How to get key names from JSON using jq

Question

curl http   testhost test com 8080 application app version   jq   version    jq        The above command outputs only the values as below    madireddy test com    2323    test    02-03-2014-13 41    application    How can I get the key names instead like the below   email  versionID  context  date  versionName

User · Answer

You need to use jq  keys     For example   echo    example1    1   example2    2   example3    3     jq  keys      Will output a line separated list    example1   example2   example3

User · Answer

In combination with the above answer  you want to ask jq for raw output  so your last filter should be eg         cat input json   jq -r  keys    From jq help        -r     output raw strings  not JSON texts

User · Answer

Here s another way of getting a Bash array with the example JSON given by  anubhava in his answer   arr    jq --raw-output  keys unsorted    sh  file json    echo   arr 0         Archiver-Version  echo   arr 1         Build-Id  echo   arr 2         Build-Jdk

User · Answer

To print keys on one line as csv   echo    b   2   a   1      jq -r  keys           tostring      csv    Output    a   b    For csv completeness     to print values on one line as csv   echo    b   2   a   1      jq -rS     jq -r              tostring      csv    Output    1   2

User · Answer

You can use     jq  keys  file json       cat file json     Archiver-Version     Plexus Archiver    Build-Id         Build-Jdk     1 7 0 07    Build-Number         Build-Tag         Built-By     cporter    Created-By     Apache Maven    Implementation-Title     northstar    Implementation-Vendor-Id     com test testPack    Implementation-Version     testBox    Manifest-Version     1 0    appname     testApp    build-date     02-03-2014-13 41    version     testBox       jq  keys  file json      Archiver-Version      Build-Id      Build-Jdk      Build-Number      Build-Tag      Built-By      Created-By      Implementation-Title      Implementation-Vendor-Id      Implementation-Version      Manifest-Version      appname      build-date      version      UPDATE  To create a BASH array using these keys   Using BASH 4    mapfile -t arr  lt   lt  jq -r  keys    ms json    On older BASH you can do   arr    while IFS    read -r line  do    arr     line   done  lt   lt  jq  keys    ms json    Then print it   printf   s n    arr       Archiver-Version   Build-Id   Build-Jdk   Build-Number   Build-Tag   Built-By   Created-By   Implementation-Title   Implementation-Vendor-Id   Implementation-Version   Manifest-Version   appname   build-date   version

User · Answer

To get the keys on a deeper node in an JSON   echo    data    1    user      name   2   phone   3        jq   user   keys     name   phone

User · Answer

echo    ab   1   cd   2     jq -r  keys    prints all keys one key per line without quotes   ab cd

[json] How to get key names from JSON using jq

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