Opening a BLD File

The BLD file type is primarily associated with 3D Home Architect.

BLD	File extension: BLD
	File type:	project file

What is a BLD file

BLD files mostly belong to 3D Home Architect by Brøderbund Software. BLD file format is used as a Building Project File by the Building Information Modeling (BIM) program, Envisioneer.

Main Use: Envisioneer software can be used by professional and home users for designing and modifying building designs that are saved as BLD project files. These BLD files contain data referring to other standard 2D and 3D structures used in building such as framing elements, roof styles, furnitures templates, lighting effects and room designs. Apart from storing building design data, BLD files can also be used in specification of building materials. BLD files are also useful in validating the specifications and visualising the concept design of the building before approval and actual construction. Envisioneer application can also be used in development of building documents with the BLD file extension which can then be exported in DWG file format to enable accessibility by other CAD software such as AutoCAD, Draftsight and IntelliCAD.
Other Uses: BLD files can also refer to building script files used by the 3D building simulator software called Skyscraper Simulator. Apart from the data description concerning the appearance of the building, these BLD files also contain details about the name, designer, location, version as well as camera floor, position, and rotation of the building.

How to open BLD files

You need a suitable software like 3D Home Architect to open a BLD 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 BLD file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a BLD file directly in the browser:. Just drag the file onto this browser window and drop it.

Online BLD File Viewer

Choose your .bld file to view this image

or drag and drop it here

Online File Viewer

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Easily convert BLD files to OBJ, STL, PLY, 3DS, FBX, STP, ...

If you want to convert or edit a BLD file, you can use our free Online BLD File Converter (powered by Convert.Guru):

To do so, click the "Choose your .bld file to view this image" button above.
After your file is opened in browser,
click "Save as..." in the menu.
Then select the 3D format (e.g. STL, OBJ, 3DS, X, X3D, STP, PLY, ...) you want.
Download the converted file.

Programs that open and convert BLD files:

3D Home Architect by Brøderbund Software
See the previous paragraphs to learn more about the main application. BLD files are often referred to as 3D Home Architect 3d images because this type of file is primarily created or used by this software.
ACT! (internal working file) by The Sage Group
The file extension BLD is associated with ACT!, a customer management solution. The file contains data that is used for the internal workings of the program. The file may have a DOS extension. This file format is classified as Data. Related links: Act! Wikipedia page
Developer Studio MAK by Microsoft Corporation
EnergyPro (internal working file) by EnergySoft
The extension BLD is that of files associated with EnergyPro, a program to analyze and create reports of a building's energy use. The file contains data pertaining to internal purposes of the program. This file format is classified as Data. Related links: BLD file info
Envisioneer (3D/2D model file) by Cadsoft
Cadsoft creates home design software for builders, designers, remodelers, architects, drafters and consumers.Envisioneer is one such Building Information Modeling (BIM) program created by Cadsoft. The file extension BLD is that of the file containing the 2D and 3D model of objects inside a building. This file format is classified as CAD. Related links: Envisioneer Express Free Viewer
HGTV (icon file) by Home Design Software
A set of landscaping and home designing software programs under the name HGTV gives you the ease of designing your own landscape and home. The extension BLD is associated with this program and most probably belongs to icon files created using these set of programs. This file format is classified as Settings.
My Personal Programmer (project file) by MPact Technologies
My Personal Programmer lets users without any experience in programming to design and build applications without learning a programming language. The extension BLD belongs to the project files created by this program. This file format is classified as Configuration. Related links: My Personal Programmer info
QuickBASIC (various data file) by Microsoft
QuickBASIC is an Integrated Development Environment - (IDE) and compiler for BASIC. The extension BLD is that of the files associated with this program and is used to save a block of binary data and also to load raw pixel data onto the screen. This file format is classified as Data. Related links: QuickBASIC Wikipedia page
RealFlight (aeroplane description file) by Knife Edge Software
RealFlight is a Radio Controlled(RC) flight simulator. The file extension BLD is associated with RealFlight and contains settings of the aeroplane's radio control device. This file format is classified as Game. Related links: RealFlight Wikipedia page
SimCity (saved building file) by Electronic Arts
The extension BLD is associated with SimCity, a city building computer game.The file carrying the extension BLD contains the saved buildings created using the game. This file format is classified as Game. Related links: SimCity Wikipedia page
VersaPro (program block file) by Emerson Automation
VersaPro is a PLC (Programming Logic Controller) software. The extension BLD is that of the file consisting of the program's block building information. This file format is classified as Developer. Related links: VersaPro Documentation
Visual Build (project file) by Kinook Software
Visual Build is a tool that helps developers to create an automated, repeatable process for building and deploying software. The file extension BLD is that of the file storing projects created by Visual Build. This file format is classified as Data. Related links: Visual Build Wikipedia page
Weinberger Picture Sequence
Related links: Edit with FalCon eXtra
XnView MP (image file) by Pierre-Emmanuel Gougelet
The extension BLD is associated with the now obsolete MegaPaint. Files with extension BLD and created using MegaPaint can be viewed using XnView. This file format is classified as Raster Image. Related links: XnView Wikipedia page
Yoot Tower (game progress file) by Sega
Yoot Tower is a building simulator game that lets players construct towers in simulations of exotic locations. The file that saves the progress of a player in this game comes with an extension BLD. This file format is classified as Game. Related links: Yoot Tower Wikipedia page, Yoot Saito (Game developer Wikipedia page

