Enlarge photos 2× or 4× with AI — no upload, no blur
Drop a photo and get a sharper, larger image — AI super-resolution that runs entirely in your browser, not a plain resize.
jpg · png · webp — processed privately on your device
Sharper, bigger, and in bulk
The free tool above is fully usable on its own — unlimited 2× upscales, up to 1024px input, the compare slider and PNG/JPG/WebP export. Pro adds:
- 4× upscaling — Classical (art, icons, screenshots) and Photo (real camera images) model presets.
- Larger images — input up to 2048px, output up to 4096px on the long side.
- Sharpen control — an adjustable unsharp mask applied after upscaling.
- Batch to ZIP — upscale up to 10 images at once and download them together.
US$9 one-time
Want to try first? Use demo code AV-IMAGE-UPSCALER-PRO-DEMO to preview every Pro feature on this device.
Upscaling vs. resizing — what AI actually adds
Stretching a photo in an image editor just spreads its existing pixels over more space — every edge gets softer and blockier the further you push it. This tool instead runs an AI super-resolution model (Swin2SR) that has learned, from millions of image pairs, what sharp edges, texture and fine detail typically look like at higher resolution. It redraws the image at 2× or 4× the size while reconstructing plausible detail along edges and textures, so the result looks meaningfully sharper than a plain resize — not just bigger.
Which preset to use
Free upscaling uses a general-purpose 2× model that works well on almost anything. Pro unlocks two 4× presets built for different sources: Classical is tuned for clean graphics, illustrations, icons, logos and screenshots where edges are crisp to begin with; Photo is trained specifically on real-world camera images and handles the noise, compression artefacts and softness typical of phone and camera photos more gracefully. Picking the matching preset for your source gives a noticeably better result than using one for everything.
Why it runs on your device
The model downloads once from a CDN to your browser (roughly 30–60 MB for the free 2× model; the 4× models are larger) and is then cached, so every later upscale — free or Pro — runs entirely offline on your own device. Your photos are never uploaded to a server, there's no account, no per-image limit, and no watermark. On a browser with WebGPU support the model runs on your graphics hardware and is fast; without it, the tool automatically falls back to a WASM engine, which works everywhere but is slower.
Tips for the best result
AI upscaling reconstructs plausible detail — it can't invent information that was never captured. Start from the best-quality source you have: a crisp 800px photo upscales far better than a tiny, heavily compressed thumbnail. For very large photos, the free tier scales the input down to 1024px before upscaling (Pro raises that to 2048px) so processing stays fast — the notice above the Upscale button always tells you the working size before you commit.
Free vs. Pro
Free covers everyday use: 2× upscale, single image, input up to 1024px, the before/after compare slider, and PNG, JPG or WebP export — no watermark, no limit on how many times you use it. Pro (US$9 one-time) is for people upscaling in volume or needing more headroom: 4× Classical and Photo presets, input up to 2048px with output capped at 4096px, an adjustable sharpen control, and batch processing of up to 10 images to a single ZIP.
More free tools you might like
Browse the AppVitamins store → — own Image Upscaler Pro as a one-time purchase, or get the All-Access pass for every app.
Frequently asked questions
Is my photo uploaded anywhere?
Why is the first run slow?
What's the max image size?
Will it fix blur?
Does it work on phones?
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