Opening CPD Files

The CPD file type is primarily associated with RoboHelp.

CPD	File extension: CPD
	File type:	project database cache

What is a CPD file

CPD files mostly belong to RoboHelp by Adobe. CPD filename extension is associated with comic files created with Manga Maker ComiPo!, a 3D comic book illustration software. Such a CPD file may contain raster graphics, brush strokes, and settings applied to multiple layers that make up a comic book scene or character. RoboHelp, a software for creating documentation, help, and knowledge base content saves its project database cache in a in a database file that has CPD filename extension. Although this file is used by RoboHelp, it is actually an Access 97 database file. Information stored in a CPD cache database may include folder lists, font sets, hyperlinks, keywords, stylesheets and other assets that are frequently changed in a project. Some CPD files are compiled printer descriptors used by SmartWare. PrintOffice, a discontinued desktop publishing software saved drawings in CPD files. PhotoDefiner Editor also stored highly compressed raster images in CPD files.

How can I open a CPD file?

You need a suitable software like RoboHelp to open a CPD 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 CPD file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a CPD file directly in the browser:. Just drag the file onto this browser window and drop it.

Online CPD Text Viewer

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Programs that open and convert CPD files:

RoboHelp by Adobe
See the previous paragraphs to learn more about the main application. CPD files are often referred to as RoboHelp data files because this type of file is primarily created or used by this software.
Canon MB/iB Printers (printer data) by Canon
MB and iB series printers manufactured by Canon use data stored in a CPD binary file. This file format is classified as Data.
Complaints Desk
CONTENTdm (compound object) by OCLC
CONTENTdm is an online, web hosting platform for building and showcasing collections on websites. It saves compound objects in XML-based CPD files. This file format is classified as Developer.
HALCON (standard calibration plate description) by MVTec
HALCON is an integrated development environment used for the rapid development of machine vision and image analysis digital products. The description of the standard calibration plate used to calibrate cameras linked to HALCON are saved in CPD files. This file format is classified as Settings.
Manga Maker ComiPo! (comic) by Web Technology
Manga Maker ComiPo! is a comic book authoring software that is popular in Japan. A comic created with this program is stored in a CPD file that can be exported as a JPEG, PNG, or PDF file. This file format is classified as Raster Image.
Photo Viewer (fax coversheet) by Microsoft
Photo Viewer (formerly Photo and Fax Viewer) is an image viewer distributed as part of Windows operating system. Fax documents received via fax machines connected to an older Windows workstation can be viewed with this program. Fax coversheets are stored in CPD files. This file format is classified as Raster Image.
PrintOffice (drawing) by Corel
PrintOffice is a discontinued graphics editor previously distributed as part of CorelDRAW. Drawings created with PrintOffice were saved in CPD files. This file format is classified as Raster Image.

CPD file extension format:

To find out what program is needed to open CPD files, you need to determine the file format. The initial characters of a file are called signature, sometimes also referred to as "magic bytes". The signature can be used to infer the file format. Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. When there is a problem with a file, the first step to solving it is to determine the file format. Our evaluation of the CPD files is as follows:

The file type with the extension 'CPD' has no uniform or dominant file format. But the following two file formats are common:

10% of all CPD files are based on the well-known XML file format. The Extensible Markup Language (XML) is a simple text-based format for representing structured information: documents, webpages, data, configuration, books, transactions, invoices, and much more. XML defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. These files are plain text, which means they can be viewed with any text editor such as Windows Editor, Nano for Linux, and TextEdit for macOS. The files are often between 640 bytes and 32 KB in size. Certain words are almost always found in the files, such as <?xml version="1.0" encoding="utf-8"?>, <cpd>, <page>, pagefile, pageptr, <pagetitle>Page 1</pagetitle>, <type>Document-PDF</type>, pdfpage and <type>Document</type>. Such CPD files store data about trojan and daily, and often consist of personal data.
6% of all CPD files use the same file format, which have the signature # Plate Description Version 3. The contents of these files are easily readable with a text editor. The file size is in the range of 13 KB to 52 KB. The keywords # Plate Description Version 3, # used for the camera calibration in HALCON, HALCON Version, # Description of the standard calibration plate, create, generated and HALCON Version 12 are typical for these files. calplate_80mm.cpd is a typical file name. These files can be linked to calplate.

All other CPD files (84%) have no consistent format, often, for example, ZIP, RIFF, KrI, KpW, Mjf, Upper and Character. The category is service, manual, series, data, pirates, ninjas, usbcpd or debug. If you want to find out what your CPD file contains, drag and drop it onto this page.

Technical Data for CPD File Extension

File classification:

Data

Related files:

cdp, cdpresource, zip, pcd, cbd, jpg, pdf, cpg, dbc, wmz, indd, eps, svg

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: FaxCover.Document, FileType: Cover Page Editor Document, AppName: Fax Cover Page Editor for Windows95
EXEFile: FaxCover.exe

ProgramID: FaxCover.Document, FileType: Fax Cover Page, AppName: Microsoft Fax Cover Page Editor
EXEFile: fxscover.exe

a cpd project database cache is a special file format by Adobe and should only be edited and saved with the appropriate software.

How to solve problems with CPD files

Associate the CPD file extension with the correct application.
Update your software that should actually open project database caches. Because only the current version supports the latest CPD file format. Search, therefore, e.g. on the Adobe manufacturer website after an available RoboHelp update.
To make sure that your CPD file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
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