Subtitle Sphere
A product of Tandis 24 Design Lab
A product of Tandis 24 Design Lab
Subtitle Sphere offers both completely offline features requiring no internet or API key and features that require internet connection and API Key. Nevertheless, nothing is uploaded to cloud and nothing is shared with Gemini and OpenAI without your consent.
Subtitle Sphere provides a comprehensive solution for transcribing, translating, and subtitling your videos. With support for various transcription formats, including original transcripts with timestamps, plain text, and a modified format that intelligently merges subtitle segments for better flow, Subtitle Sphere ensures precise transcriptions across multiple languages. The integration of OpenAI Whisper and Whisper-Google Fusion guarantees speed and accuracy in every stage, from transcription to translation.
Effortlessly create customized, high-quality subtitles for your videos with Subtitle Sphere. Adjust the appearance, timing, and position of subtitles to enhance viewer comprehension and match your video's style. Subtitle Sphere now offers enhanced subtitle flow by merging segments intelligently, taking into account punctuation and timing, ensuring a more natural viewing experience.
Convert your video files into accurate SRT subtitle files using OpenAI Whisper and Whisper-Google Fusion technology. Whether you need the original timestamped transcript or a modified format for improved subtitle flow, Subtitle Sphere allows you to generate high-quality subtitles for better accessibility and viewer engagement.
Transcribe your audio files with precision and generate accurate SRT subtitles, perfect for podcasts, interviews, and speeches. Choose from various transcription formats, including the option to merge subtitle segments based on timing, punctuation, and customizable character limits.
Utilize Google's advanced speech recognition technology to transcribe and translate your video content. Generate full-text transcripts and accurate translations in multiple languages, without timestamps or SRT files, making your videos accessible to a broader audience.
Convert your audio files into text and translate them into various languages using Google's speech recognition technology. This feature provides a complete script of your audio content, making it ideal for transcriptions and translations without the need for timestamps or SRT files.
Turn your written scripts or plain text files into fully functional SRT subtitles with ease. Subtitle Sphere streamlines the process of adding subtitles, allowing you to quickly convert text into a subtitle format.
Process live audio streams with simultaneous transcription, translation, and summarization capabilities. This powerful feature combines OpenAI Whisper's speech recognition with OpenAI GPT and Google Gemini's language processing to deliver real-time results. Perfect for live meetings, conferences, interviews, or streaming content. Users can receive instant transcripts, translations in multiple languages, and intelligent summaries of the spoken content as it happens. The system maintains accuracy even with background noise and supports various audio input sources.
Note: Users must provide their own OpenAI and Google Gemini API keys to access this service.
Easily translate your SRT, TXT, PDF, and DOCX files into multiple languages using Google Translate through Deep Translator, Google GEMINI, or OpenAI GPT. PDF and DOCX files will be automatically converted to TXT format before translation to ensure smooth processing.
For Google Gemini and OpenAI GPT translations, users must provide their own API keys to access these services.
Leverage Google Gemini TTS to generate natural-sounding voice narration with access to a wide range of expressive voices featuring emotions and nuanced intonations. Our software supports all the languages that Google Gemini TTS currently offers, enabling you to create rich, dynamic audio content. Personalize your narration by choosing from multiple voices and emotional styles to best match your content's tone. You can create multilingual, multi-speaker audio files by either entering custom text directly, importing your plain text files, or even asking Google Gemini to write the script for you within the software.
Note: Users must provide their own Google Gemini API key to access this service.
Leverage OpenAI GPT TTS to generate natural-sounding voice narration with access to a wide range of expressive voices featuring emotions and nuanced intonations. Our software supports all the languages that OpenAI GPT TTS currently offers, enabling you to create rich, dynamic audio content. Personalize your narration by choosing from multiple voices and emotional styles to best match your content's tone. You can create multilingual, multi-speaker audio files by either entering custom text directly, importing your plain text files, or even asking OpenAI GPT to write the script for you within the software.
Note: Users must provide their own OpenAI GPT API key to access this service.
Experience instant, conversational text-to-speech translation with our real-time chatbot interface. Powered by OpenAI GPT, this feature enables seamless communication across languages with natural-sounding voice output. Simply type your message, and receive immediate translation with high-quality speech synthesis. Perfect for live conversations, customer support, or interactive language learning. The chatbot interface provides a user-friendly experience with customizable voice settings and multiple language support.
Note: Users must provide their own OpenAI GPT API key to access this service.
Leverage Microsoft Edge TTS to generate natural-sounding voice narration in 76 languages with access to over 300 predefined voices. Further personalize your audio by adjusting pitch, speech rate, and volume to suit your content style. You can create multilingual, multi-speaker audio files by either entering custom text directly or importing your own SRT or plain text files. This powerful flexibility allows for dynamic, expressive narration tailored to your video's message.
