Professional generative image upscaling powered by Topaz Labs. Wonder 3.5 leads the range, with Redefine for prompt-guided detail and Recovery for extreme low-resolution sources. Best for rebuilding sharp detail in small or blurry images.

topaz/upscale/image/generative

Learn more about Upscale

Inference

Commercial use

Partner

Schema

Playground API Examples

SandboxOpen in Sandbox

topaz/upscale/image/generative

Schema

Topaz Upscale Image Generative Image to Image API Docs | fal

SandboxOpen in Sandbox

topaz/upscale/image/generative

Learn more about Upscale

Inference

Commercial use

Partner

Schema

Playground API Examples

SandboxOpen in Sandbox

About

Topaz Generative Image Upscale (Wonder)

Generative upscaling that reconstructs and invents detail the source no longer has.

Models

Wonder 4 — automatic all-in-one enhancement, restoration and upscaling, preserving natural textures, with no model-specific controls. Supports up to 256 MP input and output; the complete upload request must fit within 500 MB.
Wonder 3.5 — finer detail with fewer repetitive patterns.
Wonder 3 — Topaz's most advanced generative realism model (default).
Wonder — one-click repair for low/medium resolution images.
Standard MAX — high-quality upscaling with generative help.
Redefine — prompt-guided creative upscaling (prompt, creativity, texture).
Recovery / Recovery V2 — rebuild extreme low-resolution images.

1. Calling the API#

Install the client#

The client provides a convenient way to interact with the model API.

npm install --save @fal-ai/client

Migrate to @fal-ai/client

The @fal-ai/serverless-client package has been deprecated in favor of @fal-ai/client. Install the new package and update your imports — see client setup.

Setup your API Key#

Set FAL_KEY as an environment variable in your runtime.

export FAL_KEY="YOUR_API_KEY"

Submit a request#

The client API handles the API submit protocol. It will handle the request status updates and return the result when the request is completed.

import { fal } from "@fal-ai/client";

const result = await fal.subscribe("topaz/upscale/image/generative", {
  input: {
    image_url: "https://storage.googleapis.com/falserverless/model_tests/codeformer/codeformer_poor_1.jpeg"
  },
  logs: true,
  onQueueUpdate: (update) => {
    if (update.status === "IN_PROGRESS") {
      update.logs.map((log) => log.message).forEach(console.log);
    }
  },
});
console.log(result.data);
console.log(result.requestId);

2. Authentication#

The API uses an API Key for authentication. It is recommended you set the FAL_KEY environment variable in your runtime when possible.

API Key#

In an environment where you cannot set environment variables, you can configure the API key manually on the client.

import { fal } from "@fal-ai/client";

fal.config({
  credentials: "YOUR_FAL_KEY"
});

Protect your API Key

When running code on the client-side (e.g. in a browser, mobile app or GUI applications), make sure to not expose your FAL_KEY. Instead, use a server-side proxy to make requests to the API. For more information, check out our server-side integration guide.

3. Queue#

Long-running requests

For long-running requests, such as training jobs or models with slower inference times, it is recommended to check the Queue status and rely on Webhooks instead of blocking while waiting for the result.

Submit a request#

The client API provides a convenient way to submit requests to the model.

import { fal } from "@fal-ai/client";

const { request_id } = await fal.queue.submit("topaz/upscale/image/generative", {
  input: {
    image_url: "https://storage.googleapis.com/falserverless/model_tests/codeformer/codeformer_poor_1.jpeg"
  },
  webhookUrl: "https://optional.webhook.url/for/results",
});

Fetch request status#

You can fetch the status of a request to check if it is completed or still in progress.

import { fal } from "@fal-ai/client";

const status = await fal.queue.status("topaz/upscale/image/generative", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b",
  logs: true,
});

Get the result#

Once the request is completed, you can fetch the result. See the Output Schema for the expected result format.

import { fal } from "@fal-ai/client";

const result = await fal.queue.result("topaz/upscale/image/generative", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b"
});
console.log(result.data);
console.log(result.requestId);

4. Files#

Some attributes in the API accept file URLs as input. Whenever that's the case you can pass your own URL or a Base64 data URI.

