Что такое формат файла CPT?
.CPT is a file created by Corel PHOTO-PAINT, the bitmap editing application included in the CorelDRAW Graphics Suite. .cpt files store bitmap image data much like .BMP files do, but go considerably further: a .cpt document can contain multiple objects (layers), masks, alpha channels, transparency settings, embedded objects and effects - and in some versions also the project's undo history.
Exporting .cpt files
Full editing of .cpt files is best done within Corel PHOTO-PAINT itself; third-party tools such as XnView MP can open .cpt files for viewing but may not preserve all layer and effect data. The file can easily be exported to many popular image formats - .JPG, .PNG, .gif or .bmp - using the export feature from the PHOTO-PAINT menu. For maximum compatibility, flattening and exporting to .TIF or .png before sharing is recommended.
Color modes supported in .cpt files
The .cpt format supports the following color modes:
- Black and white (1-bit)
- Greyscale
- RGB (24-bit; up to 48-bit color in later versions)
- CMYK
- LAB
Безопасность и защита
РИСК: MEDIUMA .cpt is image data, not executable, so the file itself poses little direct risk. The real hazard mirrors the CDR ecosystem: searches for free "CPT viewer/opener" lead to abandoned, ad-laden or PUP-bundled downloads. Stick to Corel PHOTO-PAINT or XnView (from xnview.com), or a reputable converter, and avoid no-name "CPT Viewer" executables. Note also that .cpt is reused by encryption tools (CryptaPix) - an encrypted .cpt won't open as an image and shouldn't be forced.
Детали формата
в двух словахПОЛНОЕ НАЗВАНИЕCorel PHOTO-PAINT Imageтакже известен как Corel Photo-Paint bitmap, CPT image
РАЗРАБОТЧИКCorel Corporationс Corel PHOTO-PAINT (early 1990s); proprietary CPT7 since version 7.0 (1997)
КАТЕГОРИЯФайлы растровых изображений
MIME-ТИПapplication/x-corelphotopaint
ТИПProprietary layered raster image (objects, masks, alpha, effects)
Это расширение также используется в…
- Encrypted file (CryptaPix / PGP-style) - Some encryption tools (e.g. CryptaPix) save .cpt as an encrypted image/data file - not a Corel bitmap.
- FileWrangler / generic compressed-template files - A few legacy utilities used .cpt for compressed or template data; niche and unrelated.
MAGIC BYTES · СИГНАТУРА ФАЙЛА
СМЕЩЕНИЕ
0001020304050607
HEX
4350542046494C45
ASCII
CPT FILE
Modern proprietary CPT (v7/8/9) begins with the ASCII tag "CPT FILE". The legacy CPT6 format is essentially a TIFF clone and instead carries a TIFF signature (II*\0 / MM\0*). Distinguish by version: CPT6 = TIFF-like, CPT7+ = "CPT FILE".
Программы, открывающие файлы CPT
Windows3 apps
CorelDRAW
Платно Import the .cpt (PHOTO-PAINT image) into a CorelDRAW document. Same suite as PHOTO-PAINT. 
Corel PHOTO-PAINT (CorelDRAW Graphics Suite)
Платно Open the .cpt directly - the only app that reads every CPT version with full layers/objects. Free trial; otherwise subscription/one-off licence. 
XnView MP
Бесплатно Open the .cpt to view and convert it (handles many CPT files; flattened, not full layer editing). Free for personal use. 
macOS2 apps
XnView MP
Бесплатно Open the .cpt to view and convert it (handles many CPT files; flattened, not full layer editing). Free for personal use.
Corel PHOTO-PAINT (CorelDRAW Graphics Suite)
Платно Open the .cpt directly - the only app that reads every CPT version with full layers/objects. Free trial; otherwise subscription/one-off licence. 
