# Elyzer: step by step custom analyzer debugging

**URL:** <https://discuss.elastic.co/t/elyzer-step-by-step-custom-analyzer-debugging/31345>\
**Category:** Elastic Community and Ecosystem\
**Created:** [September 29, 2015, 3:54pm UTC](https://discuss.elastic.co/t/elyzer-step-by-step-custom-analyzer-debugging/31345 "2015-09-29T15:54:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![softwaredoug](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/softwaredoug/32/22681_2.png) [@softwaredoug](https://discuss.elastic.co/u/softwaredoug)\
**Post date:** [September 29, 2015, 3:54pm UTC](https://discuss.elastic.co/t/elyzer-step-by-step-custom-analyzer-debugging/31345/1 "2015-09-29T15:54:05Z")

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[Elyzer](http://github.com/o19s/elyzer) is a handy tool I've made to debug custom analyzers. Elasticsearch lets you see the final output of an analyzer's output via `_analyze`. Unfortunately it doesn't let you pry into what happens at each step. Elyzer helps you do that:

```bash
doug$ elyzer --es http://localhost:9200 --index tmdb --analyzer english_bigrams --text "captain picard was cool"
TOKENIZER: standard
{1:captain} {2:picard} {3:was} {4:cool}    
TOKEN_FILTER: standard
{1:captain} {2:picard} {3:was} {4:cool}    
TOKEN_FILTER: lowercase
{1:captain} {2:picard} {3:was} {4:cool}    
TOKEN_FILTER: porter_stem
{1:captain} {2:picard} {3:wa} {4:cool}    
TOKEN_FILTER: bigram_filter
{1:captain picard} {2:picard wa} {3:wa cool} 

```

In addition, please advocate for this [pull request](https://github.com/elastic/elasticsearch/pull/11660) that is still open that would give detailed step-by-step analysis output from ES.

Cheers!  
-Doug

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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 6, 2017, 1:44pm UTC](https://discuss.elastic.co/t/elyzer-step-by-step-custom-analyzer-debugging/31345/2 "2017-07-06T13:44:57Z")

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