since 2000
Opening OA Files
The OA file type is primarily associated with OpenAttestation Viewer.
What is an OA file?
OA files mostly belong to OpenAttestation Viewer. Format: It is a JSON file. Usage: It stores digital attestation data. Access: Use a JSON viewer or the dedicated OpenAttestation Viewer to examine its contents.
This file is an OpenAttestation document. Its internal format is JSON, which makes it a text-based file storing attestation data. This OA file holds information that verifies the authenticity and integrity of a document.
You can view this file using the OpenAttestation Viewer. Here are some key points summarized by FilExt.com:
FilExt.com note: For more details, visit the OpenAttestation website.
How to open an OA file
You need a suitable software like OpenAttestation Viewer to open an OA 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 OA file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a OA file directly in the browser:. Just drag the file onto this browser window and drop it.
Online OA Text Viewer
or drag and drop it here
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How to extract texts from OA files or capture a screenshot to PDF, JPG, DOCX, TXT, ...
If you want to extract texts from OA file or capture a screenshot, you can use our free Online OA File Viewer:- Just click the "Choose your .oa file to view" button on this page.
- Your OA file will then be displayed in the browser.
- Now click on "Save as..." at the top of the page.
- Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
- Your file will be converted and downloaded.
Programs that open and convert OA files:
- OpenAttestation Viewer
See the previous paragraphs to learn more about the main application. OA files are often referred to as OpenAttestation Viewer data files because this type of file is primarily created or used by this software.
- OpenAttestation ViewerOpenAttestation files, denoted by the *.oa extension, primarily store verifiable documents, such as certificates and diplomas, using a JSON format. These documents are digitally signed and can be independently verified for authenticity and integrity. They are commonly used for issuing and managing digital credentials in various contexts, including education, professional certifications, and identity verification. This file format is classified as Document.
Technical Data for OA File Extension
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: NeroPhotoSnapViewer.Files
EXEFile: %ProgramFiles%\Ahead\Nero PhotoSnap\PhotoSnapViewer.exe %1
EXEFile: %ProgramFiles%\Ahead\Nero PhotoSnap\PhotoSnapViewer.exe %1
an oa document is a special file format and should only be edited and saved with the appropriate software.
How to solve problems with OA files
- Associate the OA file extension with the correct application.
- Update your software that should actually open documents. Because only the current version supports the latest OA file format. Search, therefore, e.g. on the manufacturer website after an available OpenAttestation Viewer update.
- To make sure that your OA file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
- Click here to open your .OA file online - secure, fast, and no downloads needed.