//top\\ Download Sql Developer 21.4.3 Jun 2026
If SQL Developer fails to start, it is almost always due to an incompatible Java version. Ensure you are using JDK 8 or 11.
Features robust auto-completion, syntax highlighting, code formatting, and refactoring tools for SQL and PL/SQL.
Always download from official Oracle sources to ensure you're getting a secure, unmodified version of the software. Verify file hashes when possible, keep your JDK properly configured, and export your connections regularly to avoid losing configuration data.
Before downloading SQL Developer 21.4.3, ensure your system meets these minimum requirements: download sql developer 21.4.3
Have a specific issue with version 21.4.3? Leave a comment below or check the Oracle Community forums for legacy support.
Included Apache Log4j 2.17.1 to address known vulnerabilities found in earlier 2021 releases.
Click the green icon in the top-left Connections panel. Enter a Name for your connection (e.g., Local_HR_DB ). Type in your database credentials ( Username and Password ). If SQL Developer fails to start, it is
If you have an account, enter your credentials to start the download automatically.
Oracle promotes the latest version (currently 23.x or 24.x). You must use the “Previous Releases” link or change the URL manually (e.g., replace “latest” with “21.4.3” in the download path).
sqldeveloper.exe --add-opens=java.base/java.lang=ALL-UNNAMED Always download from official Oracle sources to ensure
Oracle SQL Developer 21.4.3 is a specific release from March 2022 that addressed several performance and security issues, most notably a fix for significant slowness when executing queries on Windows.
On the archive page, scroll down or search for . You will see entries similar to:
Before downloading, you must review and accept the Oracle Technology Network License Agreement. Check the box to accept the terms, and the download will begin automatically.
localhost (if the database is on your machine) or the specific IP address. Port: Default is usually 1521 .
