AI Image UpscaleUpscale Image to 4K

Enlarge and sharpen photos with AI image upscale powered by Topaz. When your source is large enough you can upscale image to 4K — results are labeled 4K-ready only when both output dimensions reach at least 3840 × 2160 px.

JPEG, PNG, or WebP · max 10 MB

1× — Original size, 2× — Double resolution, 4× — Quadruple resolution

Upscaled longest edge cannot exceed 20,000 px.

Upscale Your Image

Upscaled longest edge cannot exceed 20,000 px.

Upscale Factor

4× AI-upscaled 4608×3584 version of the same night fair portrait — Sample sourceUpscaled Result

Low-resolution 1152×896 night fair portrait before AI upscale — Sample sourceUpscaled Result

Labeled 4K-ready only when output reaches 3840 × 2160 px or higher.

Image Upscale in Action

See how AI image upscale transforms low-resolution photos. Results are labeled 4K-ready only when both output dimensions meet the 3840 × 2160 px threshold.

4× AI-upscaled 3264×5824 version of the same bee photo, with clearer wing veins, metal texture, and water droplets — Before AI upscaleAfter 4× AI upscale

Low-resolution 816×1456 macro photo of a bee on weathered metal with flowers and water droplets — Before AI upscaleAfter 4× AI upscale

4× result

Bee macro — 4×

An 816 × 1456 bee macro image enlarged to 3264 × 5824. The 4× result resolves wing veins, metal ridges, and individual water droplets.

Before AI upscale

816 × 1456

Low-resolution source

After 4× AI upscale

3264 × 5824

Upscaled Result

Product photo — 4×

A 600 × 400 shot quadrupled to 2400 × 1600. Resolution improves but neither dimension reaches 3840 × 2160, so it is labeled upscaled.

Upscaled

Landscape — 4×

A 1000 × 750 landscape becomes 4000 × 3000 after image upscale. Both dimensions exceed the threshold — 4K-ready.

4K-ready

Old scan — 2×

An 800 × 600 scan doubled to 1600 × 1200. Grain is reduced but output stays below 3840 × 2160 — labeled upscaled.

Upscaled

Image Enhancement Tool

Upscale Image to 4K – AI Image Upscale | Nano Banana Pro

Nano Banana Pro AI image upscale tool. Upscale image resolution up to 4K with Topaz. JPEG, PNG, WebP up to 10 MB. Factors: 1×, 2×, 4×.

AI Image Upscale – Upscale Image to 4K

AI-powered image upscale tool in Nano Banana Pro, driven by Topaz. Upscale image to 4K when both output width and height reach at least 3840 × 2160 px.

How AI Image Upscale Works

Three steps to upscale image resolution with Nano Banana Pro.

Upload Your Image

Choose Factor

Pick 1×, 2×, or 4×. The tool checks whether both output dimensions reach 3840 × 2160 px and labels the result accordingly.

Download Result

Topaz image upscale algorithms produce a high-resolution output. Download it or keep editing inside Nano Banana Pro.

Tips for Better Results

Start with the best source available

Image upscale performs best on well-exposed, low-noise originals. Heavy JPEG artifacts can be amplified, so use a lightly compressed file.

Mind the 20,000 px ceiling

If the longest edge exceeds 5,000 px, a 4× run hits the limit. Choose 2× or crop first.

Understand 4K-ready labeling

The label appears only when both output width and height reach at least 3840 × 2160 px. Not every image upscale qualifies — it depends on source size and factor.

Use WebP for faster uploads

WebP keeps upload times short while preserving quality. The engine handles WebP natively alongside JPEG and PNG.

Who Uses AI Image Upscale?

From e-commerce to personal archives, image upscale solves resolution problems without expensive equipment.

E-commerce Listings

Thumbnails that fall below marketplace resolution requirements get a resolution boost, improving click-through rates and reducing returns caused by blurry visuals.

Print and Large-Format Design

Banners and posters demand high-resolution sources. A 4× upscale turns a web-sized asset into a print-ready file with sharper edges than bicubic interpolation.

Photo Restoration

Scanned film and compressed archives benefit from AI enhancement on modern high-DPI displays. The model recovers texture traditional resizing loses.

Social Media Content

Creators upscale smartphone photos to meet platform resolution recommendations. When source dimensions allow, the output can reach 4K-ready quality.

Game Assets and Concept Art

Artists prototype low-res, then upscale image resolution before delivery. AI preserves hard edges and color contrast better than nearest-neighbor scaling.

Real Estate Photography

Property listings need crisp imagery. A 2× or 4× upscale converts a compressed listing photo into a high-resolution asset for brochures.

Ready to Upscale Your Images?

Use the AI image upscale tool inside Nano Banana Pro to increase resolution and — when your source qualifies — upscale image to 4K in three steps.

Start Image Upscale

Frequently Asked Questions

What is AI image upscale?

AI image upscale increases pixel dimensions using models trained to reconstruct realistic detail instead of stretching pixels. Nano Banana Pro uses Topaz, producing sharper results than bicubic or Lanczos resizing.

Can I always upscale image to 4K?

Not always. To upscale image to 4K, both output width and height must reach at least 3840 × 2160 px. The tool labels results 4K-ready only when both dimensions are confirmed; otherwise the output is labeled upscaled.

Which formats does image upscale support?

JPEG, PNG, and WebP up to 10 MB each. TIFF, HEIC, and RAW are not supported — convert them before uploading.

What upscale factors are available?

1×, 2×, or 4×. The 1× option applies AI sharpening without resizing. 4× is the option most likely to upscale image to 4K when source dimensions allow.

Is there a maximum output size?

Yes — the longest edge cannot exceed 20,000 px. If a 4× run would breach that limit, choose a lower factor or crop first.

How long does image upscale take?

Processing time depends on image size, chosen factor, and server load. No fixed processing time is guaranteed.

Is image upscale lossless?

No. The model synthesizes detail not present in the original pixels, so output is an intelligent approximation. Always keep your original file.

Do I need a paid plan?

Image upscale follows Nano Banana Pro’s credit or subscription model and consumes credits per use. It is not offered as an unlimited free service. See the pricing page for costs.