Vapourkit

Vapourkit is a free, open-source desktop app for restoring and upscaling video on Windows and Linux, licensed under GPL 3.0. It processes video with models and filters for tasks that include denoising, artifact removal, and frame interpolation. A live preview shows output as processing advances, so users can adjust filters and rerun a workflow; a side-by-side view compares source and result. Video Compare is built into Windows and optional on Linux. Users can queue multiple videos with custom workflows, write filters, and save or share portable .vkfilter and .vkworkflow files. Listed models include TSPAN / TFDAT VSR, AnimeJaNai, and AnimeSharpV4, and the app can import a user's own ONNX model. Inference options include TensorRT, DirectML, and NCNN Vulkan, depending on operating system and GPU. Windows has a stable download, while Linux downloads are nightly AppImages. Supported systems include Windows 10/11 x64 and compatible x86_64 glibc-based Linux distributions. The maker recommends at least 8 GB RAM and 6 GB VRAM.

Vapourkit provides video processing with preview, custom filters, and batch workflows at no cost. Linux users should note the nightly downloads and smaller verified filter catalog.

Vapourkit may suit people restoring or upscaling video, from those using a simple processing workflow to users building custom filters and batch pipelines. Check the operating-system, GPU, and Linux setup requirements before downloading.

Vapourkit is a free, open-source desktop application for restoring and upscaling video with VapourSynth filters, FFmpeg and AI models. It is aimed at users who want local processing they can tune, reuse and batch rather than a fixed one-click service. The combination of preview, comparison and portable workflows is its strongest case, while Linux users face nightly AppImages and a smaller verified filter selection.

Overview

Vapourkit supports both a straightforward load-and-process workflow and deeper pipeline building. Real-time preview displays output frames as processing advances, allowing filter changes followed by another run instead of waiting until the end to discover a poor result. A side-by-side source and output viewer makes visual checking practical. Video Compare is included on Windows and optional on Linux, so the comparison experience is more complete on Windows.

The application is free and open source under the GPL 3.0 license. Processing is local, with setup and hardware requirements that will matter to anyone without a suitable graphics stack: the maker recommends at least 8 GB of RAM and 6 GB of VRAM.

Key features

Models and inference

The included model set covers TSPAN / TFDAT VSR, AnimeJaNai and AnimeSharpV4, and users can import their own ONNX models. TensorRT, DirectML and NCNN Vulkan provide several inference routes, but availability depends on the operating system and GPU. DirectML is Windows-only, so Linux users cannot expect the same backend choices.

Filters and repeatable workflows

The VapourSynth catalog addresses deinterlacing, frame interpolation, restoration, denoising, sharpening, anti-aliasing, dehalo and debanding. Custom filters let experienced users go beyond the built-in recipes. Multiple videos can be queued with custom workflows, and portable .vkfilter and .vkworkflow files can be saved and shared, which suits repeat projects and batch processing better than ad hoc editing.

Linux has a curated, platform-verified catalog rather than the full Windows catalog. That improves the boundary of supported filters but limits experimentation compared with the Windows build.

Pricing

Vapourkit — free: The free plan is the application itself, including its open-source license, Windows stable download and Linux nightly AppImage. There is no free trial because there is no paid tier or trial period. The published plan does not impose usage quotas, seat charges or renewal terms, so it is a strong fit for individuals and teams comfortable running desktop software locally. The trade-off is operational rather than financial: Linux users receive nightly builds for now, while stable Linux downloads are planned for a future Ko-fi release.

Platforms

Vapourkit runs on Windows 10/11 x64 and x86_64 glibc-based Linux distributions capable of running an AppImage. Windows has a stable download. Linux setup creates a private Python virtual environment in the user’s configuration directory, installs packages without requiring global Python changes or sudo, and requires Python 3.12 or 3.13, FFmpeg/ffprobe and a working Vulkan runtime. Video Compare is optional on Linux. These dependencies make Vapourkit a better fit for technically comfortable desktop users than for machines with tightly managed or unsupported environments.

Who it's for

Choose Vapourkit if you restore archival footage, upscale anime or other video, need denoising, artifact removal or frame interpolation, and want to control the processing chain. It is particularly suitable when the same filter pipeline must be reused across many files or shared with others. Users who need a polished stable Linux release, the complete filter catalog or a cloud workflow should look elsewhere; Vapourkit’s strengths are local control and extensibility, not turnkey service delivery.

Pros and cons

• Pros: Free GPL 3.0 software avoids subscription costs; real-time preview and source/output comparison make iterative tuning easier; custom filters, imported ONNX models and VapourSynth coverage support advanced restoration; batch queues and portable workflow files make repeat processing practical; Windows and Linux support provides a local alternative to web services.
• Cons: Linux downloads are nightly AppImages rather than stable releases; Linux has fewer verified filters than Windows; DirectML is unavailable on Linux; Vulkan, Python and FFmpeg requirements add setup work; useful performance depends on having suitable RAM and GPU memory.

Alternatives

For a freemium, cross-platform product with mobile, web and API access, consider HitPaw VikPea; its 1 Month License costs $43.19 a month and renews automatically until canceled. Surveillant Forensic Video Enhancement is the better fit for forensic, camera-based workflows, with a $49 monthly Starter plan and paid cloud limits. Choose TensorPix for a web/API service with a free tier, weekly login credits and input capped at 720p. Aiarty Video Enhancer suits Windows or macOS users who prefer a conventional desktop license; its free version limits videos to 120 seconds, adds watermarks and omits batch export, while Standard costs $79 a year. SeedVR2 is another free option spanning Linux, macOS, self-hosted and Windows. Klarity is a free local and offline restoration tool for Linux and Windows. RestoraX fits users wanting free MIT-licensed, self-hosted GPU/CPU processing. Videvra Restore is a web-based free public beta for short restoration tests.

Verdict

Vapourkit is an excellent choice for Windows users and technically capable Linux users who want free, local video restoration with preview, custom filters, model flexibility and reusable batch workflows. Choose it for control and repeatability; look elsewhere if you need stable Linux releases, a complete cross-platform filter catalog or a managed cloud service.