About IsItFiller
What is IsItFiller?
IsItFiller is a free tool that helps anime fans identify filler episodes, so you can skip the ones that don't matter and focus on the story. We cover 363+ anime series with episode-by-episode filler guides, arc breakdowns, watch orders, and a calculator that shows you exactly how much time you save.
How We Classify Episodes
Every episode is placed into one of five categories based on its relationship to the source material:
- Manga Canon
- Directly adapts content from the manga. Essential to the story.
- Anime Canon
- Original anime content that is considered part of the official story (e.g., supervised by the manga author).
- Mixed
- Contains both canon and filler content in the same episode. Usually worth watching.
- Filler
- Not based on the source material. These episodes can be skipped without missing any plot points.
- Recap
- Summary of previous episodes. Safe to skip unless you need a refresher.
Data Sources
Our filler classifications and metadata are aggregated from multiple trusted sources in the anime community:
- •MyAnimeList— Synopses, genres, posters, episode durations
- •AniList— Franchise relations and alternate poster images
IsItFiller is a fan-made tool and is not affiliated with any anime studio, streaming service, manga publisher, or any of the data sources listed above. All anime titles and images are the property of their respective owners.