↑ ⚡ Real-ESRGAN · Clarity Upscaler · Free

AI image upscaling — 2×, 4×, 8× resolution boost

Upload any photo and enhance it instantly with the most powerful open-source AI upscalers. No account, no Photoshop, no plugins — just sharper images.

Upscale an Image Free ↑ How it works

2×

4×

8×

Features

Professional upscaling, zero complexity

All the power of real AI upscaling models — accessible directly in your browser, for free.

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2×, 4×, 8× scales

Choose from 2× (HD to 4K equivalent), 4× (standard upscale), or 8× (maximum enlargement). Up to 8× available with Real-ESRGAN.

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Two AI models

Real-ESRGAN for fast, clean upscaling. Clarity Upscaler for maximum detail and AI-generated texture enhancement. Use the right tool for your image.

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Before/After slider

Drag the comparison slider to inspect every pixel difference between your original and the upscaled output. Zoom in on details before downloading.

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Face enhancement

Real-ESRGAN's optional face enhance mode uses GFPGAN to restore facial detail, sharpen eyes, and fix degraded skin texture alongside the upscaling pass.

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Everything works

Photos, illustrations, screenshots, scans, old damaged images, product photos, digital art — all supported. JPEG, PNG, WebP. Up to 10 MB per file.

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Privacy-first

Images are processed by Replicate and never stored on our servers. No account required, no email, no tracking of your uploads.

AI Models

Two upscaling engines — one platform

Choose the model that fits your image type and quality requirements.

⚡ Fastest

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Real-ESRGAN

nightmareai/real-esrgan

Neural network super-resolution model. Fastest upscaler, great for photos, illustrations, anime, and screenshots. 15–30 second processing.

2×, 4×, 8× scale factors
Optional GFPGAN face enhancement
Excellent for photos & screenshots
~15–30 second generation time
Open-source, battle-tested

Use Real-ESRGAN →

✨ Best Quality

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Clarity Upscaler

philz1337x/clarity-upscaler

Stable Diffusion-based upscaler that genuinely adds detail and texture. Best for portraits, nature photography, and artwork. 45–90 seconds.

2×, 4× scale factors
AI-generated texture & detail
Creativity & resemblance controls
Best for photos & portraits
~45–90 second generation time

Use Clarity Upscaler →

Full model comparison →

How it works

Upscale in 3 steps

Upload your image

Drag & drop or click to upload any JPEG, PNG, or WebP image up to 10 MB. Your image is shown in a preview immediately.

Choose scale & model

Pick 2×, 4×, or 8×. Select Real-ESRGAN for speed or Clarity Upscaler for maximum quality. Optionally enable face enhancement.

Compare & download

The AI processes your image in 20–90 seconds. Drag the before/after slider to compare, then download your high-resolution result.

FAQ

Frequently asked questions

AI upscaling uses neural networks trained on millions of images to intelligently add pixels when enlarging an image. Unlike traditional bicubic interpolation (which blurs), AI upscalers reconstruct realistic textures and detail — hair strands, fabric patterns, skin pores — that weren't in the original.

Use Real-ESRGAN when you need fast results, need 8× scale, or are upscaling screenshots, illustrations, or anime. Use Clarity Upscaler when quality is the priority — especially for portraits, landscapes, and detailed photography.

Yes. You get 10 free upscales per day with no account required. A Pro plan with unlimited access is in development.

Images are sent to Replicate's API for processing and are not stored on Upscaler.online servers. Replicate processes them and returns the result URL. See our Privacy Policy for full details.

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