# SmartUpscale

> Conditional integer scaling for images on webpages: nonblurry Nearest Neighbour scaling at integer scales, regular blurry scaling at fractional scales. Useful with 4K/5K monitors at 200% OS-level zoom.

Canonical page: [https://chrome-stats.com/d/smart-upscale](https://chrome-stats.com/d/smart-upscale)

## Overview

- **ID:** `smart-upscale`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Marat Tanalin
- **Category:** photos-music-videos
- **Daily users:** 899
- **Weekly downloads:** 15
- **Rating:** 4.78 / 5 (23 ratings)
- **Version:** 1.6
- **Last updated:** 2026-07-07
- **First published:** 2016-08-09
- **Size:** 19 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/smart-upscale/)

## Description

SmartUpscale is a Chrome extension designed to improve image clarity on high-resolution displays like 4K and 5K monitors, especially when using 200% OS-level zoom. It applies conditional integer scaling using a non-blurry Nearest Neighbour algorithm at integer scales, while applying regular scaling for fractional scales.

This extension ensures images do not become blurry by processing them once the page fully loads, upon dynamic page changes, and when you adjust the browser zoom level. Users can customize options such as the maximum image zoom level to prevent blurring and can also disable the blur prevention globally if desired. SmartUpscale is an essential tool for anyone seeking sharper images on high-DPI screens without compromising dynamic content or usability.

## Rankings

- #3,482 — Overall
- #10 — smartbook
- #11 — smart tool
- #15 — smartphone
- #20 — smart
- #71 — level

## Permissions and access

### Permissions

- `storage`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

Users consistently praise SmartUpscale for eliminating Firefox’s blurry upscaling on HiDPI/4K screens, delivering crisper nearest‑neighbor scaling helpful for pixel art, icons, webtoons and videos. Many call it essential for 200% or other high-DPI setups. There are no widely repeated complaints across reviews.

### Pros

- Sharpens low-resolution images on HiDPI/4K displays, fixing blurry upscaling.
- Removes Firefox's default blurry/bilinear scaling in favor of crisper (nearest‑neighbor) upscaling — good for pixel art and icons.
- Works well at common HiDPI/system zooms (many users mention 200% and improved readability at high DPI).
- Improves viewing of webtoons, YouTube and other small graphics by making images appear as true higher-resolution assets.

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Source: [Chrome-Stats](https://chrome-stats.com/d/smart-upscale)