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Asked: 2026-05-24T18:05:29+00:00

I’ve seen application/csv used and also text/csv . Is there a difference? Does it

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I’ve seen application/csv used and also text/csv.

Is there a difference? Does it matter which as long as the request matches something that’s available? Are they interchangeable?

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  1. Editorial Team

    RFC 7111

    There is an RFC which covers it and says to use text/csv.

    This RFC updates RFC 4180.

    Excel

    Recently I discovered an explicit mimetype for Excel application/vnd.ms-excel. It was registered with IANA in ’96. Note the concerns raised about being at the mercy of the sender and having your machine violated.

    Media Type: application/vnd.ms-excel

    Name Microsoft Excel ™

    Required parameters: None

    Optional parameters: name

    Encoding considerations: base64 preferred

    Security considerations: As with most application types this data is
    intended for interpretation by a program that understands the data on
    the recipient’s system. Recipients need to understand that they are at
    the "mercy" of the sender, when receiving this type of data, since
    data will be executed on their system, and the security of their
    machines can be violated.

    OID { org-id ms-files(4) ms-excel (3) }

    Object type spreadsheet

    Comments This Media Type/OID is used to identify Microsoft
    Excel generically (i.e., independent of version, subtype, or platform format).

    I wasn’t aware that vendor extensions were allowed. Check out this answer to find out more – thanks starbeamrainbowlabs for the reference.

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