Add a voice-over in 3 steps
No recording equipment needed. Upload your PPTX and download a narrated presentation in about a minute.
Upload Your Presentation
Drop your PPTX file into the tool. Our AI extracts the slide text and speaker notes for you.
AI Writes & Voices Each Slide
The AI writes a narration script slide by slide (using your speaker notes when you have them) and voices it with natural pacing and intonation.
Download Your Narrated Presentation
Get your PowerPoint back with the voice-over embedded on each slide, playing automatically as you present - plus the complete narration as an MP3.
Built for accurate, natural narration
Powered by AI
Our AI generates natural-sounding narration from your slide content using advanced text-to-speech models. The voice flow matches the natural rhythm of spoken delivery.
FREE & No Sign Up Required
100% free with no account required. Upload your presentation and get a narrated copy back in under a minute.
Safe and Secure Processing
We process every PowerPoint you upload securely, and delete your file and the generated narration after delivery.
Multi-language Support
The AI generates narration in the same language as your slides. It supports English, Spanish, German, French, and more.
Reduce Time on Recording
Skip the hours of recording and re-recording. Our AI generates studio-quality narration that's ready to play across all slides.
Why choose SlideSpeak?
Powerful, fast and reliable. Our FREE AI audio narration generator.
Natural-Sounding Voices
Our AI voices sound human, with proper pacing, emphasis, and intonation instead of a robotic, flat readout.
Multiple Languages & Accents
Generate narration in dozens of languages and regional accents to reach any audience worldwide.
Free to Use
You don't need an account, and there are no daily limits or watermarks. Use every feature on the free tier as often as you need.
Fast Processing
Our optimized server-side pipeline delivers a result in seconds. There's no queue and no waiting room: we process your file the moment you upload it.
Secure and Private
We encrypt every upload in transit and delete your files right after processing. We never store them, share them, or use them to train models.
No Software Needed
It runs in your browser on any device: Mac, Windows, Linux, Chromebook, or iPad. No installs, no plugins, no signups.
Blazing fast, even for large files
Our server-side engine narrates most presentations end-to-end in under a minute, processing structure, content, and styling in parallel.
<60s
Avg. time
99.9%
Generation accuracy
500+
Slides supported
75K+
Presentations narrated
How We Stack Up
See why users choose SlideSpeak to add AI narration to PowerPoint.
| Features |  | ElevenLabs | Murf.ai | PowerPoint Manual |
|---|---|---|---|---|
| Free to use | Free | Free credits | Free trial | Paid Office |
| No sign-up required | No signup | Required | Required | Microsoft account |
| Direct PPTX integration | Native | Manual import | Slide narration | Native |
| AI auto-generated voice | Automatic | Yes | Yes | Manual recording |
| Multi-language | Yes | 30+ languages | Yes | Your voice only |
| Speed | <60 seconds | Per-slide editing | Per-slide editing | Hours of recording |
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Frequently Asked Questions
Everything you need to know about generating AI audio narration for your presentations.
Turn any idea into a presentation — free to try
An AI presentation platform to turn ideas, PDFs, Word, and Excel files into ready-to-present slides.