Data URI (base64)#

You can pass a Base64 data URI as a file input. The API will handle the file decoding for you. Keep in mind that for large files, this alternative although convenient can impact the request performance.

Hosted files (URL)#

You can also pass your own URLs as long as they are publicly accessible. Be aware that some hosts might block cross-site requests, rate-limit, or consider the request as a bot.

Uploading files#

We provide a convenient file storage that allows you to upload files and use them in your requests. You can upload files using the client API and use the returned URL in your requests.

import { fal } from "@fal-ai/client";

const file = new File(["Hello, World!"], "hello.txt", { type: "text/plain" });
const url = await fal.storage.upload(file);

Auto uploads

The client will auto-upload the file for you if you pass a binary object (e.g. File, Data).

Read more about file handling in our file upload guide.

5. Schema#

Input#

image_url string* required

Url of the image to be upscaled. Wonder 4 supports up to 256 MP input and output. The complete upload request must fit within 500 MB.

model ModelEnum

Generative upscaling model. Wonder 4 automatically enhances and upscales images with no model-specific controls. Wonder 3.5 offers finer detail and fewer repetitive patterns; Wonder 3 is Topaz's most advanced generative realism model (Wonder 2/Wonder are earlier generations); Recover 3 rebuilds natural detail; Standard MAX is high-quality precision-leaning upscaling; Redefine adds prompt-guided creative detail; Recovery and Recovery V2 rebuild extreme low-resolution images. Default value: "Wonder 3"

Possible enum values: Wonder 4, Wonder 3.5, Wonder 3, Wonder 2, Wonder, Recover 3, Standard MAX, Redefine, Recovery V2, Recovery

upscale_factor float

Factor to upscale the image by (e.g. 2.0 doubles width and height) Default value: 2

crop_to_fill boolean

output_format OutputFormatEnum

Output format of the upscaled image. Default value: "jpeg"

Possible enum values: jpeg, png

subject_detection SubjectDetectionEnum

Subject detection mode for the image enhancement. Applies to Wonder 3, Recovery and Recovery V2 models. Default value: "All"

Possible enum values: All, Foreground, Background

face_enhancement boolean

Whether to apply face enhancement to the image. Ignored by Wonder 4, which handles face recovery automatically. Default value: true

face_enhancement_creativity float

Creativity level for face enhancement. 0.0 means no creativity, 1.0 means maximum creativity. Ignored if face enhancement is disabled.

face_enhancement_strength float

Strength of the face enhancement. 0.0 means no enhancement, 1.0 means maximum enhancement. Ignored if face enhancement is disabled. Default value: 0.8

enhancement_strength Enum

Enhancement strength for generative upscaling. Applies to Wonder 3 and Wonder 3.5 models. When omitted, Topaz auto-configures it.

Possible enum values: low, medium, high

creativity integer

Creativity level for generative upscaling (1-6). Higher values produce more creative/hallucinated details. Applies to Redefine model only.

texture integer

Texture detail level for generative upscaling (1-5). Applies to Redefine model only.

prompt string

Text prompt to guide generative upscaling (max 1024 chars). Applies to Redefine model only.

autoprompt boolean

Enable automatic prompt generation for generative upscaling. Applies to Redefine model only.

sharpen float

Sharpening level (0.0-1.0). Applies to Redefine model only.

denoise float

Denoising level (0.0-1.0). Applies to Redefine model only.

detail float

Detail recovery level (0.0-1.0). Applies to Recovery V2 model only.

enable_safety_checker boolean

Authorized callers may set false to request relaxed screening. Default value: true

{
  "image_url": "https://storage.googleapis.com/falserverless/model_tests/codeformer/codeformer_poor_1.jpeg",
  "model": "Wonder 3",
  "upscale_factor": 2,
  "output_format": "jpeg",
  "subject_detection": "All",
  "face_enhancement": true,
  "face_enhancement_strength": 0.8,
  "enable_safety_checker": true
}

Output#

image File* required

The upscaled image.

