File

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

Note: This feature is available in Web Workers.

The File interface provides information about files and allows JavaScript in a web page to access their content.

File objects are generally retrieved from a FileList object returned as a result of a user selecting files using the <input> element, or from a drag and drop operation's DataTransfer object.

A File object is a specific kind of Blob, and can be used in any context that a Blob can. In particular, the following APIs accept both Blobs and File objects:

See Using files from web applications for more information and examples.

Blob File

Constructor

File()

Returns a newly constructed File.

Instance properties

The File interface also inherits properties from the Blob interface.

File.lastModified Read only

Returns the last modified time of the file, in millisecond since the UNIX epoch (January 1st, 1970 at Midnight).

File.lastModifiedDate Deprecated Read only Non-standard

Returns the last modified Date of the file referenced by the File object.

File.name Read only

Returns the name of the file referenced by the File object.

File.webkitRelativePath Read only

Returns the path the URL of the File is relative to.

Instance methods

The File interface also inherits methods from the Blob interface.

Specifications

Specification
File API
# file-section

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
File
File() constructor
lastModified
lastModifiedDate
DeprecatedNon-standard
name
webkitRelativePath

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
Partial support
Partial support
No support
No support
Non-standard. Check cross-browser support before using.
Deprecated. Not for use in new websites.
See implementation notes.
Has more compatibility info.

See also