SubSmith – Turn your own videos into language-learning material
I've been learning Japanese for a few years and kept running into a similar problem. I'd find a video I wanted to learn from, hear a useful sentence, and then realise that turning that sentence into something I could study later was both time consuming and draining at times. I would end up jumping between a video player, subtitles/transcription, a dictionary, screenshots, audio clips and Anki. So I built SubSmith to bring that workflow together. You can drop a video or audio file into it, generate a transcript locally and then use the transcript alongside the media to: * look up words…
In plain words
SubSmith is a language-learning tool that converts videos and audio files into study material. Users upload media files, generate transcripts locally, and use the platform to look up words, replay lines, and create flashcards. The tool integrates a video player, dictionary, and note-taking features, eliminating the need to switch between multiple applications. It supports common formats like MP4, MKV, and MP3, with synced subtitles and export capabilities to Anki for spaced repetition learning.
written from the facts on this page · September 2026
From the sources
The immersive language learning platform. Generate accurate transcripts for any video, hover for instant definitions, and export to Anki.
Understand what native speakers really say. Learn vocabulary in context. Make progress with every video you watch. Supports all popular formats: MKV, MP4, MP3. Accurately synced subtitles, so you never adjust timing again. Hover over any word for instant definitions. Stay in the flow while building vocabulary naturally. Export audio clips, screenshots, and definitions to Anki. Turn content into a week of flashcards. The Lifetime licence itself doesn't expire. Compatibility, updates, and online services depend on the supported lifetime of the product. See the Terms of Service . These guides help you move from curiosity to a concrete immersion workflow. Use the Japanese roadmap or the Spanish…from subsmith.app
In the maker’s words, at launch
I've been learning Japanese for a few years and kept running into a similar problem. I'd find a video I wanted to learn from, hear a useful sentence, and then realise that turning that sentence into something I could study later was both time consuming and draining at times. I would end up jumping between a video player, subtitles/transcription, a dictionary, screenshots, audio clips and Anki. So I built SubSmith to bring that workflow together. You can drop a video or audio file into it, generate a transcript locally and then use the transcript alongside the media to: * look up words and sentences * replay individual lines * edit the transcript * save useful sentences with their original context/audio * export them as Anki cards The important part for me is that it works with your own media. It isn't tied to a particular streaming service or library, so I can use the random anime episode, podcast, lecture, etc. that I'm actually interested in studying. It's an offline-first desktop app, and transcription happens locally rather than sending the media to a transcription API. I'm sharing it here because I'm now more interested in finding out where this workflow breaks down for other people rather than adding features randomly now that I have solid core/base. For example: * Would you actually save sentences from your own media? * Which part of this process feels like too much work? * Does having the audio/context attached make creating an Anki card more useful? * Would you prefer this to work inside your existing video player/browser? * Is installing a desktop app a significant barrier? * And does requiring an account before starting the free trial make you give up? The current version does require an account to start the trial, and I'm trying to work out whether that's meaningful friction for the people who would actually use this. It's free to try, and I'd particularly appreciate feedback from people who already learn languages through their own videos, anime, films, podcasts or other media. I'm the developer, so I'll be around in the comments to answer questions and discuss how it works. https://subsmith.app
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