A preview is a brief excerpt, rendering, or simulation intended to represent a larger product before it is finalized or widely available. Previews appear across different fields: in movies they help audiences decide whether to watch, in video games they demonstrate play style, and in software they let users inspect output before committing changes. A preview is not the complete work but a controlled sample that suggests the whole.
Common types
- Trailers and teasers: short edited sequences for films and television that combine footage, music and text to convey tone.
- Gameplay and demo clips: excerpts that highlight mechanics, graphics and pacing in games.
- Print and document previews: WYSIWYG or scaled views that show how text and images will appear when printed or published.
- Thumbnails and streaming proxies: small, fast-loading images or low-resolution videos used online to summarize content before full retrieval.
Functions and uses
Previews serve multiple practical purposes. They are a marketing tool—used to advertise forthcoming releases—help quality-control processes by revealing layout or functionality, and assist accessibility by providing a quick understanding of content. In editorial workflows, previews allow reviewers to suggest edits; in consumer contexts, they reduce uncertainty and influence purchase or viewing decisions.
Technically, previews can be client-side or server-generated. Software features commonly create live previews that mirror final output (for example print preview and web page preview), while media previews often use compressed video or selected frames to keep bandwidth low. For streamed content a short video excerpt may be played before the full file is requested.
Historically, previews have evolved from printed advertisements and early film trailers shown in theaters to the rich, interactive previews available online. The rise of digital distribution and social platforms expanded the reach and formats of previews, allowing creators to tailor short-form content specifically for mobile and web consumption.
Distinctions and considerations: a preview differs from a demo or free trial in that it usually reveals only representative samples rather than full functionality. Creators must balance informative value with spoilers and legal requirements; for example, embargoes or rating guidelines sometimes limit what can be shown. Online previews are often embedded on websites and social feeds, where metadata and thumbnails influence discoverability and user response.