Checksub

Checksub is an AI subtitle generator and dubbing platform designed to help you reach more viewers with multilingual video. It can auto-create and animate subtitles, translate your subtitles into 200+ languages, and dub your videos with realistic AI voices so speakers are synchronized to the video.

For subtitles, Checksub supports automatic subtitling and can generate subtitles from a script—syncing them to your timeline. You can then refine your output in an advanced online editor, edit and regenerate any sentences, and customize subtitle styling and animations. If you prefer, you can export burned-in subtitles directly into the video or export subtitle files as well.

For localization, Checksub translates subtitles using a workflow built for subtitling, and then generates AI dubbing that replaces only the original voice while keeping the original audio background (music and atmosphere). Features include voice cloning (one-click voice replacement in 30 languages) and voice isolation, which separates background noise/music from the original voices to help improve dubbing quality.

You can start with a free trial that includes free credits to test features. Credits allow you to translate 1 hour of video, and you can explore all Checksub features while you have remaining credits.

How does Checksub’s free trial work?

The free trial gives you free credits that let you translate 1 hour of video. Use the credits to test Checksub features, including subtitles, translation, and AI dubbing.

How does video translation work in Checksub?

Checksub first transcribes the audio, then translates the transcription into your target language. After translation, it generates AI dubbing that creates a natural, synchronized replica of the speaking voices.

Why do I need original-language subtitles before translating?

Checksub generates captions in the original language first, then performs automatic translation from those subtitles. This helps keep translation quality higher and avoids having to redo work separately for each target language.

Can I edit the subtitles after they’re generated?

Yes. After subtitles or dubbing are generated, you can edit and regenerate any sentences until they’re right. You can also customize style and animations, and export as burned-in subtitles or as subtitle files.

What is voice cloning in Checksub?

Voice cloning lets you replace your original voice-over with a cloned voice using one click, available in 30 languages. This is used for AI dubbing of the speaking voice.

How does voice isolation help with AI dubbing?

Voice isolation separates music and background noise from the original voices. That way, Checksub can replace the voice while keeping the original audio atmosphere intact.