All about X81 Files

The X81 file type is primarily associated with GAEB Software.

X81	File extension: X81
	File type:	XML document

What is an X81 file

X81 files mostly belong to GAEB Software. The X81 file is a GAEB German construction tender file that is built on an XML format following the DA81/3.2 standard.
This file holds construction tender data used in the bidding process within the German construction industry. The structure divides project details into clear sections and hierarchies so that each part of a tender – from technical specs to cost information – is organized in the XML.
Key details sourced by FilExt.com include:

Format: XML-based, using the DA81/3.2 tender standard.
Purpose: To exchange construction tender data during project bidding.
Usage: Primarily in Germany’s construction sector for managing tender submissions.
Viewing: Can be opened in any text editor, though using dedicated GAEB tender software is recommended for proper parsing.

For further insights, visit the official GAEB website.
FilExt.com tip: If you have an X81 file, using a specialized XML viewer or a GAEB-compatible application will help you see the data in a structured format suitable for professional review.

How can I open an X81 file?

You need a suitable software like GAEB Software to open an X81 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 X81 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a X81 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online X81 Text Viewer

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Programs that open and convert X81 files:

GAEB Software
See the previous paragraphs to learn more about the main application. X81 files are often referred to as GAEB Software data files because this type of file is primarily created or used by this software.
German construction tender software
The .X81 file extension signifies a file format used for transferring tender data in the German construction industry. These files adhere to the GAEB DA XML 81 standard, a subset of the broader GAEB DA XML schema. Specifically, the .X81 extension denotes that the file contains data conforming to the DA81/3.2 specification within the GAEB XML framework. This structured format facilitates the electronic exchange of information related to tenders, enabling seamless integration between different software applications used by architects, contractors, and other stakeholders involved in construction projects in Germany. This file format is classified as tender data.

X81 file extension format:

A file format defines how the data in the file is structured. Often, the file format can be deduced from the file extension or the initial bytes (called the signature). Nonetheless, different programs can utilize the same file extension to represent distinct file formats. Double-clicking on the file often results in an error when opening. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Our evaluation of the X81 files is as follows:

The X81 file extension is not found very often and mainly uses a special format. However, the following two file formats are common:

98% of all X81 files are associated with GAEB-Format XML files, which internally utilize the well-known XML 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 contain text and words, not binary data. X81 files are between 2 KB and 1 MB in size. It is a modern file type. The files contain the following words: GAEB xmlns, <?xml version="1.0" encoding="UTF-8"?>, GAEBInfo, Version, -- GXML Toolbox V3, <!-- GXML, http://www.gaeb-toolbox.de/, Toolbox V3.3, http://www.gaeb.de/GAEB_DA_XML/DA81/3.2 and VersDate. The file name 2020-06-01-GAEB-Oventrop.x81 is typical for these files. Files like these are sometimes connected to gaeb, oventrop, texte, leistungsverzeichnis, ausschreibungstexte, edelstahl, mapress and agru.

The remaining 2% of all X81 files are files with no common format. Tagged as anlage, rohbau or teil. You can get all the details of your X81 file by dragging it onto this page or by clicking the button "Choose your .x81 file to analyze" above.

Technical Data for X81 File Extension

File classification:

Data

Related files:

da81, x82, x83, gaeb, d81, p81, 81, d83, xml

an x81 XML document is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with X81 files

Associate the X81 file extension with the correct application.
Update your software that should actually open xml documents. Because only the current version supports the latest X81 file format. Search, therefore, e.g. on the manufacturer website after an available GAEB Software update.
To make sure that your X81 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .X81 file online - secure, fast, and no downloads needed.