Will the timing stay in sync?

Yes. All timecodes are preserved exactly as they are in the original file. The translated text is optimized to fit within the same time windows.

Which subtitle formats are supported?

We support SRT, VTT (WebVTT), ASS, and SSA formats — covering all major subtitle standards for movies, TV shows, and online videos.

Are styling tags preserved?

Yes. Bold, italic, color, positioning, and other formatting tags in ASS/SSA files are maintained in the translated output.

Can I create multilingual subtitles?

Yes. Translate your subtitle file into any of our 30+ supported languages. You can create multiple translated versions from a single source file.

What about embedded subtitles?

We work with standalone subtitle files (SRT, VTT, ASS, SSA). For embedded subtitles, extract them first using tools like FFmpeg or HandBrake.

Can it handle long movies or TV series?

Yes. Whether it's a 2-hour movie or an entire TV season's worth of subtitles, our system handles files of any length.

Translate Your Subtitle & Caption Instantly with AI

Upload your Subtitle & Caption and get an accurate, professionally formatted translation in minutes. Powered by advanced AI that understands context and preserves your document structure.

100+ Languages

AI-Powered

Formatting Preserved

Easy to Start

Drag and drop files here or click to upload

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Supported file formats: EPUB / PDF / DOCX / TXT / SRT / MOBI etc. Maximum file size: 300MB

Try for free — translate up to 10,000 words

Trusted by researchers and professionals at

Tsinghua University

Peking University

Fudan University

Zhejiang University

Tsinghua University

Peking University

Fudan University

Zhejiang University

Tsinghua University

Peking University

Fudan University

Zhejiang University

Why Choose BookTranslator for Subtitle & Caption Translation

Timecode Preservation

All timestamps and timing information are preserved exactly, ensuring translated subtitles sync perfectly with the audio/video.

Speaker Identification

Speaker labels and dialogue attribution are maintained so viewers always know who is speaking.

Line Length Control

Translations are optimized for subtitle display, respecting character limits and line breaks for comfortable reading speed.

Style Tag Support

Formatting tags for bold, italic, color, and positioning in ASS/SSA files are preserved in the translated output.

AI-Powered Subtitle & Caption Translation

We use the latest large language models—not outdated rule-based engines—to deliver translations that truly understand your content.

State-of-the-Art LLM Models

Powered by the latest AI language models that understand grammar, idioms, and domain-specific terminology far beyond traditional machine translation.

Context-Aware Translation

LLMs read entire paragraphs and chapters, not isolated sentences. This ensures pronouns, references, and tone stay consistent throughout your document.

Multi-Model Architecture

Different models excel at different languages and domains. Our system automatically selects the best model for your content to maximize quality.

Superior to Traditional MT

Powered by the latest AI language models — not legacy machine translation. Technical terms, idioms, and domain jargon are translated accurately.

Why Choose BookTranslator

10x Faster Than Manual Translation

Translate an entire Subtitle & Caption book in minutes, not weeks. Our AI processes thousands of words per second while maintaining context and accuracy.

Pay Only for What You Use

Translate up to 10,000 words free. No subscription needed — pay only for what you use with transparent pricing.

Context-Aware AI Translation

Unlike generic translators, our AI understands document context — technical terms, literary style, and domain-specific vocabulary are translated accurately.

Email Delivery & Easy Access

Translated files are delivered to your email automatically. No account required for basic translations. Download anytime from your history.

Frequently Asked Questions About Subtitle & Caption Translation

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Your Subtitle & Caption file, translated in minutes

Drop your file, pick a language, and download. It's that simple. Try free — no credit card required.

Try for free — translate up to 10,000 words|Formatting Preserved