Image & Video APIs

JavaScript SDK (Legacy) image and video upload

Last updated: Apr-30-2025

On this page:

Upload options
- Upload endpoint
Code examples

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When using the cloudinary-core JavaScript SDK, you can use one of several options to upload files directly to Cloudinary without the need for server-side operations or authentication signatures.

Upload options

Upload endpoint

The upload endpoint is https://api.cloudinary.com/v1_1/${cloudName}/upload. To use the endpoint in your application, use the JavaScript Fetch API to call the Cloudinary upload endpoint and pass:

an unsigned upload preset with the upload method options you want to apply for all files
the file(s) to upload
other unsigned upload parameters to apply to the selected files (e.g. tags, if needed).

Notes

Each of the upload options described above can also be performed as a signed upload, but in this case, an authentication signature must be generated on your backend server. This can be implemented in conjunction with one of Cloudinary's backend SDKs, which implement helpers to automatically generate the authentication signature for the upload.
If you are using jQuery in your app, you can take advantage of the built-in upload functionality in Cloudinary's jQuery SDK. This solution uses HTML5 cross-origin resource sharing (CORS) and gracefully degrades to a seamless iframe based solution for older browsers.

Code examples

Code sample: Implement the upload widget.
Code explorer: Upload multiple files using a form in pure JavaScript using the Cloudinary upload endpoint.
CodePen: Use the JavaScript Fetch API to upload files in vanilla JavaScript using the Cloudinary upload endpoint for unsigned uploading with an upload preset.
Glitch: Perform signed uploads from the browser by generating a signature on the server.

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