Source 2 Viewer

Overview

The project combines archive management, asset viewing, conversion, and decompilation rather than stopping at extraction. It is open-source, built by volunteers, and unaffiliated with Valve. That makes it a flexible option for exploring Source 2 resources, not an assurance that every compiled file can be fully recovered.

Alongside the main application, Source 2 Viewer provides a cross-platform command-line utility and ValveResourceFormat, a .NET library for programmatically opening and extracting resources. The CLI suits scripted export and decompilation; the library is for developers building their own tooling.

Key features

VPK archives

The viewer searches, extracts, and creates VPK archives, including all VPK versions and Source 1 VPKs. Batch extraction helps with larger collections, while repacking covers users who need to create archives as well as inspect them. If the work is limited to unpacking files, this breadth may be more than necessary.

Asset inspection and conversion

The 3D renderer displays maps, models, physics, and particles from CS2, Dota 2, Deadlock, and other Source 2 games, with real-time lighting and animation playback. Separate tools inspect textures, audio, and shaders. Texture controls include channels, depth layers, mip levels, cubemaps, and HDR; exports include PNG, TGA, and other image formats. The audio player handles WAV, MP3, and Source 2 audio, with waveform visualization and playback controls.

Maps, models, physics, and animations can be exported to glTF 2.0, with material conversion and batch export. The resulting files are described as compatible with Blender, Unity, and Unreal Engine, giving asset workflows a route into those tools. But some data may be lost in conversion, and data discarded by Valve’s compiler cannot be recovered; this is not a dependable route to exact reconstruction.

Decompilation and developer tools

Maps, models, and materials can be decompiled into editable formats for Hammer, ModelDoc, and Source 2 Workshop Tools. The CLI offers similar export and decompilation workflows without the GUI. ValveResourceFormat provides a separate programmatic interface, while Steam game detection can help the app find installed Source 2 titles.

The project is reverse-engineered, and not all formats are fully supported. Its coverage spans resource and KeyValues formats, but users dealing with less-supported or compiled data should expect gaps rather than assume every file will open cleanly.

Pricing

Source 2 Viewer — 0.00 USD per free. The plan is free and open source, with no free trial or paid tier described. It includes the archive viewer, inspection tools, exports, decompilation, and command-line utility. There are no seat or usage quotas to weigh against a paid plan; the trade-off is format coverage and lossy export, not a subscription limit.

Platforms

The GUI is Windows-only, and the maker’s guide says it can run on Linux and macOS through Wine. The GUI is portable and requires no installation. The command-line utility is available for Windows, Linux, and macOS, so cross-platform users who do not need the graphical interface have a more direct option. The development build is associated with OpenGL 4.6 and Windows 11.

Who it's for

Source 2 Viewer is a strong fit for Source 2 modders, asset researchers, and developers who want archive access plus visual inspection and conversion in one free toolkit. It is especially useful when the next step is editing in Workshop Tools or moving glTF assets into Blender, Unity, or Unreal Engine. It is less suitable for users who require complete extraction fidelity or a native GUI on Linux or macOS.

Pros and cons

• Pros: Archive search, extraction, creation, and batch extraction cover more than simple unpacking.
• Pros: 3D, texture, audio, and shader tools let users inspect different asset types before exporting.
• Pros: Free access, a cross-platform CLI, and a programmatic .NET library serve both manual and developer workflows.
• Cons: The GUI is Windows-only; Linux and macOS users need Wine, though the CLI runs natively across those platforms.
• Cons: Export can lose data, and some compiled-file data cannot be recovered, limiting use where fidelity matters.
• Cons: Reverse-engineered format support is incomplete, so unusual or unsupported resources may frustrate broad-coverage workflows.

Alternatives

Game Asset Extractors is a broader directory for comparing tools in this category. Choose SLADE3 for a free Linux, macOS, or Windows desktop editor, bearing in mind beta builds may have bugs, crashes, and unfinished features. AssetRipper is another cross-platform option, with a stable and nightly free plan and a $10 per month premium plan for users considering a paid tier.

OpenKH is a free alternative for users comfortable with its Apache-2.0 license and .NET 8.0 Runtime requirement. Rusted PackFile Manager is worth considering when its listed API, Linux, self-hosted, or Windows platforms and MIT license fit the workflow. QuickBMS is a free, open-source, multiplatform alternative. UABEA is a free option for Linux and Windows users. VPKEdit is another free option for Linux, macOS, and Windows. Crowbar is a free Windows alternative with no paid tiers stated.

Verdict

Choose Source 2 Viewer if you work with Source 2 assets and want archive handling, inspection, export, and decompilation without paying. Its main advantage is the range of workflows in one project, including a cross-platform CLI. Look elsewhere if you need a native non-Windows GUI or reliable, lossless recovery of every compiled asset.