based structure as .ai files, they can often be opened in compatible vector editors such as Inkscape or CorelDRAW, though private Illustrator data may not round-trip perfectly. Artboard dimensions are capped at approximately 203.2 × 203.2 cm in modern Illustrator.
Security & safety
RISK: LOWAIT is a vector graphics template; no executable code. As a PDF-based format, malformed AIT could theoretically exploit PDF parser vulnerabilities, but this is extremely rare in practice. Download templates only from reputable sources (Adobe Stock, Creative Market).
Format details
in a nutshell- AutoCAD Drawing Template (ATT vs AIT - note: not the same) - Not a real .ait use; included to clarify the extension is Adobe-only in practice.
Programs that open AIT files
Windows4 apps
Adobe Illustrator
Paid Double-click the AIT to open as a new untitled document. File → Open to edit the template itself. 
Inkscape
Open-source File → Open the AIT; Inkscape imports the PDF layer. Most vector content is editable; Illustrator-specific effects may differ. 
macOS3 apps
Linux1 app
Technical details
deep spec| Developer | Adobe Inc. |
| File type | PDF-based vector graphics template for Adobe Illustrator |
| Magic bytes | %PDF- (25 50 44 46 2D), identical to .ai and .pdf files; distinguishable only by file extension |
| MIME type | application/illustrator (also: application/pdf, application/vnd.adobe.illustrator) |
| Container | PDF (ISO 32000) wrapping a private PGF (Persistent Graphical Format) stream with Illustrator-specific data |
| Compression | DEFLATE/FlateDecode for PDF streams; legacy pre-Illustrator 9 files use EPS/PostScript encoding |
| Typical file size | 50 KB - 50 MB (scales with embedded raster images and artboard complexity) |
| Template behavior | Opening creates a new untitled document, leaving the .ait source file unmodified (analogous to .dotx for Word) |
| Save method | File → Save as Template in Adobe Illustrator |
| Artboard maximum | Approximately 5,779.53 × 5,779.53 pt (~203.2 × 203.2 cm) in modern Illustrator |
| Version metadata | Illustrator version stored in embedded XMP metadata under Illustrator:StartupProfile |
| Compatibility | PDF layer renderable in Acrobat/Reader; Inkscape and CorelDRAW can open the vector data with potential loss of Illustrator-private features |
| Released | mid-1990s (Illustrator 6-7 era); PDF-based format since Illustrator 9 (2000) |
| Latest version | Aligns with Adobe Illustrator CC 2024 (version 28) |
| Specification | www.adobe.com |
AIT conversions
Community Q&A
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