DoetraFree · full resolution · nothing uploaded
Make small images big and sharp.
Enlarge a photo 2× or 4× with AI super-resolution — edges stay crisp instead of going soft and blocky. Full-resolution download, no watermark, no credits, nothing uploaded.
Before · stretched 4×
After · AI 4×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
- 1Drop a photo, screenshot or graphic.
- 2Pick 2×, 4× or an exact size, then Upscale. Drag the divider to compare.
- 3Download PNG, JPG or WebP at full resolution.
- 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
What does an AI upscaler do that normal resizing doesn’t?
Normal resizing stretches pixels, so edges blur and blocks appear. The AI has learned what sharp detail looks like and draws it in, so text, edges and textures stay crisp at 2× and 4×.
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.