I have a Tab Separated Value file that I need to import in mongodb

Question

Asked: May 27, 20262026-05-27T16:09:57+00:00 2026-05-27T16:09:57+00:00

I have a Tab Separated Value file that I need to import in mongodb
I do

mongoimport -d mydb -c blsItem --type tsv --file .\BLS_3.01.txt --fieldFile .\fieldnames-bls.txt

fieldname-bls.txt contains all the keys nicely separated in an UTF-8 file:

blsKey
germanDescription
englishDescription

The result of the import is, that every blsKey starts with glibberish

{ "_id" : ObjectId("4eee82136e6ffebe9085debd"), "´╗┐blsKey" : "B100000", "germanDescription" : "Vollkornbrote", "englishDescription" : ""

But even VIM shows the “fieldname-bls.txt” nice and clean.
What is going on?

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Editorial Team · Answer 1 · 2026-05-27T16:09:58+00:00

Editorial Team

It looks like UTF-8 BOM. Convert your file into UTF-8 without BOM, that’s it.

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