RevitLookup 2021

RevitLookup 2021 2021.5.4

Interactive Revit RFA and RVT project database exploration tool to view and navigate BIM element parameters, properties and relationships.

Download for Windows

About RevitLookup 2021

Interactive Revit RFA and RVT project database exploration tool to view and navigate BIM element parameters, properties and relationships.

What's new in 2021.5.4

A new minor release with installer fixes and improvements.
- Improved enumeration performance for categories, phases, and family parameters.
- Deferred the Autodesk Parameters Service members ParameterUtils.DownloadParameter, DownloadCompanyName and DownloadParameterOptions.
- Replaced Serilog with Microsoft.Extensions.Logging.
- Fixed the addin startup under a multi-user installation #438
- Fixed the missing DLL error on installation while Revit is running #464
That's all for now. Next up: CLI, NuGet, MCP tools, and Avalonia UI
Full changelog: 2027.0.3...2027.0.4

Full release notes »

Technical details

PublisherLookup Foundation
AuthorNice3point
Version2021.5.4
Release date2026-09-06
LicenseMIT
Installer typewix
Architecturex64
Package IDLookupFoundation.RevitLookup.2021
Install scopeCurrent user

Install RevitLookup 2021 from the command line

Install with Windows Package Manager
winget install --id=LookupFoundation.RevitLookup.2021 -e
Update to the latest version
winget upgrade --id=LookupFoundation.RevitLookup.2021 -e
Uninstall
winget uninstall --id=LookupFoundation.RevitLookup.2021 -e
Silent install with the offline installer
msiexec /i "RevitLookup-2021.5.4-SingleUser.msi" /quiet /norestart
Uninstall the MSI package
msiexec /x {9B7FD05D-C782-4538-A5D3-04B69A386FE4} /quiet

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RevitLookup 2021 version history

2021.5.3 Jul 5, 2026

On-demand member evaluation
Earlier versions evaluated every member as soon as you opened the RevitLookup window.
That was risky, because RevitLookup would call terminal methods and methods that modify the object without asking, and for large objects you had to wait while hundreds of slow calls ran.
Methods that return void could not be executed at all.
You could see them in the list, but RevitLookup had no way to run them, so you could never invoke one or confirm it worked.
Evaluation now happens on demand #298.
When an object opens, RevitLookup evaluates only the members it considers safe to call, now it's members from System and Autodesk.Revit namespaces.
Everything else is deferred until you ask to evaluate. Opening even heavy objects stays fast, and you decide which expensive or model-changing members actually run #239.
Methods that return void are now runnable too, handled as deferred members like everything else, so you can finally invoke View.Print or similar methods.
To evaluate a deferred member, two new commands were added to the row context menu:
- Evaluate (F8) runs the member.
image
- Evaluate with transaction (Alt + F8) runs the member inside a Revit transaction, which some members require in order to execute. Any changes the member makes are committed to the document.
image
If you hit a member that should be evaluated automatically, or one that should not, please report it in the Discussions for this release.
Readable value states …

2021.5.2 Jun 7, 2026
  • Added Rebar.GetFullGeometryForView support #413.
  • Added WinGet installation method https://github.com/lookup-foundation/RevitLookup/wiki/versions#installation.
  • Changed the "Project website" link to the new Autodesk blog #396.
  • Changed the installer manufacturer from "Autodesk" to "Lookup Foundation".
  • Full changelog: 2027.0.1...2027.0.2
2021.5.1 Apr 10, 2026

- Fixed extensions. CoordinationModelLinkUtils extension is now available starting from Revit 2026.3 patch only. #389
- Fixed the Delete element command using the wrong thread.
- Fixed the visualization buffer for Solid and Mesh geometry.
- Fixed the visualization thread lock for Solid and Mesh geometry.
- Fixed the default visualization solid scale.
Full changelog: 2027.0.0...2027.0.1
RevitLookup versions: https://github.com/lookup-foundation/RevitLookup/wiki/Versions

Frequently asked questions

Is RevitLookup 2021 free?

Yes. RevitLookup 2021 is free and open-source software released under the MIT license.

What is the latest version of RevitLookup 2021?

The latest version is 2021.5.4, released on Sep 6, 2026.

Is it safe to download RevitLookup 2021?

The download button links to the official installer published on github.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with eb679fbf863bc02531de597c1ddfcbdfac1dcf54643731a1aa054046226a6c44.

Which Windows versions does RevitLookup 2021 support?

RevitLookup 2021 runs on Windows and is available for 64-bit (x64) systems.

How do I install RevitLookup 2021 silently?

Run the offline installer with msiexec /i "RevitLookup-2021.5.4-SingleUser.msi" /quiet /norestart, or install it with Windows Package Manager: winget install --id=LookupFoundation.RevitLookup.2021 -e --silent.

How do I uninstall RevitLookup 2021?

Open Settings › Apps › Installed apps, find RevitLookup 2021 and select Uninstall. From the command line, run winget uninstall --id=LookupFoundation.RevitLookup.2021 -e.