Linux1 app
XnView MP
Бесплатно Open the .cpt to view and convert it (handles many CPT files; flattened, not full layer editing). Free for personal use. Технические подробности
глубокая спецификация| MIME type | application/x-corelphotopaint |
| Magic bytes | ASCII string "CPT FILE" at byte offset 0 (CPT7/8/9); TIFF byte-order marker for the legacy CPT6 format |
| Byte order | Little-endian (CPT7+); CPT6 inherits the TIFF byte-order marker (II for little-endian, MM for big-endian) |
| Container | Proprietary chunked layout (CPT7/8/9); CPT6 uses a TIFF-based container |
| Compression | Lossless RLE/packbits-style internal compression (CPT7+); CPT6 uses standard TIFF compression schemes |
| Internal format versions | Four generations: CPT6 (TIFF-like, pre-v7.0), CPT7 (1997), CPT8 and CPT9 |
| Color depth | 1-bit (B&W), 8-bit grayscale, 24-bit RGB, 32-bit RGBA, 32-bit CMYK; up to 48-bit per channel in later versions |
| Color modes | Black & white, grayscale, RGB, CMYK, LAB |
| Layer model | Multiple independent objects (layers) composited over a background image |
| Mask and alpha support | Per-object masks and alpha channels, plus a global image mask |
| Typical file size | 1 MB to several hundred MB, depending on resolution and object count |
| Platform support | Windows (primary); macOS supported in older versions and recent CorelDRAW Graphics Suite releases |
| Third-party compatibility | XnView MP can open .cpt files for viewing; full round-trip editing requires Corel PHOTO-PAINT |
| Proprietary status | Undocumented proprietary format (CPT7 through CPT9); no public specification exists |
| Выпущен | Corel PHOTO-PAINT (early 1990s); proprietary CPT7 since version 7.0 (1997) |
| Последняя версия | CPT9-era format (used by recent CorelDRAW Graphics Suite releases) |
| Спецификация | www.coreldraw.com |
Конвертации CPT
Возможно
.CPT .JPEGРУКОВОДСТВО
Да - откройте CPT в Corel PHOTO-PAINT или XnView MP, затем экспортируйте как JPEG.
Как конвертировать
.CPT .PNGРУКОВОДСТВО
Да, CPT можно конвертировать в PNG - самый быстрый способ - открыть файл в XnView MP (бесплатно) и…
Как конвертировать
.CPT .TIFFРУКОВОДСТВО
Да, CPT можно конвертировать в TIFF - самый быстрый способ - открыть файл в Corel PHOTO-PAINT и…
Как конвертировать
.CPT .JPGРУКОВОДСТВО
Да, вы можете конвертировать CPT в JPG - откройте файл в Corel PHOTO-PAINT или бесплатном XnView MP, затем…
Как конвертировать
.CPT .BMPРУКОВОДСТВО
Да - откройте файл в Corel PHOTO-PAINT или XnView MP и экспортируйте как BMP.
Как конвертировать
.CPT .PSDРУКОВОДСТВО
Да - откройте CPT в Corel PHOTO-PAINT и экспортируйте его как PSD, чтобы сохранить слои нетронутыми.
Как конвертировать
.CPT .PDFРУКОВОДСТВО
Да - откройте файл в Corel PHOTO-PAINT и используйте File > Publish to PDF.
Как конвертировать
Невозможно
Вопросы и ответы сообщества
спрошено пользователямиВопросов пока нет - станьте первым, кто спросит о файлах CPT.
Часто задаваемые вопросы
What is a .cpt file?
A Corel PHOTO-PAINT image - Corel's layered raster format (its equivalent of Photoshop's PSD), storing objects, masks, alpha channels and effects. It opens best in Corel PHOTO-PAINT.
How do I open a .cpt file without CorelDRAW?
Try XnView (free), which opens and converts many CPT files for viewing. For full layered editing you need Corel PHOTO-PAINT, or ask the sender to export PSD/TIFF/PNG.
How do I convert a .cpt to JPG or PNG?
Open it in Corel PHOTO-PAINT (or XnView) and Export to JPG/PNG. PNG keeps transparency; JPG is smaller for photos. The image is flattened on export.
Can Photoshop open a .cpt file?
Not directly. Photoshop has no CPT importer. Open the .cpt in Corel PHOTO-PAINT and export to PSD or TIFF, which Photoshop reads (PSD keeps layers).
Why is my .cpt file not opening?
It's likely a newer proprietary version (CPT7/8/9) than your tool supports, or it's actually an encrypted .cpt from a different program (e.g. CryptaPix). Use Corel PHOTO-PAINT for the image type, or check who created it.
Is a .cpt the same as a .cdr file?
No. Both are Corel formats, but .cpt is a raster (bitmap) image from PHOTO-PAINT, while .cdr is a vector drawing from CorelDRAW. They open in different apps within the suite.
Ссылки
1Wikipedia - CPT (file format)en.wikipedia.org
2Corel - PHOTO-PAINT product pagewww.coreldraw.com
