Oracle SQL Developer is a free, integrated development environment that simplifies the development and management of Oracle Database in both standard and cloud deployments. Version 21.4.3 represents a specific patch set release within the 21.4 cycle, noted for critical bug fixes and stability improvements over the initial 21.4 release. As legacy tools such as SQL*Plus become less suitable for modern GUI-centric workflows, ensuring the correct deployment of SQL Developer is essential for operational efficiency. This paper serves as a definitive reference for technical teams requiring the deployment of this specific version.
After downloading, always compare SHA-256 checksums against Oracle’s published values.
Warning: Avoid third-party sites like
download.cnet.com,softonic.com, or torrents. They may bundle malware, adware, or modified binaries. Only download from oracle.com domains.
Select the correct file for your operating system: download sql developer 21.4.3
| Platform | Recommended File | Notes |
|----------|----------------|-------|
| Windows | sqldeveloper-21.4.3-...-x64.zip | Choose the version with JDK 11 included to avoid manual Java setup. |
| macOS | sqldeveloper-21.4.3-...-macosx.dmg | Works on both Intel and Apple Silicon (via Rosetta 2). |
| Linux | sqldeveloper-21.4.3-...-no-jre.zip | You must have JDK 11 installed separately. |
Click the file name to begin downloading. You may need to accept the Oracle Technology Network License Agreement.
For security, verify the file integrity using the provided MD5 or SHA-256 checksums available on the download page. Oracle SQL Developer is a free, integrated development
Windows (PowerShell):
Get-FileHash .\sqldeveloper-21.4.3-...-x64.zip -Algorithm SHA256
Linux/macOS:
sha256sum sqldeveloper-21.4.3-...-x64.zip
Compare the output to the value listed on Oracle’s site. Warning: Avoid third-party sites like download
Do not skip this step. The biggest cause of “SQL Developer won’t open” is using the wrong Java version.
| Requirement | Specification | | :--- | :--- | | Java (JDK) | Version 11 (Required – will not work with Java 8 or Java 17 easily) | | RAM | 2 GB minimum (4 GB recommended) | | Resolution | 1024 x 768 minimum | | Disk Space | 1.5 GB |
Critical Tip: Download the version with the bundled JDK if possible. Oracle provides a “with JDK 11 included” zip file for Windows and macOS. This eliminates all Java path errors.