Free AI Image Upscaler — Upscale Images 2x or 4x Online

Upscale images 2x or 4x using AI (ESRGAN neural network) that runs entirely in your browser. No upload, no sign up, no watermark. Compare original vs upscaled with a drag-reveal slider.

Drop images to upscale
JPEG, PNG, WebP — up to 10 images
Or paste an image with Ctrl + V
or
0 images upscaled

How it works

1
Drop your image
JPEG, PNG or WebP — or paste from clipboard
2
AI upscales it
ESRGAN reconstructs fine details at 2× or 4×
3
Compare & download
Drag the compare slider, then save as PNG or JPEG

Why use this tool?

ESRGAN quality
Neural network reconstructs real textures — not just blurry interpolation
100% private
Images never leave your browser — no upload, no server, no account
Compare slider
Drag to reveal original vs upscaled side by side in the viewer

Frequently asked questions

Is my image uploaded to a server?
No. The AI model runs entirely inside your browser using TensorFlow.js and WebAssembly. Your images are never sent to any server — all processing happens locally on your device.
How does AI upscaling work?
The tool uses ESRGAN (Enhanced Super-Resolution GAN), a deep learning model that reconstructs fine details and textures when enlarging an image — far superior to bicubic interpolation. The model runs in your browser.
Why does the first upscale take longer?
The AI model file (~6 MB for 2×, ~17 MB for 4×) is downloaded once on first use. Your browser caches it automatically, so subsequent upscales start immediately without any download delay.
What is the difference between 2× and 4×?
2× doubles the width and height using a fast general-purpose model (~6 MB). 4× quadruples both dimensions using a larger ESRGAN model (~17 MB) that produces sharper, more detailed results — ideal for printing or large-screen display.
What image formats are supported?
Drop JPEG, PNG, or WebP images. Output can be saved as lossless PNG or JPEG at your chosen quality level.

Free AI Image Upscaler Online — 2x and 4x

Upscale images 2x or 4x using ESRGAN neural networks that run entirely in your browser. No upload required — your images never leave your device.

Drag-Reveal Comparison Slider

After upscaling, open the viewer and drag the compare slider to reveal the original versus the upscaled result side by side.

PNG and JPEG Output

Download as lossless PNG or compressed JPEG at your chosen quality level. No watermark, no sign up, no file size limits.

Also try our free Background Remover to remove image backgrounds in your browser — no upload, no account.