Reference Glossary
Proxy file
A lower-resolution or lower-bitrate stand-in for a large master asset, used for browsing, editing, or preview so the full original doesn't have to be opened or moved.
Why it matters in a DAM
DAM masters — RAW photos, 4K or 8K video, multi-layer PSDs — can run into gigabytes per file, and loading that master every time someone wants to preview or edit it is impractical over typical network speeds, so DAM systems generate lightweight proxies automatically at ingest for browsing and editing while the master stays archived untouched. Video editors specifically cut on proxies locally, then relink the finished timeline to the master only for final export and color grading, keeping day-to-day editing responsive.
A worked example
Common mistake
A team exports and delivers a browsing/editing proxy to a client instead of relinking to the full-resolution master before final delivery, shipping a visibly softer or lower-bitrate file than what the client actually licensed and expected as the finished asset.
A proxy file is a lightweight substitute generated from a heavy master — lower resolution, lower bitrate, or simply a smaller export — created specifically so people can browse, preview, or edit without pulling the full original across a network or opening it in resource-heavy software. The proxy is disposable in the sense that it can always be regenerated from the master; the master is what’s preserved as the source of truth.
In DAM practice, proxies solve a real bandwidth and performance problem: a library full of RAW photography or 4K video masters becomes unusable for day-to-day browsing if every thumbnail request or preview click has to stream the full file. Video production workflows lean on this most heavily — editors work with proxy footage on their local machines for responsive scrubbing and cutting, then relink the edited timeline to the master files only when it’s time for color grading and final export, at which point quality matters and file size no longer does.
The risk shows up at delivery time: because a proxy looks like a normal playable or viewable file, it’s easy to mistakenly hand one off as a finished deliverable instead of relinking back to the master first, which sends a client a visibly degraded version of work they expect at full quality.
Frequently asked
What is a proxy file?
A lightweight, lower-resolution or lower-bitrate stand-in for a large master asset, used for browsing, editing, or preview so the full original doesn't have to be opened or moved.
Why do DAM systems generate proxies automatically?
Masters like RAW photos, 4K or 8K video, and multi-layer PSDs can run into gigabytes per file, making it impractical to load the full master every time someone wants to preview or edit it over typical network speeds.
How do video editors typically use proxies?
They cut on proxy footage locally for responsive scrubbing, then relink the finished timeline to the master files only when it's time for color grading and final export.
What's the risk of delivering a proxy instead of relinking to the master?
A team can mistakenly export and hand off the browsing/editing proxy to a client instead of relinking to the full-resolution master, shipping a visibly softer or lower-bitrate file than what was licensed and expected.
Is a proxy file preserved long-term like a master?
No. It's disposable in the sense that it can always be regenerated from the master; the master is what's preserved as the source of truth.
What DAM asset types rely most heavily on proxies?
4K video masters (proxied for offline editing), RAW photography (compressed preview proxies for browsing), and multi-layer PSDs (flattened preview proxies for quick review).