Embiggen

4× super-resolution

Four times bigger, still sharp.

Turn a 500 px image into 2000 px. The AI draws in real detail instead of stretching pixels — and the full 4× file is yours, no paid plan needed.

Drop an image hereJPG, PNG, WebP · up to 2048 px in, 8192 px out
No watermark Full resolution Nothing uploaded
Before · stretched 4×
After · AI 4×
A 160 × 200 px photo, enlarged to 640 × 800 — real output.

Pro features, free

What upscalers charge credits for. Here the AI runs on your device, so it costs nothing to give away.

How it works

  1. 1Drop the image.
  2. 24× is already picked — hit Upscale.
  3. 3Download the full-resolution result.
  • 4× upscalingFree plans stop at 2× Free
  • Full-resolution download — up to 8192 pxFree: preview size only Free
  • No watermarkWatermark on free images Free
  • No credits — as many images as you like3–10 credits a month, then $9–20/mo Free
  • Exact output size — type the pixels you needPro feature Free
  • Nothing uploaded — the photo stays on your deviceYour photo goes to their servers Free

Questions

Do other upscalers charge for 4×?

Often. Free plans usually stop at 2×, cap the output size or add a watermark. Here 4× at full resolution is free.

Is it really free? Is there a watermark?

Yes, it is free with no watermark, no credits and no sign-up. The AI runs on your own device, so there is no per-image server cost to pass on. Embiggen is a free tool by Doetra.

Is my photo uploaded?

No. The AI model is downloaded to your browser once (about 5 MB) and every image is enlarged on your device. Nothing is sent to a server.

How big can the result be?

Up to 8192 px on the long side. Very large photos are first scaled to 2048 px (upscaling a 20-megapixel photo adds nothing), then enlarged.

How long does it take?

A few seconds for a small image; 4× on a 1000 px photo takes about half a minute on a laptop. The picture is processed in tiles so your browser stays responsive.