Leverage OpenAI.fm to generate natural-sounding voice narration with access to a wide range of expressive voices featuring emotions and nuanced intonations. Our software supports all the languages that OpenAI.fm currently offers, enabling you to create rich, dynamic audio content. Personalize your narration by choosing from multiple voices and emotional styles to best match your content's tone. You can create multilingual, multi-speaker audio files by either entering custom text directly or importing your plain text files. This flexibility allows for immersive, emotionally engaging narration tailored to your video's message.
Enhance your videos with professional-grade AI-generated voice narration. Select from a variety of languages and customize voice characteristics, such as speed, pitch, and volume, to tailor the narration to your content's tone. With voice syncing features, the AI narration can be perfectly aligned with your subtitles for a seamless experience.
Generate high-quality voice narration for your audio content in multiple languages. Customize the speed, pitch, and volume of the AI-generated voice to create unique voice variations. The syncing option ensures that your audio narration matches the timing of your subtitles or video.
Create personalized voice models that can replicate specific speech patterns, accents, and vocal characteristics. This advanced feature allows users to clone voices from audio samples and use them for text-to-speech generation, maintaining the unique qualities of the original speaker. Perfect for creating consistent narration, preserving voices for accessibility purposes, or generating personalized audio content. The voice cloning system supports multiple languages and provides fine-tuning options for optimal results.
Note: This feature requires appropriate consent and usage rights for any voice being cloned. Users are responsible for ensuring ethical and legal use of voice cloning technology.
You can now import videos directly from external URLs, such as YouTube, Dailymotion, or Vimeo. Simply provide the URL, and Subtitle Sphere will download the video for you. Please ensure the video is licensed appropriately, under Creative Commons, or complies with the source website's copyright policy.
Subtitle Sphere allows you to import transcripts from YouTube in three different formats: plain text, SRT, and raw timestamps. This feature simplifies the process of working with external content, allowing you to quickly integrate and edit transcripts. Please ensure the video is licensed appropriately, under Creative Commons, or complies with the source website's copyright policy.
Effortlessly convert PDF files into editable TXT and DOCX formats with high accuracy text extraction. This feature preserves the original formatting where possible and handles complex layouts, tables, and multi-column documents. Perfect for making PDFs accessible for further editing, translation, or processing through other Subtitle Sphere features. The converter supports batch processing for multiple files and maintains text quality while ensuring fast conversion speeds.
Easily extract or remove audio tracks from your video files. Whether you need a clean audio-free version or want to isolate the sound for further editing, Subtitle Sphere provides the flexibility to meet your needs.
Combine audio with video using Subtitle Sphere's Audio & Video Merger. You can adjust the speed of either the audio or video to match the duration of the other, and choose to keep the original audio or mute it while adding the new audio.
With the Vocal Remover feature, you can separate vocals from music in an audio file, making it easier to isolate the background music or create karaoke tracks.
The Video Converter in Subtitle Sphere fixes common video distortion issues—particularly helpful for Windows users. It resolves a long-standing problem where portrait videos (9:16), often recorded on iPhones or created with editing apps, are saved as landscape with hidden rotation metadata. This tool re-saves them in true portrait orientation, ensuring they display correctly across all platforms.
In addition, the converter offers flexible resolution control. You can downscale videos to save space (e.g., 480p) or upscale to higher resolutions like 1080p or even 4K for better quality—perfect for editing, sharing, or archiving.
Since many Windows tools ignore rotation metadata, this converter ensures your videos appear exactly as intended, eliminating the need for manual fixes or workarounds.
Generate concise, intelligent summaries of your text content using advanced AI models from Google Gemini and OpenAI GPT. Perfect for condensing lengthy documents, transcripts, or articles into key points and essential information. Users can choose between different summarization styles to meet their specific needs. This feature supports multiple languages and maintains the original context while delivering clear, coherent summaries.
Note: Users must provide their own Google Gemini or OpenAI GPT API keys to access this service.
Subtitle Sphere offers advanced transcription features, including new formats for your transcripts, such as original with timestamps, plain text without timestamps, and a modified format that intelligently merges subtitle segments for a smoother flow. You can further customize subtitle line concatenation by adjusting the maximum characters per line, maximum duration, and the gap between lines. Additionally, Whisper Turbo and Whisper Large Turbo transcription models offer improved accuracy and faster results. Original transcripts and plain text formats are saved for your reference in a folder of your choosing.
Subtitle Sphere uses an intelligent content submission system when working with speech recognition, translation, and text-to-speech APIs. Instead of transmitting entire files, the platform sends only the relevant **text or audio content** — either line-by-line or in optimized chunks — based on **token count** for text and **duration thresholds** for audio. This ensures fast, secure, and compliant API communication across all supported services.
This hybrid content-aware system enables Subtitle Sphere to deliver efficient, scalable, and privacy-conscious API integration — whether processing entire segments, single lines, or intelligently batched chunks.
Users can now easily provide feedback and subscribe to our YouTube channel directly within the app. Stay updated on the latest features and tips by following our content and sharing your thoughts with us.
For added convenience, Subtitle Sphere now includes help buttons and informational sections throughout the platform, providing users with additional guidance and explanations for every feature.