Launched this week
Linesmith
Subtitle, translate and dub videos on your own computer
1 follower
Subtitle, translate and dub videos on your own computer
1 follower
Found the video you need, but it's in a language you don't speak? Linesmith turns the speech into subtitles, translates them into 33 languages and can dub it with AI voices. Windows and Linux, your own AI key, no minute counter. First 3 videos free.
Free Options
Launch Team
ClarifyThe full-stack AI CRM for modern GTM teams
Promoted
Hi Product Hunt, I'm Algo, the solo developer behind Linesmith.
It's for a simple, annoying situation: the video you need (a lecture, a tutorial, an interview, a documentary) is in a language you don't speak. Auto-captions get you part of the way. Dubbing services work, but they charge by the minute.
Linesmith started as a subtitle tool I used myself. When I moved from Windows to Linux, I rebuilt it as a desktop app and added dubbing.
How it works: drop in a video and pick your languages. Speech recognition runs on your computer (Whisper or Parakeet). The AI service you choose translates the lines (Gemini, OpenAI, Claude, DeepSeek, Mistral, Groq, OpenRouter, or a local model in Ollama or LM Studio), and Linesmith checks the translation against the original. You read each line next to the source, fix what you want, then export SRT/VTT, burn the subtitles in, or dub the video. For dubbing it separates the voice from the music, gives each speaker their own voice and fits each line into its original timing.
Because it runs on your machine with your own key, Linesmith doesn't count minutes. You pay your AI provider directly, and Gemini has a free tier.
What it doesn't do: no lip-sync and no macOS. The Windows installer isn't code-signed yet, so SmartScreen will warn you; the site has a short guide.
The first 3 videos are free with every feature, no account needed. I'd like to hear where it breaks: a language that sounds off, a file it can't handle, a step that confused you.