Free AI Image Upscaler — Upscale to 2K, 4K & 8K

AI Upscaler

1. Model

Fast edge-sharpening (zone transform) — enlarges up to 4× (inputs ≤ 2048px, output capped at 4096px). Best on line art & flat color. Heavier detail? Switch to EZ Upscale.

0.5credits per generation

1 upscaled image included

2. Style / Look

Mode

PNG, JPG or WebP

Try an example · ESRGAN

3. Output

Advanced

ESRGAN has no advanced controls.

Upscale to 4K

Upload an image on the left to begin

A 256-pixel flat-colour armoured knight shown at its real pixel size, soft and blocky — Input · 256 px

The same knight after a 4× AI upscale, clean edges and flat colour intact — Upscaled · 4×

The helmet and shoulder region of the small input, magnified: blurred edges — Detail · before

The same region after upscaling: sharp armour lines and glowing eyes — Detail · after

Run: 256 px in, 1024 px out — ESRGAN 4K

Upscale any image to 2K, 4K & 8K.

A free AI image upscaler powered by generative super-resolution. Enlarge art, anime, renders and photos up to 8K — detail is reconstructed, not stretched, so edges stay crisp at print size.

Upscale · 2K, 4K & 8K 01 real run

A zoomed face region after AI upscaling, with reconstructed detail

Generative super-resolution, up to 8K

EZ Upscale reconstructs fine texture and detail instead of stretching pixels. Pick an output size from roughly 2K up to 8K, leave Enhance details and Enhance realism on for AI-generated art, and allow about 30 seconds per image.

Watercolor sample image you can load into the upscaler in one click

Sharp on cartoon, anime and flat-color art

Normal resizing (bicubic) stretches pixels and blurs edges. The ESRGAN pass reconstructs sharp lines and clean detail instead, which shows up most on cartoon, anime and flat-color work. Both engines share the same click-to-load samples — 3D render, watercolor, cartoon and anime — so you can compare them on the same image.

The same zoomed crop before upscaling, softened by plain browser scaling

An honest before and after

The comparison at the top of the page is a zoomed crop, because the difference only reads at magnification — and its “before” is cropped from the genuinely low-resolution source, never from the upscaled file. ESRGAN gives 2× guaranteed and 4× when the AI pass has capacity, capped at 4096px on the longest side, and the result banner always shows the exact resolution you received.

AI Image Upscaler — FAQ

Is the AI image upscaler free?

It's free to try — every account gets monthly free credits, and an ESRGAN upscale costs 0.5 credits. Sign up free and your monthly allowance covers casual use at no extra cost.

How much bigger does my image get?

2× guaranteed, 4× when the AI pass has capacity — capped at 4096px on the longest side. A 1024×1024 character comes back at 2048×2048, or 4096×4096 when the 4× pass lands. The result banner always shows the exact resolution you received, and each ESRGAN re-run costs 0.5 credits.

How is this different from just resizing?

Normal resizing (bicubic) stretches pixels and blurs edges. This uses an AI super-resolution model (ESRGAN) that reconstructs sharp lines and clean detail — especially visible on cartoon, anime, and flat-color art.

What file types and sizes can I upload?

PNG, JPG, or WebP up to 25 MB. Large and high-resolution images are optimized in your browser before upload. Drag and drop, paste from your clipboard, or reuse any image from your recent jobs.

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