Image

Upload Image via Base64 Encoding

0calls

2 credits / call

When you need to process images on the frontend (such as after cropping or applying filters) and upload them directly without traditional forms, this endpoint comes in handy.

Interface Adjustment in Progress

This interface has been taken down due to policy reasons and will not be restored in the short term. Whether it will be restored later and the restoration time will be notified separately.

Overview

You just need to send the Base64 encoded string of the image, we will decode it, save it as an image file, and return a publicly accessible URL.

Usage Notes

Important

About imageData Format The imageData string you send must be in complete Base64 Data URI format, which needs to include MIME type information, such as data:image/png;base64,iVBORw0KGgo.... Missing the data:image/...;base64, prefix will cause decoding failure.

Request body

imageData

stringrequired

Base64 Data URI of the image, must include MIME type header. For example: data:image/png;base64,...

Name	Type	Attributes	Description
`imageData`	string	required	Base64 Data URI of the image, must include MIME type header. For example: `data:image/png;base64,...`

Response

200 / OK

Upload successful! Returns the access address of the image.

JSON

400 / Bad Request

Request failed. Possible reasons: request body is not valid JSON, missing imageData field, or imageData content is not a valid Base64 Data URI.

JSON

500 / Internal Server Error

Internal server error. An unknown error occurred while decoding or saving the image file. Please try again later.

JSON

Quick start

Pick your language to see usage examples

Auth mode:

cURL command

curl -X POST 'https://uapis.cn/api/v1/image/frombase64' \
  -H 'Content-Type: application/json' \
  -d '{"imageData": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII="}'

Frequently asked questions

Are there any special restrictions for the Upload Image via Base64 Encoding API?

Upload Image via Base64 Encoding follows our standard usage policy. Refer to the endpoint reference above for the exact rate limits and parameter requirements. Reach out if you have unusual needs.

Are the APIs on UAPI free to use?

UAPI gives every visitor free credits so you can call any endpoint right away. Visitor credits have a usage cap, and if you need more you can for additional credits.

Do I need to register an account to use UAPI?

No registration is required for visitor credit calls. If you need more credits or want to manage your call history, you can register a free account. Signed-in users get more free credits and can review usage details in the console.

Which languages and use cases does UAPI support?

Our APIs follow standard HTTP and RESTful design, so any language that can send network requests works — including JavaScript (Node.js, Vue, React), Python, Java, PHP, Go, C#, and more. They fit web apps, mobile backends, mini-program cloud functions, automation scripts, and similar scenarios.

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