What is Addsubtitle?

Addsubtitle is a browser-based AI tool that translates video content, dubs voices, and auto-generates subtitles in over 100 languages with 99.9% accuracy. It lets creators edit videos as easily as editing a document — rewriting spoken words, syncing lip movements, and styling captions — all without leaving the browser.

Who it's for

• Content creators who want to repurpose videos for global audiences on TikTok, YouTube, and Instagram without manual translation.
• Online educators who need accurate multilingual subtitles for course materials and meeting recordings.
• Social media marketers who require fast, polished captions and voice dubbing to boost engagement across platforms.

Key features

Multilingual subtitles with one-click translation

Generate subtitles in 100+ languages instantly. The system delivers top-tier translation accuracy, making it suitable for everything from casual vlogs to professional online courses. Bilingual subtitle support is also available for viewers who prefer side-by-side text.

Custom subtitle styling

Move beyond plain captions. You can customize every word with vibrant styles, beautifully crafted fonts, and flexible design options that work across 100+ languages. This feature is ideal for vlogs and viral videos where visual appeal matters.

Video Rewrite with voice and lip sync

Edit the spoken text in any video, and Addsubtitle automatically transforms the voice to match the new script while keeping lip movements perfectly synced. This turns video editing into a text-based workflow — no complex timeline adjustments needed.

Voice dubbing and video translation

Translate your original video while preserving your voice. The AI adapts the audio to sound natural in each target language, helping you reach global audiences without re-recording. The same creative video can speak every language.

What stands out

"Its AI captioning is the most accurate I've seen on the market, and it takes my video content to the next level."

This quote from a senior video blogger reflects the core advantage: 99.9% accuracy across 100+ languages, combined with the ability to rewrite video dialogue as easily as editing a document. The lip-sync and voice adaptation features go beyond standard subtitle tools, making it a complete video localization suite in one browser tab.

Worth checking out if…

You regularly produce video content for multilingual audiences and want to eliminate manual subtitling, dubbing, or re-recording. Addsubtitle is especially useful if you need fast turnaround on social media posts, online course materials, or any video where polished captions and voice translation can expand your reach.