XDA’s piece on running a 2023 RTX 4070 Ti against the latest DLSS 4.5 demos kept landing on the same point: outside Nvidia’s own marketing slides, the difference between a midrange GPU and a current-gen halo card is mostly frame generation. Drop a frame-gen layer between the game and the display and a 60 fps cap becomes a 120 fps cap on the same silicon. The trick is that the games themselves rarely ship with the option, and Nvidia gates DLSS Frame Generation to the RTX 40-series and newer.
We tested seven frame generation and PC scaling apps in 2026 that work outside the game’s settings menu. Every pick below adds either LSFG, FSR 3 frame-gen, or AFMF on top of titles that never shipped with it. A few also handle DLSS preset swapping and resolution scaling for older engines that need a push.
What to look for in a frame generation app
- Vendor coverage. Nvidia-only mods miss RDNA and Arc owners; AMD-only tools skip the bulk of the install base. The picks below cover all three.
- Game compatibility. Some apps inject directly into D3D11 / D3D12 / Vulkan; others run a window-capture pass over the game. Capture-based tools work with the widest range of titles, including DRM-protected ones.
- Latency cost. Frame generation roughly doubles displayed frames but adds 6 to 15 ms of latency. Anything heavier than 15 ms feels off, even at 144 fps.
- Second GPU offload. The single biggest win in 2026 is the ability to push frame generation work to a second GPU (usually an iGPU). It removes the perf cost of running frame-gen on the primary card.
- Cost. Lossless Scaling is a one-time $7 purchase. Most alternatives are free, open-source, or community-driven.
Quick comparison
| App | Best for | Free | Open source | Frame generation |
|---|---|---|---|---|
| Lossless Scaling | Any game, any GPU | Demo only | No | LSFG 3 |
| Magpie | Visual upscaling on Windows | Yes | Yes | Roadmap only |
| OptiScaler | Swapping upscalers in DLSS games | Yes | Yes | FSR 3.1 FG |
| DLSS Swapper | Keeping DLSS / FSR / XeSS DLLs current | Yes | Yes | No (handles DLLs) |
| ReShade | Post-processing and motion blur fixes | Yes | Yes | No |
| Special K | Heavy fixes on stubborn games | Yes (donation) | Source available | LSFG bridge |
| IntegerScaler | Pixel-art and emulator scaling | Yes | Yes (donation) | No |
The 7 best frame generation apps for PC
1. Lossless Scaling — best overall
Lossless Scaling runs a window-capture pass over the game and inserts generated frames using its LSFG 3 model. It works on any GPU vendor (NVIDIA, AMD, Intel Arc), with no DLL injection and no compatibility tier list to memorise. The dual-GPU mode in 2026 lets you offload the LSFG work to an integrated GPU or second card, which removes the perf hit on the main card. The app also bundles upscaling, custom scaling algorithms, and a per-game profile manager.
Where it falls short: LSFG adds noticeable smearing in heavy motion at lower base frame rates, and HUD elements blur on UI-heavy games. Lock the base frame rate to 60 or above and the smearing largely disappears.
Pricing: One-time $6.99 on Steam. No subscription. A free demo is available for the upscaling path.
Platforms: Windows 10/11 only. Steam Deck and other Linux setups can use the community lsfg-vk port.
Download: Steam
Bottom line: If a game is locked to 60 fps or lacks frame gen entirely, this is the first tool to install.
2. Magpie — best free open-source upscaler
Magpie focuses on visual upscaling rather than frame interpolation. It includes Anime4K, AMD FSR, NIS, and a long list of CRT shaders. Performance gains come from running the game at a lower internal resolution and letting Magpie upscale to native; the result is sharper than the in-game scaler in most engines from 2018 onward. There is an active feature discussion for frame generation, but the maintainer has been clear that quality scaling is the project goal.
Where it falls short: Frame generation is not on the current roadmap, despite long-running community requests. Compatibility with HDR titles is also rough.
Pricing: Free and open source (MIT). Available on the project’s GitHub release page.
Platforms: Windows 10/11.
Download: github.com/Blinue/Magpie
Bottom line: Pick this for free upscaling on older GPUs. Pair it with Lossless Scaling if you also want frame generation.
3. OptiScaler — best DLSS-to-FSR / XeSS swap
OptiScaler sits between a DLSS-enabled game and the underlying driver, intercepts the upscaling call, and lets you swap in FSR 2/3, XeSS, or DLSS depending on what your card actually supports. It also exposes FSR 3.1 frame generation in games that originally only shipped DLSS frame generation, opening that feature up to AMD and Intel cards.
Where it falls short: Per-game configuration is fiddly. Online services with strict anti-cheat will flag the DLL swap.
Pricing: Free and open source (GPL-3).
Platforms: Windows 10/11.
Download: github.com/cdozdil/OptiScaler
Bottom line: The cleanest path to FSR 3 frame generation in titles that shipped DLSS-only.
