Input Type of ElasticSearch

Hi All,
I am new on ElasticSearch. I practised a example in which I have imported .csv file from Logstash in ElasticSearch.
I want to ask you that how many types of input type I can use in ElasticSearch to import data file? Like, pdf, doc, excel, JSON, log, etc. files.
Please help me.
Thank You.

Elasticsearch accepts JSON only, so you need something like Logstash to convert things into JSON.

There are tools out there that can deal with binary formats, like doc/pdf/xls.

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