previewer
/ˈpriːvjuːər/
noun
- A person who looks at something before it is officially released or shown to the public, especially to evaluate or check it.
- As a book previewer, she reads manuscripts and suggests changes to the author.
- The film previewer gave the movie a positive review before its release.
- The software company hired a previewer to test the new app for bugs.
- A tool or feature that allows someone to see a sample or early version of something, such as a document, image, or video.
- The photo editor has a built-in previewer so you can see changes before saving.
- Use the PDF previewer to check the layout before printing.
- The website's previewer shows how your post will look on mobile devices.