Oracle Client Windows Download _top_ Jun 2026

Official downloads are hosted exclusively on the or the Oracle Software Delivery Cloud .

| Issue | Solution | |-------|----------| | “File not found” after download | Check antivirus; Oracle ZIPs are sometimes quarantined. | | “Oracle Client cannot be installed” | Run installer as Administrator. | | “Ora-12154: TNS could not resolve” | Missing or incorrect tnsnames.ora or no TNS_ADMIN set. | | “The specified module could not be found” | Missing Visual Studio Redistributable – download from Microsoft. | | 32-bit vs 64-bit mismatch | Ensure your application (e.g., Excel, Python) matches the Client bitness. | oracle client windows download

| Oracle DB Version | Recommended Instant Client Version | |------------------|-------------------------------------| | 19c / 21c | 21.x or 19.x | | 12c / 18c | 18.x or 12.2 | | 11g | 11.2 (old; requires support) | Official downloads are hosted exclusively on the or

Open and run:

Connecting to an Oracle database from a Windows machine requires the right client software. Depending on your needs, you might need a lightweight driver or a full set of administration tools. This guide covers the options, installation steps, and configuration tips for versions 19c and 21c. Choosing the Right Oracle Client | | “Ora-12154: TNS could not resolve” |

A comprehensive suite that includes the Oracle Universal Installer (OUI) . It features advanced networking tools, management consoles, and utilities like SQL*Loader and Data Pump. Where to Download

Once on the download page, locate the latest version (e.g., 21c or 19c) and click under the Client section. You will typically see three installer types for Windows (64-bit):