Compare and Sync MySQL & MariaDB Schema and Data

KS DB Merge Tools for MySQL is an easy to use diff & merge tool for MySQL and MariaDB databases.

Compare and sync both schema and data
GUI for Windows; CLI for Windows & Linux
Free version: basic features ^*, no signup, no ads, no telemetry
Standard version: perpetual license, 14-day free trial
For MySQL 5.5 - 9.6 and MariaDB 10.2 - 12.2
Why KS DB Merge Tools

* We are currently working on an update to the Free License. It will include almost all the same features as the Standard License. The main limitation will be a 40-minute session duration limit. Since the current limited free version is being discontinued, we do not recommend starting with it. Instead, we suggest using the Trial version to fully explore the product. By the time it expires, the new fully-featured free version should be available (ETA by 2026-04-10), and you will be able to switch to it once your trial ends.

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Screenshots and Use Cases

Scroll the gallery and click on the image title to open the use case with detailed steps.
Use the toggle to switch application modes, if applicable.
Or explore the app's key features by watching our short video walkthrough (about 3 minutes).

KS DB Merge Tools for MySQL - Schema changes summary (thumbnail)

KS DB Merge Tools for MySQL - Data changes summary (thumbnail)

KS DB Merge Tools for MySQL - Compare and synchronize data (thumbnail)

KS DB Merge Tools for MySQL - Compare custom query result (thumbnail)

KS DB Merge Tools for MySQL - Compare and synchronize table definition (thumbnail)

KS DB Merge Tools for MySQL - Automation and Scripting (thumbnail)

KS DB Merge Tools for MySQL - Compare non-table schema objects (thumbnail)

KS DB Merge Tools for MySQL - Compare object definition (thumbnail)

Schema changes summary

Data changes summary

KS DB Merge Tools for MySQL - Compare and synchronize data

KS DB Merge Tools for MySQL Free - Compare and synchronize data

Compare table data

Compare custom query result

KS DB Merge Tools for MySQL - Compare and synchronize table definition

KS DB Merge Tools for MySQL Free - Compare and synchronize table definition

Compare table schema

Automation and Scripting

KS DB Merge Tools for MySQL - Compare non-table schema objects

KS DB Merge Tools for MySQL Free - Compare non-table schema objects

Compare list of objects

Compare object definition

Free vs Standard

	Free	Standard, perpetual license
Price (USD, excluding VAT):	$0	Single-user personal license:	$80 BUY NOW
		Multi-user license for companies and organizations:	Starting at $105 per user, volume discounts: 5 users: $375 ($75 per user) 10 users: $700 ($70 per user) 20 users: $1200 ($60 per user) BUY NOW
		Payments are handled externally by PayPro Global (Toronto, Canada), transactions are encrypted and secure Includes a one year of free upgrades More about purchasing, license types and discounts
Compare schema and programming objects:	Tables (columns, constraints) ^{merge new only} Views Stored procedures Functions	Tables (columns, constraints, indexes, options) Triggers Views Stored procedures Functions Events Sequences (MariaDB) Other objects can be compared by querying system metadata
Compare data:	Per table ^{with limitations}	Per table Per view Any table/view vs any other table/view ^{merge only if target updateable} Any custom query result ^{diff only} Batch data diff across multiple tables, views, custom mappings and custom queries Data slices (customized subset of Batch data diff)
Other Standard features:	N/A	Diff profiles Id-Remap Merge Export to Xlsx and Json Application customization Misc. other enhancements: SSH support, scrollbars colored with changes summary, navigation thru changes, advanced search, etc. More about Standard features
Command line:	For Linux ^{with limitations}	For Linux and WSL For Windows Script Editor GUI

Free	Standard, perpetual license
Price (USD, excluding VAT):
$0	Single-user personal license: $80 BUY NOW Multi-user license for companies and organizations: Starting at $105 down to $60 per user BUY NOW More about purchasing and license types
Compare schema and programming objects:
Tables (columns and constraints) ^{merge new only} Views Stored procedures Functions	Tables (columns, constraints and indexes) Triggers Views Stored procedures Functions Events Sequences (MariaDB) Other objects can be compared by querying system metadata
Compare data:
Per table ^{with limitations}	Per table Per view Any table/view vs any other table/view ^{merge only if target updateable} Any custom query result ^{diff only} Batch data diff across multiple tables, views, custom mappings and custom queries Data slices (customized subset of Batch data diff)
Other Standard features:
N/A	Diff profiles Id-Remap Merge Export to Xlsx and Json Application customization Misc. other enhancements: SSH support, scrollbars colored with changes summary, navigation thru changes, advanced search, etc. More about Standard features
Command line:
For Linux ^{with limitations}	For Linux and WSL For Windows Script Editor GUI

If you have any questions, please contact us.