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Image Upscaler

ImagesFree · Private

Upscale images 2x or 4x using AI (Real-ESRGAN) — sharper than simple resizing. Runs entirely in your browser. No upload, no account, completely free.

Drop an image here or click to browse

JPEG · PNG · WebP — AI upscaling runs entirely in your browser

JPEG · PNG · WebP — instant high-quality upscaling via browser Lanczos, no download needed

How AI upscaling works

Standard resizing blurs edges because it guesses missing pixels by averaging neighbours. Real-ESRGAN uses a deep neural network trained on millions of image pairs to intelligently reconstruct detail — sharpening edges, recovering texture, and removing compression artefacts at the same time.

2× vs 4×

2× is faster and works well for most use cases — printing, presentation slides, social media. 4× produces dramatically larger output (16× the original pixel count) and is best for small thumbnails or low-resolution scans that need significant enlargement.

Best results

Works best on photos and illustrations under 1500 × 1500 px. For very large source images, resize down first using the Image Resizer, then upscale — you'll get better quality and faster processing. Highly compressed JPEGs benefit the most from upscaling since the model also reduces artefacts.

Privacy

The Real-ESRGAN model runs entirely in your browser via TensorFlow.js. Your images are never sent to any server.

Frequently Asked Questions

How is AI upscaling different from regular resizing?

Regular resizing (bicubic, bilinear) blurs edges because it just interpolates existing pixels. AI upscaling (Real-ESRGAN) uses a neural network trained on millions of images to predict and add realistic detail, producing sharper, cleaner results.

What scale factors are available?

2x doubles the width and height (4x the total pixels). 4x quadruples both dimensions (16x the total pixels). For most use cases 2x is faster and sufficient.

How long does upscaling take?

The AI model (~5 MB) downloads once and is cached. Processing time depends on image size and your device — a 500×500 image takes roughly 5–15 seconds. Very large images (above 1500px) may take longer; consider resizing first.

Is my image uploaded to a server?

No. The entire AI model runs locally inside your browser using TensorFlow.js. Your image never leaves your device.

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Image Resizer

Resize images to exact pixel dimensions in your browser. Lock aspect ratio, choose fit mode, set output format and quality. Your images stay completely private.

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Background Remover

Remove the background from any photo instantly using AI — all in your browser. No signup, no upload, completely private. Download as transparent PNG.

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Image Converter

Convert images between JPEG, PNG, and WebP formats instantly in your browser. Adjust quality, preview before/after, and download. No upload — 100% private.