Searching

Use the Mattermost Search field to find messages, replies, and the contents of files shared across all channels you’re a member of in your team’s conversation history. File content search is available in Mattermost Server from v5.35 and in Mattermost Cloud, with mobile support coming soon.

Use Search to find messages, replies, and the contents of files shared across channels.

You can also do more advanced search using search modifiers.

From Mattermost v6.1, your search results include messages from all of your teams.

Searching for message contents

Select the Search field, then type your search criteria.

When message results display in the Search Results pane, select Jump to view the full message in context.

Tip

Message results return first automatically if a message search isn’t specified. In the Search Results pane, select Messages or Files to toggle between results.

Searching for file contents

Select the Search field, select Files, then type your search criteria.

File contents that match on file name, or contain matching text content within supported document types, are returned in the Search Results pane. Each search result includes file name, extension, and size details, as well as details about when and where the file was originally shared.

For Mattermost Cloud workspaces, supported document file formats include PDF, PPTX, DOCX, ODT, HTML, and plain text documents. DOC, RTF, and PAGES file formats, as well as the contents of ZIP files, are not supported.
For Mattermost self-hosted deployments, supported document file formats include PDF, PPTX, DOCX, ODT, HTML, and plain text documents.
- System Admins can extend file content search support for self-hosted deployments to include:

To narrow search results further, in the Search Results pane, select the File Type Filter option, then select specific file types, such as documents, spreadsheets, or images.

Tip

Select the Channel Files icon below the channel name to access files recently shared in that channel.

Search modifiers

You can apply search modifiers to any search to reduce the number of results returned. Select a search modifier to add it to the Search field. Supported modifiers are described below.

`from:` and `in:`

Use from: to find messages or files from specific users.
- For example, searching from:john.smith only returns content from your Direct Message history with John Smith.
Use in: to find messages or files posted in specific Public channels, Private channels, Direct Messages, or Group Messages. You can specify channels by display name or channel ID.
- For example, searching Mattermost in:town-square only returns results in the Town Square Public channel that contains the term Mattermost, while searching Mattermost in:john.doe only returns results that contains the term Mattermost in your Direct Message history with John Smith.

`before:`, `after:`, and `on:`

Use before: to find messages or files posted before a specified date.
- For example, searching website before: 2018-09-01 returns messages or files containing the term website posted prior to September 1, 2018.
Use after: to find messages or files posted after a specified date.
- For example, searching website after: 2018-08-01 returns messages or files containing the term website posted after August 1, 2018.
Use both before: and after: together to search in a specified date range.
- For example, searching website before: 2018-09-01 after: 2018-08-01 returns all messages or files containing the term website posted between August 1, 2018 and September 1, 2018.
Use on: to find messages files posted on a specific date. Use the date picker to select a date, or type it in YYYY-MM-DD format.
- For example, searching website on: 2018-09-01 returns messages or files containing the term website posted on September 1, 2018.

Exclusions

Use the hyphen - symbol to exclude terms from your search results. For example, searching test -release only returns results that include the term test and exclude the term release.

This exclusion modifier can be used in combination with other modifiers to further refine search results. For example, searching test -release -in:release-discussion -from:eric returns all results with the term test, excludes posts with the term release, excludes posts made in the release-discussion channel, and excludes messages sent in Direct Messages by eric.

Quotation Marks

Use quotation marks " " to return search results for exact terms. For example, searching "Mattermost website" returns messages containing the exact phrase Mattermost website, but doesn’t return results containing Mattermost and website as separate terms.

Wildcard

Use the asterisk * symbol for wildcard searches that match within words. For example, searching rea* returns messages or files containing reach, reason, reality, real, and other words starting with rea.

Hashtags

Hashtags are searchable labels for messages. Anyone can create a hashtag in a message by using the pound sign # followed by alphanumeric or other unicode characters. Hashtag examples include: #bug, #marketing, #user_testing, #per.iod, #check-in, #마케팅.

Valid hashtags:

Don’t start with a number.
Are at least three characters long, excluding the #.
Are made up of alphanumeric or other unicode characters.
May contain dots, dashes, or underscores.

To search for messages containing hashtags, select a hashtag in an existing post, or type the hashtag (including the pound # symbol) into the search bar.

Note

Hashtags don’t link to channels. If you have a channel named “Marketing”, selecting a #marketing hashtag does not take you to the Marketing channel. To link to public channels, use the tilde ~ symbol followed by the channel name. For example ~marketing.

Notes about all searches

Multiple-word searches return results that contain all of your search criteria.
Search modifiers can help narrow down searches. See the Search Modifiers section for details.
You can search Archived channels as long as you’re a member of that channel.
- If you’re unable to see messages or files in archived channels in your search results, ask your System Admin if Allow users to view archived channels has been disabled under System Console > Site Configuration > Users and Teams.
- To remove archived channels from your search results, you can leave the Archived channels.
Like many search engines, common words such as the, which, and are (known as “stop words”), as well as two-letter and one-letter search terms, are not shown in search results because they typically return too many results. See the Technical Notes section for details.
IP addresses (e.g. 10.100.200.101) don’t return results.

Technical notes

Searching Chinese, Korean, and Japanese

The best experience for searching in Chinese, Korean, and Japanese is to use MySQL 5.7.6 or later with special configuration. See the Chinese, Japanese and Korean Search documentation for details.
You can perform searches without this configuration by adding wildcards * to the end of search terms.

Differences between PostgreSQL and MySQL search

By default, Mattermost uses full text search support included in MySQL and PostgreSQL. These databases have slightly different search behavior. Check Product menu > About Mattermost to see which database you’re using.

For example, different databases have different “stop words” filtered out of search results. See MySQL or PostgreSQL database documentation for a full list.

Other database-specific differences include:

PostgreSQL:

Email addresses don’t return results.
Hashtags or recent mentions of usernames containing a dash don’t return results.
Terms containing a dash return incorrect results since dashes are ignored in the search engine.

MySQL:

Hashtags or recent mentions of usernames containing a dot don’t return results.
Avoid using underline _ symbol to perform a wildcard search. Use the asterisk * symbol instead.
Stop words that are excluded from search in MySQL include: "a", "about", "an", "are", "as", "at", "be", "by", "com", "de", "en", "for", "from", "how", "i", "in", "is", "it", "la", "of", "on", "or", "that", "the", "this", "to", "was", "what", "when", "where", "who", "will", "with", "und", "the", "www".