{
  "image": {
    "url": "",
    "content_type": "image/png",
    "file_name": "z9RV14K95DvU.png",
    "file_size": 4404019
  }
}

Other types#

File#

url string* required

The URL where the file can be downloaded from.

content_type string

The mime type of the file.

file_name string

The name of the file. It will be auto-generated if not provided.

file_size integer

The size of the file in bytes.

Related Models

About

Topaz Generative Image Upscale (Wonder)

Generative upscaling that reconstructs and invents detail the source no longer has.

Models

Wonder 4 — automatic all-in-one enhancement, restoration and upscaling, preserving natural textures, with no model-specific controls. Supports up to 256 MP input and output; the complete upload request must fit within 500 MB.
Wonder 3.5 — finer detail with fewer repetitive patterns.
Wonder 3 — Topaz's most advanced generative realism model (default).
Wonder — one-click repair for low/medium resolution images.
Standard MAX — high-quality upscaling with generative help.
Redefine — prompt-guided creative upscaling (prompt, creativity, texture).
Recovery / Recovery V2 — rebuild extreme low-resolution images.

1. Calling the API#

Install the client#

The client provides a convenient way to interact with the model API.

npm install --save @fal-ai/client

Migrate to @fal-ai/client

The @fal-ai/serverless-client package has been deprecated in favor of @fal-ai/client. Install the new package and update your imports — see client setup.

Setup your API Key#

Set FAL_KEY as an environment variable in your runtime.

export FAL_KEY="YOUR_API_KEY"

Submit a request#

The client API handles the API submit protocol. It will handle the request status updates and return the result when the request is completed.

import { fal } from "@fal-ai/client";

const result = await fal.subscribe("topaz/upscale/image/generative", {
  input: {
    image_url: "https://storage.googleapis.com/falserverless/model_tests/codeformer/codeformer_poor_1.jpeg"
  },
  logs: true,
  onQueueUpdate: (update) => {
    if (update.status === "IN_PROGRESS") {
      update.logs.map((log) => log.message).forEach(console.log);
    }
  },
});
console.log(result.data);
console.log(result.requestId);

2. Authentication#

The API uses an API Key for authentication. It is recommended you set the FAL_KEY environment variable in your runtime when possible.

API Key#

In an environment where you cannot set environment variables, you can configure the API key manually on the client.

import { fal } from "@fal-ai/client";

fal.config({
  credentials: "YOUR_FAL_KEY"
});

Protect your API Key

3. Queue#

Long-running requests

Submit a request#

The client API provides a convenient way to submit requests to the model.

import { fal } from "@fal-ai/client";

const { request_id } = await fal.queue.submit("topaz/upscale/image/generative", {
  input: {
    image_url: "https://storage.googleapis.com/falserverless/model_tests/codeformer/codeformer_poor_1.jpeg"
  },
  webhookUrl: "https://optional.webhook.url/for/results",
});

Fetch request status#

You can fetch the status of a request to check if it is completed or still in progress.

import { fal } from "@fal-ai/client";

const status = await fal.queue.status("topaz/upscale/image/generative", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b",
  logs: true,
});

Get the result#

Once the request is completed, you can fetch the result. See the Output Schema for the expected result format.

import { fal } from "@fal-ai/client";

const result = await fal.queue.result("topaz/upscale/image/generative", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b"
});
console.log(result.data);
console.log(result.requestId);

4. Files#

Some attributes in the API accept file URLs as input. Whenever that's the case you can pass your own URL or a Base64 data URI.

Data URI (base64)#

Hosted files (URL)#

You can also pass your own URLs as long as they are publicly accessible. Be aware that some hosts might block cross-site requests, rate-limit, or consider the request as a bot.

Uploading files#

We provide a convenient file storage that allows you to upload files and use them in your requests. You can upload files using the client API and use the returned URL in your requests.

import { fal } from "@fal-ai/client";

const file = new File(["Hello, World!"], "hello.txt", { type: "text/plain" });
const url = await fal.storage.upload(file);

Auto uploads

The client will auto-upload the file for you if you pass a binary object (e.g. File, Data).

Read more about file handling in our file upload guide.

