Source 2 Viewer

* The library component of Source 2 Viewer is called ValveResourceFormat (VRF).

Valve's Source 2 resource file format parser, decompiler, and exporter. Source 2 files usually end with _c, for example .vmdl_c.

This repository is split into three components:

• CLI Decompiler - File data viewer, decompiler and a playground for testing new formats and features.
• GUI Viewer - A vpk archive viewer and extractor. Also supports viewing resources such as sounds, textures, models, maps, and much more.
• Library - Provides public API to parse resource files and some helpers.

⚒ View the official website for downloads.

Join our Discord

Eye catchy screenshots

What's supported?

• VPK viewer which supports opening and exporting files
• Creating new vpk archives
• Model viewer and decompiler to glTF and modeldoc
• Map viewer and decompiler to glTF and vmap
• Material decompiler to vmat
• Sound player
• Binary KeyValues3 parser
• NTRO support

Limitations

This tool is based entirely on a reverse engineered effort because Valve does not provide any documentation or Source 2 code (SDK or engine code), while the Source 1 SDK and leaked engine code are helpful, a lot of systems and formats have changed.

The code contained in this repository is based on countless hours of reverse engineering Source 2 games and not all intricate details have been figured out.

If you are interested in helping, take a look at the open issues and join our Discord.

Not all formats are 100% supported, some parameters are still unknown and not fully understood.

Supported resource types

Ext	Name	Support
vagrp	Animation Group	👍
vanim	Animation	👍
vanmgrph	Animation Graph	No
vcompmat	Composite Material	No
vcss	Panorama Style	👍
vdata	Data	👍
vents	EntityLump	👍
vjs	Panorama Script	👍
vmap	Map	👍
vmat	Material	👍
vmdl	Model	👍
vmesh	Mesh	👍
vmorf	MorphSet	👍
vpcf	Particle System	👍
vpdi	Panorama Dynamic Images	No
vphys	Physics Collision Mesh	👍
vpost	Postprocessing Settings	👍
vpsf	Particle Snapshot	No
vpulse	Pulse Graph Definition	No
vrman	ResourceManifest	👍
vrmap	Resource Remap Table	No
vrr	Response rules	👍
vseq	Sequence Group	No
vsmart	Smart Prop	Partially
vsnap	Particle Snapshot	👍
vsnd	Sound	👍
vsndevts	Sound Event Script	👍
vsndstck	Sound Stack Script	👍
vsurf	Surface Properties	No
vsvg	Panorama Vector Graphic	👍
vtex	Compiled Texture	👍
vts	Panorama TypeScript	👍
vvis	WorldVisibility	No
vwnod	WorldNode	👍
vwrld	World	👍
vxml	Panorama Layout	👍
vpk	Pak (package)	👍 Handled by ValvePak
vcs	Compiled Shader	👍 Handled by CompiledShader
vfont	Bitmap Font	👍 Decrypts VFONT1, supported in Source 1 and Source 2.
dat	Closed Captions	👍 Handled by ClosedCaptions
bin	Tools Asset Info	👍 Handled by ToolsAssetInfo
vdpn	Dota Patch Notes	👍
vdacdefs	DAC Game Defs Data	No
vfe	Flex Scene File	👍 Handled by FlexSceneFile
vcd	VCD	No
vcdlist	VCD list	👍

List of supported magics

Magic	Description
0x03564B56	VKV\x03 - First binary keyvalues 3 encoding with custom block compression
0x4B563301	KV3\x01 - Binary keyvalues 3 (version 1)
0x4B563302	KV3\x02 - Binary keyvalues 3 (version 2)
0x4B563303	KV3\x03 - Binary keyvalues 3 (version 3)
0x4B563304	KV3\x04 - Binary keyvalues 3 (version 4)
0x564B4256	VBKV - binary keyvalues 1 (handled by ValveKeyvalue)
0x55AA1234	VPK - valve package (handled by ValvePak)
0x44434356	VCCD - closed captions
0xC4CCACE8	tools asset info
0xC4CCACE9	tools asset info (newer version)
0x32736376	vcs2 - compiled shader
0x31415926	murmurhash2 seed used by StringToken
0xEDABCDEF	murmurhash64 seed used to encode resource IDs
VFONT1	"encrypted" font file
0x00564645	VFE - flex scene file

Command-line options

Option	Description
Input
--input (or -i)	Input file to be processed. With no additional arguments, a summary of the input(s) will be displayed.
--recursive	If specified and given input is a folder, all sub directories will be scanned too.
--recursive_vpk	If specified along with --recursive, will also recurse into VPK archives.
--vpk_extensions (or -e)	File extension(s) filter, example: "vcss_c,vjs_c,vxml_c".
--vpk_filepath (or -f)	File path filter, example: "panorama\" or "scripts/items/items_game.txt".
--vpk_cache	Use cached VPK manifest to keep track of updates. Only changed files will be written to disk.
--vpk_verify	Verify checksums and signatures.
Output
--output (or -o)	Output path to write to. If input is a folder (or a VPK), this should be a folder.
--all (or -a)	Print the content of each resource block in the file.
--block (or -b)	Print the content of a specific block, example: DATA, RERL, REDI, NTRO.
--vpk_decompile (or -d)	Decompile supported resource files.
--vpk_list (or -l)	Lists all resources in given VPK. File extension and path filters apply.
--vpk_dir	Print a list of files in given VPK and information about them.
Type specific export
--gltf_export_format	Exports meshes/models in given glTF format. Must be either 'gltf' (default) or 'glb'.
--gltf_export_materials	Whether to export materials during glTF exports.
--gltf_textures_adapt	Whether to perform any glTF spec adaptations on textures (e.g. split metallic map).
--gltf_export_extras	Export additional Mesh properties into glTF extras
--tools_asset_info_short	Whether to print only file paths for tools_asset_info files.
Other
--threads	If higher than 1, files will be processed concurrently.
--version	Show version information.
--help	Show help information.

There are also --stats related options, but they are not listed here as they are not relevant to most users.

Examples:

# List all files in the vpk
# Use `--vpk_dir` to also print file metadata
./Source2Viewer-CLI.exe -i "core/pak01_dir.vpk" --vpk_list

# Export the entire vpk as is
./Source2Viewer-CLI.exe -i "core/pak01_dir.vpk" --output "pak01_exported"

# Export only the "panorama/layout" folder
./Source2Viewer-CLI.exe -i "core/pak01_dir.vpk" --output "pak01_exported" --vpk_filepath "panorama/layout"

# Decompile and export all Panorama files to a folder named "exported"
./Source2Viewer-CLI.exe -i "core/pak01_dir.vpk" -e "vjs_c,vxml_c,vcss_c" -o "exported" -d

# Print resource blocks for a specific file similar to resourceinfo.exe in Source 2
# Use `--block DATA` to only print a specific block
./Source2Viewer-CLI.exe -i "file.vtex_c" --all

# Decompile a specific file on disk
./Source2Viewer-CLI.exe -i "file.vtex_c" -o exported.png

License

Contents of this repository are available under MIT license, except for Tests/Files folder contains files which have likely come from Valve's games.

Code signing policy

Free code signing provided by SignPath.io, certificate by SignPath Foundation.