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Platform overview and user management

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Video Translation & Terminology Management

Click or drag & drop a file

MP4, MOV, AVI, MP3, TXT

Source Language

Target Language

Type	Original	Translation	Standard
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TermSub

Upload – drag & drop a video, audio, or .txt/.srt file (or click the upload area). Max file size is 500 MB.
Choose languages – pick a source language (or Auto-detect) and a target language. Type in the dropdown to search 59 languages by English or native name.
Enter your OpenAI API key – paste your key in the field; it is saved only in your browser.
Click Start – TermSub uploads the file and runs transcription, terminology analysis, and translation in the background. Monitor progress in the Activity Log.
Review & refine – edit extracted terms for consistency, then tweak subtitles in the timeline (edit text, split/add/remove segments, or use Find & Replace).
Export – download SRT, VTT, TXT, or JSON files when you are done.