Subtitles that get
the details right.
TermSub extracts your key terminology — names, brands, technical terms — before translating, so they stay consistent across every scene and every language. Built for documentaries, research, education, and technical content.
No credit card required. Open source.
Built for content where details matter
Documentaries & Interviews
Names, places, and institutions stay consistent across every scene and every language.
Educational Videos
Complex concepts and specialized vocabulary are translated accurately every time.
Research & Lectures
Technical terms, theories, and citations keep their precise meaning in translation.
Technical Content
Product names, APIs, and industry jargon are preserved exactly where they belong.
Political, Social & Historical Content
Ideological terms, movement names, historical references, and sociological concepts keep their precise meaning and context across languages.
Feature Films
Even long-form content stays coherent. TermSub understands genre and context, so characters, locations, and tone translate naturally from opening scene to credits.
TermSub Features
Terminology-first translation
Before translating, TermSub identifies names, brands, and technical terms — then locks them in. Your documentary's protagonist has the same name in every scene, every language.
59 languages
English, Spanish, French, German, Persian (Farsi), Arabic, Hebrew, Japanese, Korean, Hindi, and 49 more.
RTL support
Full right-to-left support for Persian, Arabic, and Hebrew with proper text rendering and subtitle formatting. Built by someone who actually uses it.
Whole-video context
TermSub reads the entire transcript before translating. Tone, style, and terminology stay coherent — start to finish.
Editable subtitle cards
Review, edit, split, merge, and fine-tune every subtitle card before exporting to SRT, VTT, TXT, or JSON.
You stay in control
Upload, review terminology, edit subtitles, export. A feature film in under 10 minutes — with you making the decisions.
How it works
Upload your video
TermSub extracts audio and transcribes with OpenAI Whisper.
Review your terminology
AI identifies names, brands, and key terms. You approve or edit them. This is the step other tools skip.
Translate & export
Full-context translation to 59 languages. Export as SRT, VTT, TXT, or JSON.
Translate your first video free.
30 minutes, no credit card, no account required. Open source — self-host or use our cloud.
*Transcription is powered by OpenAI Whisper; analysis and translation by Google Gemini.