Version 21.4.3 is a release. Always get it from the Oracle archive, check the hash, and ignore third-party mirrors.
The official downloads for Oracle SQL Developer 21.4.3 are available through the Oracle SQL Developer Downloads 21.4.3 page
Released as part of the version 21 release cycle, version 21.4.3 is favored by many enterprise environments and database administrators for several key reasons:
Get-FileHash .\sqldeveloper-21.4.3.063.1748-x64.zip
After installing Oracle SQL Developer 21.4.3:
Click in the bottom left corner. If it displays Status: Success , click Connect . Troubleshooting Common Installation Issues "Cannot find a Java Development Kit" Error
By following this guide, you can confidently download and install a secure, verified copy of Oracle SQL Developer, ready for all your database development and administration tasks.
An Oracle account is required to start the download. 3. Installation & Launch
Users who want a plug-and-play installation without managing separate Java dependencies. File Type: .zip archive.
: Fully certified for Windows 7, 8, 10, Windows Server 2008/2012, Linux, and Mac OS X. Important Support Note Installing and Starting SQL Developer - Oracle Help Center
Simplified UI for moving data between schemas.

