What languages does CantoSub AI support?

It supports Cantonese, Mandarin, English, and more, with LLM-powered translation to other languages. Cantonese recognition is deeply optimized to understand slang, colloquialisms, and code-switching.

What is the custom glossary for?

You can build a custom dictionary with brand names, proper nouns, and industry terms. The AI prioritizes these entries to improve recognition accuracy and consistency.

Is there a free trial for new users?

New users receive 30 minutes of free trial credit with no credit card required and can cancel anytime.

CantoSub AI

Q: Which editing software are the exported subtitle formats compatible with?

It supports .srt, .fcpxml, .txt, and other mainstream formats, compatible with Premiere Pro, Final Cut Pro, CapCut, DaVinci Resolve, and more for seamless workflow integration.

CantoSub AI is a Hong Kong-developed subtitle tool optimized for Cantonese. It understands slang and colloquialisms, auto-converts to written language, supports .srt and .fcpxml formats, and integrates with major editing software.

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Summary

CantoSub AI is an AI subtitle generation platform developed by a Hong Kong tech startup, designed for Cantonese content creators. It auto-generates professional subtitles in minutes, supports Cantonese, Mandarin, English, and offers one-click multi-language translation.

What is CantoSub AI?

CantoSub AI is an intelligent subtitle tool deeply optimized for Cantonese scenarios. The platform accurately understands Cantonese colloquialisms, slang, and code-switching, automatically converting spoken language into natural written text or translated versions while reducing mistranslations and hallucinations. It supports custom glossaries for brand names, proper nouns, and industry terms to improve recognition accuracy. Export formats include .srt, .fcpxml, and .txt, compatible with Premiere Pro, Final Cut Pro, CapCut, DaVinci Resolve, and other mainstream editing software.

Core Capabilities

Cantonese slang and colloquialism recognition: Accurately identifies spoken language, slang, and code-switching
Spoken-to-written conversion: AI auto-converts to natural written language
Custom glossary: Build your own dictionary for brand names, proper nouns, and terminology
LLM multi-language translation: Advanced models deliver accurate, natural translations
Smart subtitle segmentation: Auto-splits into optimal lengths for readability and pacing
Multi-format export: Supports .srt, .fcpxml, .txt for seamless integration with major editing tools

Pros

Deeply optimized for Cantonese with high recognition accuracy
Auto-converts spoken language to written form, reducing manual editing
Custom glossary ensures consistency for proper nouns
Seamless integration with mainstream editing software workflows
New users get 30 minutes free trial, no credit card required

Positioning & best fit

CantoSub AI is built for Cantonese content creators who need fast, professional subtitle generation. The platform automates subtitle workflows with AI, dramatically boosting production efficiency and viewer experience.

YouTubers and KOLs: Quickly add accurate Cantonese subtitles to improve audience engagement
Video production teams: Cut down transcription time, focus on creativity and editing
Corporate training and marketing: Add multi-language subtitles to training videos and promotional content
Educators: Generate clear, readable subtitles for instructional videos