Lossless Subtitle Eraser.
PPT to Narrated Video. 100% Offline.
EchoSubs is a native desktop application that deletes hardcoded subtitles via local AI inpainting and converts PPT/PDF slides to high-quality narrated video. Zero quality loss, 10x faster than web tools, and complete local privacy.
Core Desktop Capabilities
Lossless AI Subtitle Removal
Deep-learning AI inpainting erases burned-in text. EchoSubs only changes subtitle pixels and copies other parts untouched. No re-encode quality degradation, no ugly blurring.
- AI inpainting background reconstruction
- Automatic subtitle detection
- Manual mask adjustments available
- Removes watermarks and logos
- Batch folder processing queue
- Supports MP4, MKV, MOV, AVI, WebM
PPT/PDF to Narrated Video
Import .PPTX, .PPT, or .PDF slides. EchoSubs auto-generates speaker voiceover narration, synthesizes it with 50+ local AI voices, and renders a synchronized MP4.
- Direct PPTX, PPT, PDF imports
- 50+ local AI voices, 30+ languages
- Auto voiceover script generator
- Customize scripts slide by slide
- Processes 50 slides in ~5 mins locally
- Zero cloud queues, 100% private
AI Subtitle Generator
Generate word-level captions locally using Whisper AI models. Edit text directly in the app, burn captions into your video, or export standard subtitle formats.
- Local Whisper model — zero cloud fee
- Export to SRT, VTT, ASS formats
- High-accuracy speech transcription
- Fully customizable font and styling
- Trial mode: subtitle generation with watermark
Desktop App vs Online Competitors
Why local processing outperforms online SaaS platforms for video editors.
| Feature | EchoSubs Desktop | Online SaaS Tools | Basic Cloud Converters |
|---|---|---|---|
| Lossless subtitle removal | ✅ (Passthrough) | ❌ (Full re-compress) | ❌ (Uncompressed raw) |
| Local AI inpainting (no blur) | ✅ | ❌ (Simple blurs) | ❌ (Crop or black bars) |
| 100% Offline execution | ✅ (After activation) | ❌ (Internet required) | ❌ (Internet required) |
| Absolute privacy (no upload) | ✅ (Files stay local) | ❌ (Uploads required) | ❌ (Uploads required) |
| Processing speed | 🚀 10x faster (Local GPU) | ⏱️ Slow (Upload limit) | ⏱️ Slow (Server queues) |
| Pricing model | ✅ One-time purchase | ❌ Monthly subscription | ❌ Pay per credit |
| Srt/Vtt/Ass export support | ✅ | ✅ | ❌ |
Frequently Asked Questions
Protect Your Privacy. Own Your Tool.
Download EchoSubs Desktop. Harness the power of local AI models to strip subtitles, transcribe voice, and turn presentations into videos.
Download EchoSubs Desktop