> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://uploadcare.com/docs/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://uploadcare.com/docs/_mcp/server.

# jQuery File Uploader JS API: File Validation

> You can set which file types, formats, sizes, or resolution can be uploaded with our JavaScript API. Sign up for free and find more info in Uploadcare Docs!

> **Warning**
>
> **Warning:** jQuery File Uploader package is officially deprecated as of **September 1, 2025**.\
>
> Moving forward, we will no longer release updates or new versions of this widget.\
>
> Support will also be discontinued, except in cases where critical security vulnerabilities need to be addressed.\
> \
>
> We recommend considering our [web-component-based File Uploader](/docs/file-uploader/).

This entire page documents the deprecated jQuery-based Widget API. For current integrations, use `@uploadcare/file-uploader` instead, see the File Uploader API reference.