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  1. [ References  ](/en-US/docs/Web)
  2. [ Web APIs  ](/en-US/docs/Web/API)
  3. [ Blob  ](/en-US/docs/Web/API/Blob)

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##  In this article

  * Using blobs 
  * Constructor 
  * Instance properties 
  * Instance methods 
  * Examples 
  * Specifications 
  * Browser compatibility 
  * See also 

  1. **[ File API ](/en-US/docs/Web/API/File_API) **
  2. **_[ ` Blob ` ](/en-US/docs/Web/API/Blob) _ **
  3. Constructor 
    1. [ ` Blob() ` ](/en-US/docs/Web/API/Blob/Blob)
  4. Instance properties 
    1. [ ` size ` ](/en-US/docs/Web/API/Blob/size)
    2. [ ` type ` ](/en-US/docs/Web/API/Blob/type)
  5. Instance methods 
    1. [ ` arrayBuffer() ` ](/en-US/docs/Web/API/Blob/arrayBuffer)
    2. [ ` slice() ` ](/en-US/docs/Web/API/Blob/slice)
    3. [ ` stream() ` ](/en-US/docs/Web/API/Blob/stream)
    4. [ ` text() ` ](/en-US/docs/Web/API/Blob/text)
  6. Related pages for File API 
    1. [ ` File ` ](/en-US/docs/Web/API/File)
    2. [ ` FileList ` ](/en-US/docs/Web/API/FileList)
    3. [ ` FileReader ` ](/en-US/docs/Web/API/FileReader)
    4. [ ` FileReaderSync ` ](/en-US/docs/Web/API/FileReaderSync)

##  In this article

  * Using blobs 
  * Constructor 
  * Instance properties 
  * Instance methods 
  * Examples 
  * Specifications 
  * Browser compatibility 
  * See also 

#  Blob

**Note:** This feature is available in [ Web Workers ](/en-
US/docs/Web/API/Web_Workers_API) .

The **` Blob ` ** object represents a blob, which is a file-like object of
immutable, raw data; they can be read as text or binary data, or converted
into a [ ` ReadableStream ` ](/en-US/docs/Web/API/ReadableStream) so its
methods can be used for processing the data.

Blobs can represent data that isn't necessarily in a JavaScript-nati