# OptiScaler > OptiScaler redirects a supported in-game upscaler input to another supported output backend, with overlay tuning. OptiScaler 0.9.4 is a community upscaler translation layer for DirectX 11, DirectX 12 and Vulkan games: a supported DLSS, FSR or XeSS input can be redirected to another supported output, with an Insert-key overlay and experimental OptiFG frame generation on DirectX 12. Install is a ZIP extracted next to the main game executable. Avoid online or anti-cheat protected games. Linux use goes through Proton or Wine and varies by game. This is an independent informational website, not the official OptiScaler project website. Canonical download: https://optiscaler.ink/download Last reviewed: 2026-10-18 ## Docs - [OptiScaler documentation: install, outputs, FSR4 and Linux](https://optiscaler.ink/docs.md): Index of OptiScaler pages for people and answer engines. Homepage UI is unchanged; these URLs are the crawlable catalog for OptiScaler 0.9.4. - [OptiScaler install: ZIP next to the game executable](https://optiscaler.ink/install.md): Install OptiScaler the reversible way: download the ZIP, back up, extract next to the main game executable, launch offline, press Insert. - [OptiScaler guides: install, FSR4, Linux, performance and safety](https://optiscaler.ink/guides.md): Step-by-step OptiScaler guides for installation, compatibility, performance, Linux, FSR4 and common user questions. - [OptiScaler how-to: install, overlay, FSR4 and fixes](https://optiscaler.ink/how-to.md): Query-shaped how-tos: how to install, open the overlay, enable FSR4, fix a missing overlay and remove OptiScaler cleanly. - [OptiScaler vs Lossless Scaling, DLSS, FSR and XeSS](https://optiscaler.ink/comparisons.md): Side-by-side notes for OptiScaler versus Lossless Scaling, native DLSS, native FSR and native XeSS. - [OptiScaler terms: OptiFG, proxy DLL, input and output](https://optiscaler.ink/glossary.md): Short definitions: input upscaler, output upscaler, OptiFG, proxy DLL, Insert overlay, FSR4 and fallback paths. - [OptiScaler FAQ: the official 20 questions, answered](https://optiscaler.ink/faq.md): Standalone URLs for the official site's 20 OptiScaler questions — APIs, overlay, FSR4, Linux, anti-cheat and the manager question. - [OptiScaler on Windows, Linux Proton, DX11, DX12 and Vulkan](https://optiscaler.ink/platforms.md): Where OptiScaler runs and what changes per platform and API: Windows first, Linux through Proton/Wine. - [OptiScaler topics: safety, versions and expectations](https://optiscaler.ink/topics.md): Curated topic URLs for safety, manager/client claims, the 0.9.4 reference build and honest performance expectations. - [OptiScaler keyword index: every searched phrase, answered](https://optiscaler.ink/keywords.md): Canonical index of real OptiScaler search phrases — install, overlay missing, FSR4, Linux, manager/client and comparisons. Every keyword below has its own page. ## Featured - [OptiScaler documentation: install, outputs, FSR4 and Linux](https://optiscaler.ink/docs.md): Index of OptiScaler pages for people and answer engines. Homepage UI is unchanged; these URLs are the crawlable catalog for OptiScaler 0.9.4. - [OptiScaler install: ZIP next to the game executable](https://optiscaler.ink/install.md): Install OptiScaler the reversible way: download the ZIP, back up, extract next to the main game executable, launch offline, press Insert. - [OptiScaler vs Lossless Scaling, DLSS, FSR and XeSS](https://optiscaler.ink/comparisons.md): Side-by-side notes for OptiScaler versus Lossless Scaling, native DLSS, native FSR and native XeSS. - [OptiScaler FAQ: the official 20 questions, answered](https://optiscaler.ink/faq.md): Standalone URLs for the official site's 20 OptiScaler questions — APIs, overlay, FSR4, Linux, anti-cheat and the manager question. - [OptiScaler keyword index: every searched phrase, answered](https://optiscaler.ink/keywords.md): Canonical index of real OptiScaler search phrases — install, overlay missing, FSR4, Linux, manager/client and comparisons. Every keyword below has its own page. - [OptiScaler install guide: clean setup from start to finish](https://optiscaler.ink/guides/install-optiscaler-clean-setup.md): A practical OptiScaler install workflow with backups, correct game executable placement, first launch checks, and reversible troubleshooting. - [OptiScaler FSR4 guide: compatibility, INT8 and fallback checks](https://optiscaler.ink/guides/fsr4-compatibility-and-fallback.md): Learn how OptiScaler FSR4 support works, why hardware and driver requirements matter, how fallback can occur, and what to verify before tuning. - [OptiScaler Linux guide: Proton, Vulkan and setup considerations](https://optiscaler.ink/guides/linux-proton-guide.md): Understand OptiScaler Linux usage through Proton or Wine, Vulkan and DirectX translation, driver requirements, prefixes, and practical troubleshooting. - [How to install OptiScaler](https://optiscaler.ink/how-to/how-to-install-optiscaler.md): Extract the required files beside the main game executable and follow the setup method suitable for that game. Always back up replaced files first. - [How to fix the OptiScaler overlay not showing](https://optiscaler.ink/how-to/how-to-fix-overlay-not-showing.md): Common causes include an incorrect install folder, the wrong proxy DLL, input-hook conflicts, overlays, or a game-specific compatibility issue. - [OptiScaler vs Lossless Scaling](https://optiscaler.ink/comparisons/optiscaler-vs-lossless-scaling.md): A paid Steam app that scales and frame-generates almost any window from outside the game. Pick OptiScaler when a game exposes a supported temporal input and you want the real upscaler pipeline; pick Lossless Scaling for games with no usable input or when you cannot place files by the executable. - [What is OptiScaler?](https://optiscaler.ink/faq/what-is-optiscaler.md): OptiScaler is a community tool that can intercept supported in-game upscaler calls and redirect them to another supported upscaling backend, with additional tuning options. - [How do I install OptiScaler?](https://optiscaler.ink/faq/how-to-install.md): Extract the required files beside the main game executable and follow the setup method suitable for that game. Always back up replaced files first. - [OptiScaler on Linux through Proton](https://optiscaler.ink/platforms/linux-proton.md): Linux use is possible in supported configurations, commonly through Proton or Wine, but Vulkan, driver, and upscaler requirements can differ from Windows. - [OptiScaler Install](https://optiscaler.ink/keywords/optiscaler-install.md): Extract the required files beside the main game executable and follow the setup method suitable for that game. Always back up replaced files first. - [OptiScaler Download](https://optiscaler.ink/keywords/optiscaler-download.md): Learn what OptiScaler 0.9.4 does, which graphics APIs it supports, how its input-to-output workflow and Insert overlay work, and how to install the ZIP safely. ## Optional - [Full catalog](https://optiscaler.ink/llms-full.txt): every topic page in Markdown - [Sitemap](https://optiscaler.ink/sitemap.xml)