FAB – Asset Downgrader 1.35 August 2026 Free Download
Do you need to migrate assets to a different project that uses an older Unreal Engine version ?
Have you migrated assets to an earlier version of the Unreal Engine and they don’t seem to “appear” in the content browser ?
Do you want to make your assets available to people using earlier versions of Unreal Engine ?
Then what you need is to use the Asset Downgrader to downgrade those assets to the specific version you want.
Asset Downgrader will downgrade assets to 5.6.1, 5.5.4, 5.4.4, 5.3.2, 5.2.1, 5.1.1, 5.0.3, 4.27, 4.26 . It works by first upgrading the assets to Source Version (5.6), and then applying various patches to the .uasset files in order to make them compatible with the TargetVersion, just without the newer data (i.e. nanite data is removed for a 4.27 downgrade). Do note that features of the newer unreal versions (like nanite on masked materials, new material nodes, new niagara modules) can’t be ported to the old versions.
June 20, 2026
– fixed an issue related to StaticMeshes on 4.27 where LOD1+ materials would get mixed
– fix for a script bytecode serialization crash when downgrading to 4.27
– fixed texture crash due to UNiagaraEmitterEditorData
– removed Id redirect that made material functions have disconnecting nodes in materials
– fixes for downgrading material functions to 5.1-5.6 (fixed ExpressionInputID mismatch)
– anti crash fixes for 5.6 & Outfits
– fixed UChaosOutfitAsset double OutfitCollection variables. Other doubles may exist
– added FixOutfit
– added FixClothAsset and fixed one ManagedArrayCollection issue related to types that don’t exist in <=5.6
– fixed CachedPinPathOffset for 5.8
– fixed SkeletalMeshComponent redirect problem for <5.5 – added PostDowngrade in order to fix crashes related to SkeletalMeshes->SourceModels when being needed in Levels
– fixed crash related to HLOD actor embedded textures
– added FixRuntimeVirtualTexture
– asset version inis updated with default enabled plugins
– fixed crash related to RetargetBasePose in < 5.5 – added FixStateTree – fixed error related to default CustomizedUVs value on 4.27 – fix for EyeAdaptationInverse replacement when some inputs are missing – fixed blueprint local variables with identical GUID – FixSubstrateMaterials touched EditorData->FrontMaterial in order to fix materials with un updated expressions
– fixed substrate nodes for 5.2-5.3 because ConvertedStrataMaterialInfo disappeared in 5.4+
– limited RigVMNode subpins to 62 max for <5.2 because otherwise it crashes
– fixed RigVM pins that rely on ERigElementType values which must be clamped for lower versions
– fixed KnownExposableProperties & ExposedPropertyNames in UAnimGraphNode_LinkedAnimGraphBase
plus a new other fixes that didn’t fit in this box !
Downloads Section Below:
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Filename:  AssetDowngraderUE58_v1.35_vfxMed.rar [18.7 MB]
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