What is SubtleSubtitle?

SubtleSubtitle is an AI-powered subtitle and caption generator that automatically transcribes video and audio files, generates properly segmented subtitles using LLM-based semantic splitting, and translates them into bilingual formats (English and Chinese). It features a proprietary sliding-window translation algorithm for narrative consistency and a terminology management system for domain-specific accuracy.

How is SubtleSubtitle quota calculated?

Each processed file consumes 1 file credit. Videos over 30 minutes cost 1 credit per 30-minute segment (rounded up). SRT-only translation consumes 1 credit regardless of length. After package quota is used up, you can continue via pay-as-you-go at ¥0.80 per minute with a ¥2.00 minimum per video.

What video and audio formats does SubtleSubtitle support?

SubtleSubtitle supports all major video formats including MP4, MOV, MKV, AVI, and WebM, as well as audio formats including MP3, WAV, AAC, and FLAC. You can also upload existing SRT files for translation-only processing.

How much does SubtleSubtitle cost?

SubtleSubtitle offers four lifetime packages: Starter ($3.99 for 10 files), Standard ($11.99 for 50 files), Professional ($25.99 for 200 files), and Lifetime ($99.99 for unlimited access forever). All packages never expire. Pay-as-you-go is also available at ¥0.80 per minute via Alipay.

Can I edit translations manually in SubtleSubtitle?

Yes. SubtleSubtitle includes a terminology confirmation step where you can review, keep, or modify how specific technical terms are translated before the final subtitle generation. You can also adjust timestamps and style subtitles before export.

How does SubtleSubtitle translation work?

SubtleSubtitle uses a proprietary sliding-window translation algorithm with 25-segment context windows and 10-segment overlap. The three-phase translation process (Past-Present-Future context) ensures narrative consistency and accuracy. The system also performs background context extraction and pre-translation research for domain-specific accuracy.

AI-Powered Subtitling

The Subtle Art of Subtitles

Experience Subtly Perfect translations with our context-aware sliding window algorithm. From transcription to stylized subtitles, we handle every nuance.

50+ Lifetime Users

1,000+ Paid Users

10,000+ Subtitles Generated

PROJECT_V01.MP4

“The art of subtlety.”

Ai Processing

Precision in 5 Steps

Our pipeline ensures every word is captured, understood, and translated with context.

Precision Transcription

Context Extraction

LLM analyzes video background and context, enhanced by web search.

Term Confirmation

Intelligent extraction of key terms with user control over translation strategy.

Semantic Segmentation

Sentences split by meaning and rhythm, not just punctuation.

Sliding Window Translation

Past-Present-Future context window ensures consistency and flow.

Why SubtleSubtitle?

Built for creators who demand perfection.

Sliding Window Algorithm

An industry-first 3-stage context window (Past-Present-Future) ensures that every sentence is translated with full awareness of the narrative flow.

Active

Term Control System

Don't let AI guess your jargon. Review, keep, or translate specific technical terms before the final generation.

Keep

Translate

Tone Customization

From formal education to humorous vlogging. Define the persona of your subtitles to match your video's soul.

Multi-Format Output

Export standard SRT for captions or advanced ASS for stylized, bilingual typography.

SRT

ASS

Simple, Lifetime Pricing

Pay once, use forever. No monthly subscriptions.

LIMITED LAUNCH

Lifetime

Pay once, unlimited access forever.

We're looking for our first Lifetime users. Your feedback will directly shape the product. We'll customize features based on your needs.

Unlimited file processing
All features unlocked forever
Priority access to custom features (WeChat: edgemaxlgy112112)
Early access to new updates
Dedicated support

¥688/ Lifetime Access

Pay as you go

When package files are used up, upload first and pay per file by video duration. Alipay only.

Price per minute

¥0.80

Minimum per video

¥2.00

Best Value

Standard

¥88/ 50 files

Ideal for regular content creators.

50 files included
Everything in Starter
Priority processing
Term confirmation system
Tone customization

Only ¥0.94/file

Professional

¥188/ 200 files

For power users and studios.

200 files included
Everything in Standard
Highest priority processing
Dedicated support

Frequently Asked Questions

Each processed file consumes 1 file quota (videos over 30 minutes cost 1 credit per 30 minutes). After quota is used up, you can continue via PAYG (¥0.80/min, minimum ¥2.00).

We support all major video and audio formats including MP4, MOV, MKV, MP3, and WAV.

Yes, our interactive editor allows you to refine translations, adjust timestamps, and style subtitles before export.