19 versions of OCCT are listed here, from July 17, 2026 to the current 17.1.10.0. Each one links to the publisher’s own installer files.
| Version | Date | Size | Files |
|---|---|---|---|
| 17.1.10.0Latest | October 21, 2026 | 206.7 MB | 64-bit Portable 206.7 MB |
| 17.1.9.0 | October 16, 2026 | — | 64-bit Portable |
| 17.1.8.0 | October 13, 2026 | — | 64-bit Portable |
| 17.1.7.0 | October 6, 2026 | — | 64-bit Portable |
| 17.1.6.0 | October 1, 2026 | — | 64-bit Portable |
| 17.1.5.0 | September 23, 2026 | — | 64-bit Portable |
| 17.1.4.0 | September 21, 2026 | — | 64-bit Portable |
| 17.1.3.0 | September 17, 2026 | — | 64-bit Portable |
| 17.1.2.0 | September 11, 2026 | — | 64-bit Portable |
| 17.1.1.0 | September 10, 2026 | — | 64-bit Portable |
| 17.1.0.0 | September 9, 2026 | — | 64-bit Portable |
| 17.0.18.0 | August 24, 2026 | — | 64-bit Portable |
| 17.0.17.0 | August 19, 2026 | — | 64-bit Portable |
| 17.0.16.0 | August 17, 2026 | — | 64-bit Portable |
| 17.0.15.0 | August 12, 2026 | — | 64-bit Portable |
| 17.0.14.0 | August 4, 2026 | — | 64-bit Portable |
| 17.0.13.0 | July 31, 2026 | — | 64-bit Portable |
| 17.0.12.0 | July 21, 2026 | — | 64-bit Portable |
| 17.0.11.0 | July 17, 2026 | — | 64-bit Portable |