GPT Subtitler

GPT Subtitler is an AI transcriber tool. A web app for translating SRT, VTT and ASS subtitle files into 100+ languages with context-aware AI, and for transcribing audio and video into editable captions. Timing and formatting are preserved, batch projects keep terminology consistent, and you can pick from several AI model providers.

GPT Subtitler is a browser-based workspace for two related jobs: translating existing subtitle files and turning audio or video into editable captions. On the translation side it accepts SRT, VTT and ASS files and moves them between more than 100 languages. On the transcription side it takes a media upload and produces captions you can edit before or after translation. In both cases the subtitle structure, timing and formatting are preserved, so the output drops back into an editing or publishing pipeline rather than needing to be rebuilt from scratch. The feature the product leans on hardest is context. Before translating, you can supply background such as an idiom's meaning, the setting of a scene, or a term's intended sense, and the model uses that to steer word choice. The site demonstrates this with a Spanish line about being "en las nubes": with supplied context the English output resolves the idiom correctly, while a context-free machine translation renders it literally. That is a soft, illustrative example rather than a benchmark, but it captures the intended use case, where a literal rendering would read as nonsense to a viewer. Workflow is straightforward. You add a source (a subtitle file, or media for transcription), pick source and target languages plus a model and translation preferences, refine each line with AI-assisted context, then export in the format you need. A separate batch project path handles multiple files at once and is aimed at keeping terminology and style consistent across an entire series or catalogue. Model choice is not locked to one vendor: the site lists OpenAI, Claude, Gemini, DeepSeek, Grok, OpenRouter and other OpenAI-compatible providers. This puts GPT Subtitler in the territory of subtitle editors with AI translation bolted on, and of generic translation engines pointed at caption files. Its differentiator is the pairing of transcription, translation and batch terminology control in one interface with timing preserved. It suits localization freelancers, video teams handling recurring series, e-learning producers and anyone distributing the same footage to several language markets. It is less suited to buyers who need deep manual subtitle timing tools, since it is positioned as an AI translation and transcription service rather than a full captioning studio.