If you cannot install external plugins, you can use built-in methods to manually reduce artifacts:
Cleaning up JPEG artifacts in legacy software like Adobe Photoshop 7.0 (released in 2002) requires specific plugins that are compatible with its older 32-bit architecture. While modern "Neural Filters" are not available for this version, several free and trial-based legacy tools still offer professional-grade noise reduction and artifact removal. jpeg cleanup plugin for photoshop 7.0 free download
This is one of the most highly recommended free options for older Photoshop versions. The "Community Edition" (version 2.6) provides a high-performance noise suppression tool specifically designed to eliminate digital noise and compression artifacts from JPEG images. Best for : Removing "salt and pepper" noise and color grain. If you cannot install external plugins, you can
: For severe noise, you can use the Median filter ( Filter > Noise > Median ) on a duplicated layer and then use a layer mask to paint the effect only onto the artifact-heavy areas (like flat backgrounds or skies). How to Install Plugins in Photoshop 7.0 Removing JPEG artifacts - Adobe Photoshop - Creative COW The "Community Edition" (version 2
This specialized plugin from Colormancer is built to remove noise from DSLR images and film scans. It is often cited by users as a significant improvement over Photoshop's native tools from that era.