Add subtitles to an online video

This is the light path: all you need is a video URL — no download, no uploading of the original file. The server extracts the audio track and runs recognition and translation directly. It fits the cases where all you have is a link — a demo video, a sample clip on an asset site, a finished file already sitting on object storage or a CDN. Paste an address and get a subtitle file; that is the whole point of this page.

But it does not burn subtitles. If you want a finished video with subtitles on it, use the upload flow on the home page: that path hands the original video to browser-side libass rendering, burns the subtitles into the picture and outputs a ready-to-publish file; the cost is that the original passes through your browser once. The two paths split as "I want a file" vs. "I want a finished video", not "fast" vs. "slow".

Direct video links (mp4, m3u8) and web pages that contain a video tag are supported; recognition covers Chinese, English, Japanese and Korean, and translation covers 20 languages. Media files created during parsing are cleaned up automatically after you leave, but the subtitle text is already saved to your history, so you can come back and download it even after closing the page — this history is visible only to logged-in users.

If you only want to convert a format or adjust timings, you do not need this pipeline: SRT subtitle translator and SRT / VTT converter both run locally in your browser without uploading files. To understand the trade-offs between subtitle formats and platform specs first, read how to choose a subtitle format.