BLD file extension format:

If you can determine the file format, the associated program can also be determined. A file format is determined by the file extension and signature, so JPEG images have the extension .jpg and the first bytes in the file are ÿØÿ. However, different programs can use the same file extension, and file extensions can be assigned incorrectly. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Our analysis of the BLD files produces the following result:

An BLD file includes different formats for the applicable programs. But the following two file formats are common:

45% of all BLD files utilize the Microsoft Compound File format, also known as Composite Document File format or OLE2 compound document format. This general-purpose file format provides a file-system-like structure within a file for the storage of arbitrary, application-specific streams of data. The file signature of compound files is defined as D0 CF 11 E0 A1 B1 1A E1, so the first character of a file looks like "DOCFILE". The internal containers are called MainStream, AllCamsBitmapStream, Worksheet_main_stream and Worksheet_resource_stream. The file size is in the range of 400 KB to 3 MB. The file type was developed 10 years ago and is still in use today. Such BLD files store data about project, house, home, basement, plan, garage and floor.
6% of all BLD files belong to Skyscraper simulator Building script. These files contain text and words, not binary data. Most of these files are 2 KB to 390 KB in size. The keywords name, state and Enter are typical for these files. Files like these are about another.

All other BLD files (49%) have no uniform format, the following 5 formats can be found: Madagascar, .NET and FVE. They are often associated with bloody, locker, building, option or level. You can get all the details of your BLD file by dragging it onto this page or by clicking the button "Choose your .bld file to view this image" above.

Technical Data for BLD File Extension

File classification:

3D Image

Related files:

bid, bdl, bkp, webp, png, grid, zip, blp, skf, exe, arc, txt, blend, pl1, pl2

Mime type:

text/plain, application/octet-stream

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: GraphicsConverterPro.bld, FileType: MegaPaint, AppName: GraphicsConverter-reg
EXEFile: GraphicsConverter.exe

ProgramID: XnView.Image
EXEFile: %ProgramFiles%\XnView\xnview.exe %1

ProgramID: SC3BATBuildingFile
EXEFile: %ProgramFiles%\Maxis\SimCity 3000 Unlimited\Apps\BAApp.EXE %1

ProgramID: bldfile
EXEFile: %ProgramFiles%\Broderbund\3D Home Architect 5.0\Bin\3DHome.exe

ProgramID: bldfile
EXEFile: %ProgramFiles%\3D Home Architect\Home Design SE 6\Bin\3DHASE60.exe

ProgramID: bldfile
EXEFile: %ProgramFiles%\3D Home Architect\Home Design Deluxe 6\Bin\3DHA60.exe

ProgramID: bldfile
EXEFile: %ProgramFiles%\3D Home Architect\Kitchen and Bath Design\Bin\3DHKBD70.exe

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a bld project file is a special file format by Brøderbund Software and should only be edited and saved with the appropriate software.

How to solve problems with BLD files

Associate the BLD file extension with the correct application.
Update your software that should actually open project files. Because only the current version supports the latest BLD file format. Search, therefore, e.g. on the Brøderbund Software manufacturer website after an available 3D Home Architect update.
To make sure that your BLD file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .BLD file online - secure, fast, and no downloads needed.