AddSubtitle

AddSubtitle is an online AI video editor for generating subtitles, translating clips into 100+ languages and rewriting or dubbing speech. It supports bilingual captions, caption styling and a text-based proofreading flow, aimed at creators, teachers and social publishers working across languages.

AddSubtitle is a browser-based video tool built around three connected jobs: generating subtitles, translating existing video into other languages, and rewriting or dubbing spoken content. The product positions itself as an online editor rather than a download, so creators can move from a raw clip to a finished, captioned, multilingual video without switching between separate transcription, translation and editing apps. The subtitle side of the tool targets accuracy first. AddSubtitle claims support for more than 100 languages at 99.9 percent accuracy, and it handles both single-language and bilingual captions. That bilingual option is the practical hook for course creators and social publishers who want one video to serve two audiences at once, for example a domestic feed and an export market. Styling controls go beyond plain white text: fonts and caption designs can be adjusted, which matters for vertical vlogs and short-form formats where captions are part of the visual identity rather than an accessibility afterthought. The translation and rewrite features push the tool closer to a localization suite. Video translation aims to keep the creator's own voice while switching languages, and Video Rewrite lets the text script be edited before the voice and lip movement are regenerated to match. The workflow described on the site is deliberately shallow: pick a feature, upload the video, edit with the AI tools, then download or share a link. Proofreading translations happens in a text editor, which keeps corrections fast and avoids re-rendering just to fix a phrase. AddSubtitle is aimed at YouTubers, online teachers, social media marketers and small businesses publishing across borders, with the site citing more than 10,000 creators and businesses. It fits between dedicated subtitle editors and heavier localization platforms: lighter than studio dubbing suites, more complete than auto-caption features baked into a single video host. Everything runs in the browser and the entry point is free.