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fal-ai/qwen-image-2/edit

Qwen-Image-2.0 is a next-generation foundational unified generation-and-editing model
Learn more about Qwen Image 2
Inference
Commercial use
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Table of contents

About

Edit images using Qwen Image 2.

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

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("fal-ai/qwen-image-2/edit", {
  input: {
    prompt: "Replace the cute kid with a chinese warrior.",
    image_urls: ["https://v3b.fal.media/files/b/0a90b2a1/i89tMXz0SmiwL0ZvbnUvS_image_00240.png"]
  },
  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 case your app is running in an environment where you cannot set environment variables, you can set the API Key manually as a client configuration.
import { fal } from "@fal-ai/client";

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

3. Queue#

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("fal-ai/qwen-image-2/edit", {
  input: {
    prompt: "Replace the cute kid with a chinese warrior.",
    image_urls: ["https://v3b.fal.media/files/b/0a90b2a1/i89tMXz0SmiwL0ZvbnUvS_image_00240.png"]
  },
  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("fal-ai/qwen-image-2/edit", {
  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("fal-ai/qwen-image-2/edit", {
  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);

Read more about file handling in our file upload guide.

5. Schema#

Input#

prompt string* required

Text prompt describing the desired image. Supports Chinese and English. Max 800 characters.

negative_prompt string

Content to avoid in the generated image. Max 500 characters. Default value: ""

image_size ImageSize | Enum

The size of the generated image. If not provided, the size of the final input image will be used. Total number of pixels must be between 512x512 and 2048x2048.

Possible enum values: square_hd, square, portrait_4_3, portrait_16_9, landscape_4_3, landscape_16_9

Note: For custom image sizes, you can pass the width and height as an object:

"image_size": {
  "width": 1280,
  "height": 720
}
enable_prompt_expansion boolean

Enable LLM prompt optimization for better results. Default value: true

seed integer

Random seed for reproducibility (0-2147483647).

enable_safety_checker boolean

Enable content moderation for input and output. Default value: true

sync_mode boolean

If True, the media will be returned as a data URI and the output data won't be available in the request history.

num_images integer

The number of images to generate. Default value: 1

output_format OutputFormatEnum

The format of the generated image. Default value: "png"

Possible enum values: jpeg, png, webp

image_urls list<string>* required

Reference images for editing (1-6 images required). Order matters: reference as 'image 1', 'image 2', 'image 3' in prompt. Resolution: 384-5000px each dimension. Max size: 10MB each. Formats: JPEG, JPG, PNG (no alpha), WEBP.

{
  "prompt": "Replace the cute kid with a chinese warrior.",
  "negative_prompt": "low resolution, error, worst quality, low quality, deformed",
  "enable_prompt_expansion": true,
  "enable_safety_checker": true,
  "num_images": 1,
  "output_format": "png",
  "image_urls": [
    "https://v3b.fal.media/files/b/0a90b2a1/i89tMXz0SmiwL0ZvbnUvS_image_00240.png"
  ]
}

Output#

images list<File>* required

Generated images

seed integer* required

The seed used for generation

{
  "images": [
    {
      "url": "https://v3b.fal.media/files/b/0a90b2a1/VJ2suw3jKT7_VZ_6uz1Jb_TAY2WhAB.png"
    }
  ],
  "seed": 42
}

Other types#

ImageSize#

width integer

The width of the generated image. Default value: 512

height integer

The height of the generated image. Default value: 512

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.

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