Substital on Crunchyroll: Add Japanese Subtitles (2026 Guide)

Substital is a Chrome extension that overlays custom subtitle files on streaming video — including Crunchyroll. Learners searching add Japanese subtitles to Crunchyroll often land here: download a fan `.srt` from Kitsunekko or jimaku.cc, upload it in Substital, align timing, then read Japanese while the English burn-in stays on screen.

Substital setup (step by step)

1. Install Substital from the Chrome Web Store.
2. Find a matching Japanese subtitle file (Kitsunekko guide).
3. Open the Crunchyroll episode and load the `.srt` / `.ass` in Substital.
4. Nudge the offset until dialogue lines up with speech.
5. Look up words with Yomitan or your dictionary of choice — Substital does not teach romaji.

Substital vs Jimaku Player vs Listening Mode

• Substital — simple file overlay; you manage downloads and offsets.
• Jimaku Player — userscript with series offset memory and jimaku.cc fetch (deep dive).
• AnimeVocab Listening Mode — no `.srt` hunt; romaji cards from audio for beginners (Crunchyroll hub).

When Substital is the wrong tool

If you cannot read Japanese, overlaying a perfect `.srt` still feels like a wall. Start with romaji-first learning or the free AnimeVocab extension. If you can read and want Anki mining, pair Substital/Jimaku with asbplayer.

Related: ManabiDojo integrates fan-sub workflows; best apps 2026 ranks the full stack.