Full Packet Capture

Arkime (formerly Moloch) is a large scale, open source, indexed packet capture and search tool.

Meet the developers and other Arkimists at our Office Hours.

Augment your current security infrastructure to store and index network traffic in standard PCAP format.
Arkime is not meant to replace Intrusion Detection Systems (IDS), instead it provides more visibility.


Access to Arkime is protected by using HTTPS with digest passwords or by using an authentication providing web server proxy. All PCAPs are stored on the installed Arkime sensors and are only available through the Arkime web interface or API. Arkime supports encrypting PCAP files at rest.

Want to report a security issue or just learn more? There's more info here.


Arkime is designed to be deployed across multiple clustered systems providing the ability to scale to handle multiple gigabits per second of traffic. PCAP retention is based on available sensor disk space while metadata retention is based on the scale of the OpenSearch/Elasticsearch cluster. Both can be increased at anytime.


A web application is provided for PCAP browsing, searching, analysis, and PCAP carving for exporting. Arkime stores and exports all packets in standard PCAP format allowing you to use your favorite PCAP ingesting tools during your analysis workflow.


APIs are exposed that allow PCAP data and JSON-formatted session data to be downloaded directly.

View the API documentation


Arkime Demo


Check it out!

Username and password are both arkime

Warning: Anyone can see anything you upload

Also, check out our recorded talks and feature demos.

Sessions Page

The Sessions page displays a list of indexed sessions for the selected time period and search expression. It includes a timeline graph and map of the session results.

Sessions screenshot

The search bar allows for powerful search queries to narrow down the data. Click the owl for available fields.

  Session detail

Get more information about any session and view the session's packet data by clicking the "+" button.

  Value actions

Hover and click any value to view a dropdown menu of actions, like applying that value as search criteria.

  Export PCAP

You can export search results as PCAP or CSV by clicking the "Actions" () drop down menu on the top right.

  Timeline search

Click and drag an area in the timeline to filter sessions by time.

  Country search

Click a country on the map to apply it as search criteria.

SPI View Page

The SPI (Session Profile Information) View page allows you to view unique values with session counts for each of the captured fields.

SPI View screenshot
  Toggle categories

Click on any section to open or close any field category.

  Search for fields

Search for fields within a category by using the input box within a category.

  Toggle fields

Click on a field in the top section of a category to toggle the field's visibility. You can also click the load/unload all buttons to load/unload all the fields in that category.

  Field actions

Click the button on any field to view actions that can be performed on that field. Like exporting unique values and opening the SPI Graph page.

  Cancel Load

Click the cancel button on the top right of the page if the page is taking a long time load data or you made a mistake when you issued a query.

SPI Graph Page

The SPI (Session Profile Information) Graph page shows a temporal view for the top unique values of any field.

SPI Graph screenshot

The first timeline graph and map shows an aggregation of all the results below. Click on the "x" button on this map to hide all maps.

  Search for fields

Make a selection from the SPI Graph drop down on the top left to view the unique values for different fields.

  More fields

Change the number of Max Elements to display more results.


Change the sort by dropdown to change how the results are sorted. By default, the results are sorted starting with the highest unique field value.

Connections Page

The Connections page shows a network graph of your search results.

Connections screenshot

Click and drag a node to lock it into place in the graph.

  Node Info

Hover over a node or a link to view more information (or hide it).

  Node/Link Weight

Change the Node/Link Weight dropdown to change how the node and link sizes are calculated.

  Change Source/Destination Nodes

Make a selection from the Src and Dst drop downs to visualize your data based upon different captured field relationships.

  Save png

Save the graph as a png!

Download Arkime

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Read our FAQ first!


Join our Slack workspace to discuss Arkime and ask questions.


Find a bug? Want a new feature? Open an issue on GitHub.


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  This site's code is open source. Please contribute!  

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