# JSON Filtering In Logstash To Remove Unwanted Fields

**URL:** <https://discuss.elastic.co/t/json-filtering-in-logstash-to-remove-unwanted-fields/275697>\
**Category:** Logstash\
**Created:** [June 11, 2021, 3:54pm UTC](https://discuss.elastic.co/t/json-filtering-in-logstash-to-remove-unwanted-fields/275697 "2021-06-11T15:54:41Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![pkward](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/pkward/32/95305_2.png) [@pkward](https://discuss.elastic.co/u/pkward)\
**Post date:** [June 11, 2021, 3:54pm UTC](https://discuss.elastic.co/t/json-filtering-in-logstash-to-remove-unwanted-fields/275697/1 "2021-06-11T15:54:41Z")

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I want to ingest JSON PE file data that has 40+ fields w/nested fields. I only want the first few fields. Is there a way to either drop the unwanted fields or can I explicitly state which fields I want?

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**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [June 11, 2021, 4:03pm UTC](https://discuss.elastic.co/t/json-filtering-in-logstash-to-remove-unwanted-fields/275697/2 "2021-06-11T16:03:20Z")

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To filter top-level fields you can use a [prune](https://www.elastic.co/guide/en/logstash/current/plugins-filters-prune.html) filter with whitelist\_names.

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<div class="post-metadata">

**Author:** ![pkward](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/pkward/32/95305_2.png) [@pkward](https://discuss.elastic.co/u/pkward)\
**Post date:** [June 13, 2021, 9:38pm UTC](https://discuss.elastic.co/t/json-filtering-in-logstash-to-remove-unwanted-fields/275697/3 "2021-06-13T21:38:18Z")

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Thanks Badger.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 11, 2021, 9:39pm UTC](https://discuss.elastic.co/t/json-filtering-in-logstash-to-remove-unwanted-fields/275697/4 "2021-07-11T21:39:15Z")

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