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Subtitle Sphere

A product of Tandis 24 Design Lab

Subtitle Sphere logo

Welcome to Subtitle Sphere!

Revolutionize Your Audio and Video Content with AI-Powered Transcription, Translation, Subtitling, Voice Generation & More.

Local. Private. Affordable. Unlimited. No ads. No cloud. No data collection. No registration. No account.
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What is Subtitle Sphere?

Subtitle Sphere is a comprehensive desktop application and multimedia processing powerhouse that revolutionizes video and audio transcription, translation, AI-generated voice synthesis, and subtitling. Offered with unlimited functionality while ensuring complete data security and user privacy.

Our platform supports both offline and online capabilities: offline transcription, translation, subtitling, voice cloning, and AI voice generation without internet connection, plus real-time transcription, translation, summarization, and cloud-based AI voice generation when connected.

📚 Comprehensive Product Review & Comparison Guide

Want to see how Subtitle Sphere compares to ElevenLabs, Descript, CapCut, DaVinci Resolve, Veed.io, and standalone tools? Download our detailed technical analysis and competitive comparison.

📄

Complete Product Review (PDF)

⬇️ Download PDF Guide

Technologies We Integrated

⚙️ BATCH OFFLINE PROCESSING - POWERFUL AUTOMATION
Batch Audio & Video Transcription Process multiple files simultaneously with OpenAI Whisper - transcribe entire folders automatically
Batch Translation Translate multiple SRT, TXT, PDF, DOCX files at once using Google, Argos, Gemini, or OpenAI
Batch TTS with Kokoro Generate narration for multiple text/SRT files - perfect for audiobook creation with timestamp synchronization
Batch TTS with Chatterbox Process multiple files with voice cloning technology - create consistent narration across entire series
Batch Voice Cloning multiple voice samples efficiently - create voice model libraries for your projects
Batch Audio/Voice Enhancement Improve quality of multiple audio files simultaneously - reduce noise and normalize volume across collections
🎯 Transcription
OpenAI Whisper Open-source speech recognition
Whisper-Google Fusion Our proprietary hybrid model
SpeechRecognition Google Speech Recognition
Speaker Diarization OpenAI Whisper + WhisperX + Pyannote
Speaker-Aware Audio Segmentation Automatically identify speakers and extract their audio separately - perfect for interviews and podcasts
Feature Highlights • Real-time transcription capabilities
• Transcript optimization engine
• Speaker diarization
🌍 Translation
Deep Translator Google Translate integration
Gemini AI Advanced language processing & Premium translation (API key)
OpenAI GPT Advanced language processing & Premium translation (API key)
Argos Translate Offline translation engine
ePUB Translation with Format Preservation Translate ePUB ebooks while maintaining original formatting, chapters, and structure using Argos (offline), Google, Gemini, or OpenAI (Copyright permission required; not for resale or redistribution)
Feature Highlights • Real-time translation
• Multilingual subtitle generation
• eBook translation & processing
🎵 Voice Synthesis
Kokoro TTSOffline High-quality text-to-speech
gTTSGoogle Text-to-Speech
Edge-TTSMicrosoft Edge voices
OpenAI GPT TTSOpenAI voice generation (API key)
Gemini TTSGemini voice generation (API key)
Chatterbox Voice Cloning & TTS (including Turbo)Offline Resemble AI voice generation & voice cloning - create custom voice models
Feature Highlights • Multi-engine TTS
• Voice cloning with Chatterbox
• Customizable AI voices
🎤 Audio Processing
DemucsAI-powered vocal isolation
FFmpegAudio/video processing
Audio Segment ExtractionSelect and extract specific segments from audio files - combine or save separately with frame-accurate control
Audio EnhancementReduce background noise, normalize volume, and improve vocal clarity professionally
Feature Highlights • Vocal isolation (separating vocals from music)
• Audio/video merging and extraction
🎥 Video Processing
Built-in video converterFormat conversion
Orientation correctionFix rotations
Resolution scaling480p → 4K
Cross-platform playbackOptimized for all devices
Video Segment ExtractionPrecisely extract segments from videos with frame-accurate control - create highlight reels or combine selected portions
Feature Highlights • Video segment extraction
• Combine selected segments
📄 Document Processing
SRT to JSON/VTT, PDF to TXTRobust conversion
URL importVideos & transcripts
Subtitle rulesCustomizable timing
Character optimizationEfficient formatting

All these powerful tools, unified in one simple interface - no Python knowledge required.

🎓
Educators & Course Creators
Global learning with multi-language assets, voiceovers, and subtitles
🔬
Researchers & Academics
International accessibility for presentations, interviews, and documentation
🎥
Content Creators
Professional captions, translations, and voiceovers for global audiences
♿
Accessibility Advocates
Multilingual subtitles and AI narration for inclusive content

Our Journey

October 2024 - present

1000
Global Users Served
15+
Integrated Technologies
50+
Features
100%
Unlimited

Latest Release: Version 10.1.0

50+ Professional Features
Cross-Platform Support: macOS (ARM) • Windows 8/10/11

Applications We Power:
Education • Research • Content Creation • Transcription • Translation • Subtitling • AI Narration • Voice Cloning • Vocal Removal • Audio Processing • Video Processing • Document Processing • Text Summarization

Get Started:

Download Subtitle Sphere today and unlock your creative potential!

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