.PSD File Extension Reference
PSD (Photoshop Document) is the proprietary default file format used by Adobe Photoshop. It stores multi-layered image compositions, vector artwork, adjustment layers, transparency masks, text annotations, and color profiles.
Quick Specification & Metadata
.PSD
Images
image/vnd.adobe.photoshop
Adobe Inc.
1990
Proprietary / Patent Licensed
Binary Header Data
20 MB – 850 MB
Online .PSD Viewer & Live Inspector
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What is a .PSD File? (Technical Definition & Architecture)
PSD (Photoshop Document) is the proprietary default file format used by Adobe Photoshop. It stores multi-layered image compositions, vector artwork, adjustment layers, transparency masks, text annotations, and color profiles.
Optimized raster or vector algorithms designed for digital rendering and photo encoding.
Encapsulates color matrices preserving natural contrast and tonal distribution.
Enables layered compositing, icon cutouts, and transparent website assets.
PSD Binary Structure & Header Specifications
The .PSD format organizes data into validated sequential or hierarchical byte structures. Inspecting the header offset reveals the magic byte sequence 38 42 50 53 00 01 (8BPS).
- File Signature (Magic Bytes): 38 42 50 53 00 01 (8BPS)
- MIME Content-Type: image/vnd.adobe.photoshop
- Payload Structure: Optimized data stream with metadata headers and checksum records.
- Safety Classification: Low Risk – Non-executable graphic project file. Low security risk unless paired with external linked scripts.
How to Open .PSD Files on Windows, Mac & Android
- 1Primary Application: Double-click or open directly with Adobe Photoshop 2024.
- 2Alternative Software: Open using Photopea Online Editor.
- 3File Association: Right-click the file, select Open with > Choose another app, and check Always use this app.
- 1Native macOS Application: Open with Adobe Photoshop 2024.
- 2Quick Look Preview: Highlight the file in Finder and tap the Spacebar.
- 3Set Default App: Press Cmd + I, expand Open with, select your application, and click Change All.
- 1Compatible Mobile Apps: Download a dedicated viewer for .psd from the Google Play Store.
- 2Cloud Storage: Open through Google Drive, Dropbox, or OneDrive mobile apps.
- 3Online Browser Conversion: Use AnyFileX mobile browser tools to convert the file into universal PDF or image formats.
Convert .PSD Files Online & Free
Convert your .PSD files directly into standardized .TIFF format with high precision and zero privacy compromises.
Export .PSD files to .PDF for universal cross-platform viewing, printing, and sharing.
.PSD MIME Types & HTTP Server Headers
When serving .psd files over HTTP or configuring REST APIs, web servers must send the official IANA registered Content-Type headers:
| MIME Type Identifier | Standard Usage | File Extensions | Copy |
|---|---|---|---|
| image/vnd.adobe.photoshop | Standard official MIME type for .psd files | .psd |
# Nginx mime.types
types {
image/vnd.adobe.photoshop psd;
}
# Apache .htaccess
AddType image/vnd.adobe.photoshop .psd.PSD Magic Bytes & Hex File Signatures
In digital forensics and file signature analysis, authentic .psd files begin with a standardized magic byte sequence at byte offset 0x00 to verify file integrity and prevent extension spoofing:
Offset 0x0038 42 50 53 008BPS........Images File Format.PSD vs .TIFF (Detailed Format Comparison)
| Feature Metric | .PSD | .TIFF | Advantage |
|---|---|---|---|
| Format Full Name | Adobe Photoshop Document | Tagged Image File Format | Tie / Equal |
| Category | Images | Images | Tie / Equal |
| MIME Content-Type | image/vnd.adobe.photoshop | image/tiff | Tie / Equal |
| Binary Header (Magic Bytes) | 38 42 50 53 00 01 (8BPS) | 49 49 2A 00 (Little Endian) or 4D 4D 00 2A (Big Endian) | Tie / Equal |
| Typical Storage Footprint | 20 MB – 850 MB | 25 MB – 250 MB | Tie / Equal |
| Universal Native Support | High / OS Standard | High / OS Standard | Tie / Equal |
.PSD Compatibility Matrix
Supported natively or through Adobe Photoshop 2024
Supported natively or via Photopea Online Editor
Supported via open-source tools and command line utilities
Accessible through compatible mobile viewers or cloud previewers
Supported through dedicated mobile apps or cloud viewers
Accessible via web browser applications and Chrome extensions
Recommended Software for .PSD
Adobe Photoshop 2024
Adobe Inc.
Photopea Online Editor
Ivan Kutskir
GIMP
GIMP Team
Paint.NET (with Plugin)
dotPDN LLC
Affinity Photo 2
Serif Ltd
Common Errors & Troubleshooting .PSD Files
Security & Malware Risk Assessment
Can a .PSD file carry viruses or malware?
Non-executable graphic project file. Low security risk unless paired with external linked scripts.
No active macro execution support
Safe to inspect with AnyFileX's browser sandbox
- •Verify file extension in OS File Explorer options ('Show known file extensions').
- •Verify magic bytes (38 42 50 53 00 01 (8BPS)) to ensure the file isn't a renamed executable.
- •Do not open .PSD attachments received unexpectedly via email or instant messenger.
Preguntas frecuentes
Respuestas claras a las preguntas más habituales.
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