This tool lets you quickly and easily find out the status of your indexes and discover which databases need maintenance.
You can do maintenance through the UI, or generate a T-SQL script to run in SSMS.

SQL Index Manager – Free GUI Tool for Index Maintenance on SQL Server and Azure

• An incredibly fast describe engine
• Multiple databases scanning
• Advice on rebuilding or reorganizing
• Analysis of fragmentation results
• Configurable fragmentation thresholds
• One-click maintenance
• Command-line automation
• Automatic T-SQL script generation
• Columnstore maintenance support
• Statistics maintenance
• Collecting missing indexes
• Detect duplicate indexes
• Drop or disable unused indexes
• Index rebuild with compression options
• Export of scan results into Excel, CSV, HTML and text files
• Support for any editions of SQL Server 2008+ and Azure
• And a lot of other improvements :)

You can download .zip file with the latest build of the master branch from Releases

/connection "Data Source=HOMEPC\SQL_2017;Integrated Security=True;User ID=HOMEPC\PC"

This switch is used to specify connection string

/databases "AdventureWorks2017;AdventureWorks2012;msdb"

This switch is used to specify databases to manage indexes in

/connectiontimeout 30

This switch is used to specify connection timeout in seconds. Overrides value specified in the connection string

/commandtimeout 120

This switch is used to specify command execution timeout in seconds. Overrides default option (90 seconds)

/online

This switch is used to rebuild indexes with online option

/ignoreheap

This switch is used to ignore any heaps during maintenance

/ignorecolumnstore

This switch is used to ignore any columnstore indexes during maintenance

/ignorebtree

This switch is used to ignore any b-tree indexes during maintenance

/missingindex

Including missing indexes into regular maintenance

/maxdop 8

Configure the max degree of parallelism during maintenance. Overrides server option

/reorganizethreshold 15

Specifies reorganize the fragmentation threshold in %. Overrides default option (15%)

/rebuildthreshold 30

Specifies rebuild the fragmentation threshold in %. Overrides default option (30%)

/minindexsize 32

This switch is used to specify the minimum index size in MB. Overrides global option (6 MB)

/predescribesize 128

This switch is used to specify the predescribe index size in MB. Overrides global option (256 MB)

/maxindexsize 8096

This switch is used to specify the maximun index size in MB. Overrides global option (8 GB)