What is the difference between Real-ESRGAN and the generative models?

Real-ESRGAN upscales pixel by pixel and never changes content, so photos, screenshots and line art stay true to the original. Generative models (Seedream, GPT-Image, Gemini) re-render the image with richer detail; small details, text and faces may change.

How large can the output be?

Real-ESRGAN outputs 2× / 4× the input. Generative models output up to 4K / UHD depending on the model; the maximum for each is listed on its card.

How are credits charged?

Per image, per model. Each card shows its starting price; the exact amount for the resolution and quality you choose is shown before you start. Nothing is charged if a job fails.

Do results carry a watermark?

Results from Gemini 3.1 Flash carry Google's SynthID, an invisible digital watermark, plus C2PA Content Credentials that identify the image as AI-generated. It is not visible and does not change how the image looks. We add no watermark of our own.

Is my image kept private?

Images are uploaded only so the model can process them. Results are shown to you for download and are not published or used to train models. Uploaded images and results are deleted automatically within 24 hours.

AI Image Enhancer — Upscale Photos to 4K / UHD

Real-ESRGAN

Pixel-faithful

Up to 4×. Enlarges without redrawing and cleans up blur, noise and compression artifacts; content stays true to the original.

Seedream 5.0 Lite

Regenerative

Up to 4K. Strong single-image editing. Faces and text may change.

Seedream 5.0 Pro

Regenerative

Up to 2K. The high-quality line, with more realistic lighting, materials and skin texture; suited to portraits and products. Faces and text may change.

GPT-Image-2

Regenerative

Up to UHD. Keeps faces and text stable, with adjustable quality. Details may still change.

GPT-Image-2.5 Flare

Regenerative

Up to UHD. OpenAI's fastest high-quality model, close to GPT-Image-2 in quality. Details may still change.

GPT-Image-2.5 Sunburst

Regenerative

Up to UHD. OpenAI's highest-quality, most precise editor; slower. Details may still change.

Gemini 3.1 Flash

Regenerative

Up to 4K. Fast, with reliable text rendering; fixed aspect ratios only. Faces and text may change.