---
title: "OptiScaler vs Lossless Scaling | OptiScaler"
description: "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."
canonical: https://optiscaler.ink/comparisons/optiscaler-vs-lossless-scaling
updated: 2026-10-18
---

# OptiScaler vs Lossless Scaling

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.

## Facts (2026-10-18)

- **Version:** OptiScaler 0.9.4 (reference build, July 2026)
- **APIs:** DirectX 11, DirectX 12, Vulkan
- **Upscalers:** DLSS, FSR and XeSS inputs/outputs where compatible
- **Frame generation:** Experimental OptiFG (DirectX 12)
- **Overlay:** Insert key
- **Install:** ZIP extracted next to the main game executable
- **Platform:** Windows; Linux via Proton/Wine varies
- **Site:** Independent guide — not the official project site

## OptiScaler vs Lossless Scaling (2026-10-18)

| Topic | OptiScaler | Lossless Scaling |
| --- | --- | --- |
| How it attaches | DLL files next to the game exe, using the game's own temporal input | External app over the game window |
| Upscaling quality path | Real DLSS/FSR/XeSS temporal pipeline where compatible | Window scaling plus its own algorithms |
| Frame generation | OptiFG (experimental, DX12) and managed FG outputs | LSFG frame generation for most games |
| Price | Free community tool | Paid app |
| Anti-cheat note | Avoid online/anti-cheat games | Also caution with anti-cheat titles |

## In short

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.

## How to decide

Confirm the game exposes a supported temporal input and which API it runs.

Test both options in the same scene with the same resolution.

Judge frame time, UI cleanliness and latency — then keep the winner and remove the other cleanly.

## FAQ

### What is OptiScaler?

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 does OptiScaler work in a game?

The game exposes an input upscaler, OptiScaler sits between the game and the selected output backend, and the chosen output handles the final upscaling path where compatibility allows.

### Does OptiScaler support DirectX 11?

Yes, DirectX 11 is supported, although the available output methods and behavior can differ from DirectX 12.

## Related

- [OptiScaler vs Lossless Scaling, DLSS, FSR and XeSS](https://optiscaler.ink/comparisons)
- [OptiScaler guides: install, FSR4, Linux, performance and safety](https://optiscaler.ink/guides)
- [OptiScaler vs native DLSS](https://optiscaler.ink/comparisons/optiscaler-vs-dlss)
- [OptiScaler vs native FSR](https://optiscaler.ink/comparisons/optiscaler-vs-fsr)
- [OptiScaler vs native XeSS](https://optiscaler.ink/comparisons/optiscaler-vs-xess)

## Download

ZIP next to the game executable: [Download OptiScaler](https://optiscaler.ink/download)

Markdown mirror: https://optiscaler.ink/comparisons/optiscaler-vs-lossless-scaling.md