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iApp AI Image Upscaler

Enlarge any photo, product shot or illustration 2x or 4x. Edges stay sharp and texture is rebuilt instead of blurred, in about one second.

1 IC per image

2x and 4x, up to 4096 x 4096

About 1 s per image

PNG, JPEG or WebP

Night market sign enlarged 4x: plain resize on the left, iApp AI Image Upscaler on the right

A 256-pixel photo enlarged 4x. Left: plain resize. Right: iApp AI Image Upscaler, unretouched.

Upscale Your Image Now​

Upload a JPEG, PNG or WebP up to 10 MB, or pick an example, choose 2x or 4x and press Upscale. Drag the handle on the result to compare before and after, then download. Log in with your iApp account; each image costs 1 IC, and a rejected request is not charged.

Log in to use your API keys or Create an account

Drop an image here or click to choose
Upload an image or pick an example, then press Upscale. Drag the handle to compare before and after.
Request as cURL
curl -X POST 'https://api.iapp.co.th/v3/store/image-generation/image-upscaler/upscale' \
  -H 'apikey: YOUR_API_KEY' \
  -F 'file=@photo.jpg' \
  -F 'scale=4' -F 'model=photo' -F 'output_format=png'

Before and After​

Each pair is a 300 x 300 crop from a 256-pixel source enlarged 4x. Left: plain resize. Right: the upscaler, photo model (illustration model for the last pair).

Portrait on stage: plain resize on the left, upscaler on the right
Portrait on stage
Product label: plain resize on the left, upscaler on the right
Product label
Night market: plain resize on the left, upscaler on the right
Night market
Illustration: plain resize on the left, upscaler on the right
Illustration, illustration model

How to Use​

  1. Log in and pick an API key. The upscaler uses your iApp account; new accounts can create a key on the API Keys page.
  2. Upload the image. JPEG, PNG or WebP, up to 10 MB. Transparent PNGs keep their transparency.
  3. Choose the scale. 4x for small images up to 1024 x 1024, 2x for images up to 2048 x 2048. The output is limited to 4096 x 4096.
  4. Choose the content type. Photo for photographs and general images, Illustration for anime and flat artwork, Fast when throughput matters more than detail.
  5. Choose the output format. PNG is lossless; JPEG and WebP are 10 to 20 times smaller.
  6. Press Upscale. The result appears in about one second. Drag the handle to compare, then download.

What Can You Upscale?​

E-commerce product photos

Supplier images that are too small for a zoomable product page

Print from web-sized files

4096 x 4096 covers A3 at 300 dpi for posters, banners and brochures

Old and low-resolution photographs

Scans and early digital photos, with JPEG artefacts cleaned up

Thumbnails and social media images

Pictures saved from chat or social apps that must be shown large

AI-generated images

Take a 1024 x 1024 generation to 4096 x 4096 for print or wallpaper

Illustrations and anime

A dedicated model keeps clean lines and flat colours

Tips for Great Results​

  • Start from the best copy you have. The upscaler rebuilds texture, but it cannot recover detail that was never in the file.
  • Use the Photo model for anything that came from a camera, including screenshots of photos.
  • Use the Illustration model for line art, anime, logos and flat graphics; the photo model adds texture such content should not have.
  • Choose PNG when you will edit or print the result, JPEG or WebP when you will post it online.
  • If the 4x output would exceed 4096 x 4096, the tool tells you the largest input for that scale; switch to 2x instead.

Measured Performance​

On the production service (7 September 2026, photo model), a 1024 x 1024 image becomes 4096 x 4096 in 0.98 seconds, and a 512 x 512 image becomes 2048 x 2048 in 0.23 seconds. On 29 reference images reduced 4x and enlarged back, the upscaler was closer to the original than a plain resize on all 29 (LPIPS 0.159 versus 0.284, lower is better). Full tables are in the API documentation.

Learn More​

Frequently Asked Questions​

Is it free? You need an iApp account with credits. Each image costs 1 IC regardless of size or scale. Failed or rejected requests are not charged.

What is the largest image I can upload? 10 MB and 16.8 megapixels. The output is limited to 4096 x 4096, so at 4x the input may be up to 1024 x 1024 and at 2x up to 2048 x 2048.

Does it keep transparency? Yes. A transparent PNG comes back as a transparent PNG at the new size.

Will faces and small text come out correctly? They come out sharp, but detail that was not in the source is invented rather than recovered. A face at 40 pixels will look like a face, not necessarily like the same person. Do not use the output as evidence of what a low-resolution image showed.

Are my images stored? No. Images are processed in memory on iApp-operated servers in Thailand and returned in the response; nothing is written to disk or sent to a third party.

Can I use the results commercially? Yes. The upscaled images are yours for personal or commercial use.

Ready to Upscale?

Four times the pixels, real detail, one second, 1 IC.

Start Upscaling Now