Install VST3 support in OBS without guessing where files go.
For most users, the Windows installer is the right choice. It installs the native OBS filter, isolated VST3 host helper and scanner into the OBS root you choose.
1. Close OBS Studio
Close OBS before installing or updating the plug-in. This prevents Windows from keeping an older OBS plug-in DLL locked in memory.
2. Download the official installer
Open the official GitHub release and download:
The same release also contains a portable ZIP and SHA256SUMS.txt.
3. Select the real OBS root folder
The installer asks for the OBS root. Choose the folder that contains:
This works for a normal OBS installation as well as validated custom or portable OBS roots. The installer remembers the validated location for later updates.
4. Start OBS and add the VST3 filter
- Open the audio source you want to process.
- Open Filters.
- Press +.
- Choose VST 3.x Plug-in.
5. Choose a plug-in
In the filter properties:
- Under 1. Plug-in Source, use Installed plug-ins for normal system-installed effects.
- Choose the effect under 2. Installed Plug-in.
- If your VST3 is in a non-standard folder, choose Browse a .vst3 file… instead.
Installed effects are discovered automatically. Use Refresh Plug-in List after installing a new VST3 while OBS is already open.
6. Open the real vendor interface
Click 3. Open Plug-in Interface. The native vendor editor should appear in front of OBS so you can immediately adjust the plug-in.
7. Confirm the status
A healthy plug-in reports a Ready state and may show its latency. If a plug-in cannot initialize, OBS Safe VST3 Host keeps the failure outside the OBS process boundary and reports diagnostic information rather than intentionally loading the vendor DLL inside OBS.
Portable / manual install
Advanced users can download the portable ZIP and extract it directly into the OBS root. It contains the OBS module, isolated helper, isolated scanner, locale data, a readme and a manual uninstall script.
Quick troubleshooting
The VST3 does not appear
Confirm it is a Windows x64 VST3 audio effect, then click Refresh Plug-in List. Instrument-only VST3 plug-ins are intentionally excluded from the insert-effect list.
The vendor GUI opens but I hear no processed audio
Check that the OBS source is producing audio and that the effect is not bypassed. If the filter reports a failure instead of Ready, capture the exact status and relevant [obs-safe-vst3] log lines for a bug report.
Windows blocks the installer
Do not disable Defender or SmartScreen globally. Confirm you downloaded from the official GitHub release, optionally verify SHA-256, then make your own trust decision for the unsigned package.