4. DLSS Swapper — best for keeping upscalers current
DLSS Swapper does one job well: it scans the games library on Steam, Epic, GOG, Xbox, and a handful of launchers, then swaps the DLSS, FSR, or XeSS DLL for the latest version. Newer DLLs ship every few months and often fix ghosting in older games that never receive a patch.
Where it falls short: It does not add frame generation. The benefit is purely keeping ship-it-and-forget games on the current model.
Pricing: Free and open source (GPL-3).
Platforms: Windows 10/11.
Download: github.com/beeradmoore/dlss-swapper
Bottom line: Run it once a quarter and forget about it. It is the lowest-effort upgrade on this list.
5. ReShade — best for post-processing and clarity
ReShade is a long-running shader injector that hooks into D3D9 through DX12 and Vulkan. It does not add frame generation directly, but the community-built MartysMods extensions provide motion blur correction, sharpening, and HDR fixes that pair well with frame-gen tools further up this list. Pairing Lossless Scaling with a ReShade clarity preset is a common combo for keeping older games sharp at 4K.
Where it falls short: Multiplayer titles ban DLL injectors. ReShade adds notable CPU overhead when many shaders are stacked.
Pricing: Free and open source.
Platforms: Windows 10/11.
Download: reshade.me
Bottom line: Use this for sharpening, color, and motion fixes on top of upscaling.
6. Special K — best fix-everything toolbox
Special K is a global injector that lets you fix issues the developer never patched: framerate locks, HDR bugs, broken anisotropic filtering, and missing display scaling. It also integrates with Lossless Scaling through the SKIF launcher, which is the most reliable way to combine LSFG with capped-frame games like Elden Ring.
Where it falls short: Learning curve is steep. The author maintains a long compatibility list and discourages use on competitive multiplayer titles.
Pricing: Free; the developer accepts donations on Patreon.
Platforms: Windows 10/11.
Download: special-k.info
Bottom line: Install it when a game is broken in a way only one community knows how to fix.
7. IntegerScaler — best for emulators and pixel art
IntegerScaler locks resolution scaling to whole integer multiples, which is what classic pixel art and retro emulator output actually want. It is not a frame generator, but it pairs with Lossless Scaling cleanly when running games that need 1:4 or 1:6 scaling without blur.
Where it falls short: Modern 3D games do not benefit. It is a specialist tool.
Pricing: Free for personal use; commercial licences available.
Platforms: Windows 10/11.
Download: tanalin.com/en/projects/integer-scaler
Bottom line: Keep it in the toolkit for emulator setups and indie pixel-art games.
How to pick the right one
- If you want one tool that adds frame generation to anything: Lossless Scaling. It is the answer 80% of the time.
- If you do not want to pay even $7: Magpie for upscaling, OptiScaler for swapping upscalers, both free and open source.
- If a game already supports DLSS frame generation but you have an AMD card: OptiScaler swaps it for FSR 3.1 frame-gen.
- If you mostly play older or pre-DLSS games on a current GPU: DLSS Swapper plus Lossless Scaling.
- If you have a Steam Deck or other handheld with no LSFG support: skip the LSFG path, use OptiScaler for FSR FG in DLSS-only games, and rely on the in-game scaler everywhere else.
- Skip the whole stack if your GPU already drives the target framerate at the panel’s native resolution. Frame generation is a fix for a shortfall, not a free upgrade.
FAQ
Does frame generation actually feel smoother? Yes when the base frame rate is above 50 fps. Below that, the input latency added by the generator outweighs the visual smoothness. Lossless Scaling and OptiScaler both publish recommended base-fps targets in their docs.
Can I get NVIDIA DLSS Frame Generation on a GTX or RTX 30-series card? No. The official DLSS-FG path is hardware-locked to RTX 40-series and newer. To get frame generation on older cards, use Lossless Scaling (vendor-agnostic) or OptiScaler with FSR 3 frame-gen.
Will frame generation get me banned in multiplayer games? Lossless Scaling, ReShade overlays, and DLSS Swapper have flagged users in titles with strict anti-cheat (Valorant, Faceit CS2). Single-player and PvE titles are safe. Always check the game’s anti-cheat policy first.
Is Lossless Scaling worth the $7? For most desktop owners with a panel above 60 Hz, yes. The Steam reviews are 96% positive over 100,000+ reviews, and the developer ships LSFG model updates several times a year.
What is the difference between upscaling and frame generation? Upscaling renders the game at a lower resolution and then upsamples it (DLSS, FSR, XeSS, Magpie). Frame generation inserts new in-between frames into the output stream (LSFG, AMD AFMF, NVIDIA DLSS-FG). They stack: most setups use both at the same time.
Do these apps work on Linux or Steam Deck? Lossless Scaling has a community Vulkan port (lsfg-vk) that runs on Linux and the Deck. Magpie and Special K are Windows-only. OptiScaler runs through Proton on Linux for the FSR 3 frame-gen path.
