The entire working file can stay in the tab
The GIF Builder reads a selected video or image sequence through browser file APIs. Video frames or decoded images are drawn to Canvas, reduced to a GIF-friendly palette, encoded in memory, and exposed through an object URL for preview and download. The source file does not need a server round trip.
- Local File and object URL APIs
- Browser video or image decoding
- Canvas frame capture
- In-memory GIF encoding
- Local preview and download
Compression is a set of visible choices
GIF file size grows with pixels, frames, duration, and color detail. The interface exposes those choices because there is no single quality slider that works for every destination. Shortening the clip usually has the clearest effect, followed by reducing width or frame rate.
Browser support is part of the product
A file picker can accept video without guaranteeing that every browser can decode every video codec. The tool reports decoding failures and recommends MP4 with H.264 as a practical fallback for MOV or HEVC sources that do not load.
The tool page should answer the next question
People arriving from search may not know which width or frame rate to choose. The page now keeps the utility first, then explains local processing, starting settings for common destinations, accessibility considerations for learning modules, common failures, and the relationship to other SideQuest Studio tools.