5. Schema#

Input#

image_url string* required

Url of the image to be upscaled. Wonder 4 supports up to 256 MP input and output. The complete upload request must fit within 500 MB.

model ModelEnum

Possible enum values: Wonder 4, Wonder 3.5, Wonder 3, Wonder 2, Wonder, Recover 3, Standard MAX, Redefine, Recovery V2, Recovery

upscale_factor float

Factor to upscale the image by (e.g. 2.0 doubles width and height) Default value: 2

crop_to_fill boolean

output_format OutputFormatEnum

Output format of the upscaled image. Default value: "jpeg"

Possible enum values: jpeg, png

subject_detection SubjectDetectionEnum

Subject detection mode for the image enhancement. Applies to Wonder 3, Recovery and Recovery V2 models. Default value: "All"

Possible enum values: All, Foreground, Background

face_enhancement boolean

Whether to apply face enhancement to the image. Ignored by Wonder 4, which handles face recovery automatically. Default value: true

face_enhancement_creativity float

Creativity level for face enhancement. 0.0 means no creativity, 1.0 means maximum creativity. Ignored if face enhancement is disabled.

face_enhancement_strength float

Strength of the face enhancement. 0.0 means no enhancement, 1.0 means maximum enhancement. Ignored if face enhancement is disabled. Default value: 0.8

enhancement_strength Enum

Enhancement strength for generative upscaling. Applies to Wonder 3 and Wonder 3.5 models. When omitted, Topaz auto-configures it.

Possible enum values: low, medium, high

creativity integer

Creativity level for generative upscaling (1-6). Higher values produce more creative/hallucinated details. Applies to Redefine model only.

texture integer

Texture detail level for generative upscaling (1-5). Applies to Redefine model only.

prompt string

Text prompt to guide generative upscaling (max 1024 chars). Applies to Redefine model only.

autoprompt boolean

Enable automatic prompt generation for generative upscaling. Applies to Redefine model only.

sharpen float

Sharpening level (0.0-1.0). Applies to Redefine model only.

denoise float

Denoising level (0.0-1.0). Applies to Redefine model only.

detail float

Detail recovery level (0.0-1.0). Applies to Recovery V2 model only.

enable_safety_checker boolean

Authorized callers may set false to request relaxed screening. Default value: true

{
  "image_url": "https://storage.googleapis.com/falserverless/model_tests/codeformer/codeformer_poor_1.jpeg",
  "model": "Wonder 3",
  "upscale_factor": 2,
  "output_format": "jpeg",
  "subject_detection": "All",
  "face_enhancement": true,
  "face_enhancement_strength": 0.8,
  "enable_safety_checker": true
}

Output#

image File* required

The upscaled image.

{
  "image": {
    "url": "",
    "content_type": "image/png",
    "file_name": "z9RV14K95DvU.png",
    "file_size": 4404019
  }
}

Other types#

File#

url string* required

The URL where the file can be downloaded from.

content_type string

The mime type of the file.

file_name string

The name of the file. It will be auto-generated if not provided.

file_size integer

The size of the file in bytes.

topaz/upscale/image/generative

Table of contents

Table of contents

topaz/upscale/image/generative

About

Topaz Generative Image Upscale (Wonder)

Models

1. Calling the API#

Install the client#

Migrate to @fal-ai/client

Setup your API Key#

Submit a request#

2. Authentication#

API Key#

Protect your API Key

3. Queue#

Long-running requests

Submit a request#

Fetch request status#

Get the result#

4. Files#

Data URI (base64)#

Hosted files (URL)#

Uploading files#

Auto uploads

5. Schema#

Input#

Output#

Other types#

File#

Related Models

Table of contents

About

Topaz Generative Image Upscale (Wonder)

Models

1. Calling the API#

Install the client#

Migrate to @fal-ai/client

Setup your API Key#

Submit a request#

2. Authentication#

API Key#

Protect your API Key

3. Queue#

Long-running requests

Submit a request#

Fetch request status#

Get the result#

4. Files#

Data URI (base64)#

Hosted files (URL)#

Uploading files#

Auto uploads

5. Schema#

Input#

Output#

Other types#

File#

Related Models