Async team updates
Narrate a deck once, share the MP4 — beats a 30-minute call across timezones every week.
For presenters
Free Text to Speech for PowerPoint
Turn your speaker notes into natural AI narration. Drop the WAV straight into PowerPoint, Google Slides, or Keynote.
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Presenters & enablement
Narrated decks, finished in minutes
Recording your own voice for a 30-slide deck is a three-hour commitment. FreeTextoSpeech turns speaker notes into studio-quality narration in a few minutes — perfect for async team updates, conference pre-records, sales demos, and training materials.
Related use cases
The quick answer
Paste your speaker notes, pick Jessica or Nicole for corporate tone, generate, and Insert → Audio → Audio on My PC into PowerPoint. Set Playback to Automatically, hide the speaker icon, repeat per slide, then File → Export → Create a Video.
In four steps
How to narrate a PowerPoint
- 01
Copy speaker notes
Grab the speaker notes from slide 1 — keep slides separate so each WAV maps to a single slide.
- 02
Generate the narration
Paste into the tool, pick a voice (Jessica or Nicole for corporate tone), and download the WAV.
- 03
Insert into PowerPoint
Insert → Audio → Audio on My PC. Place the clip on slide 1, set Playback to Automatically, hide the speaker icon.
- 04
Repeat & export to video
Repeat for each slide. Then File → Export → Create a Video to bake narration into a training MP4.
When to use it
What teams ship with it
Sales & demo decks
Send polished narrated decks to prospects who prefer self-paced over scheduled calls.
Conference pre-records
Record once, submit to multiple events. Rewrite a slide and regenerate that one WAV — no re-recording.
Training & onboarding
Build LMS-ready narrated decks for new-hire orientation, compliance, and product enablement.
Voice guide
Voice picks for slide narration
Different decks need different voices. Six picks across US and UK accents covering sales pitches, internal updates, long pre-records, and executive announcements.
01 US
Sarah
Clear presenter
Best for
Sales decks and customer-facing pitch narration. Confident pacing, low filler energy. The default if you do not know what to pick.
02 US
Adam
Warm explainer
Best for
Internal team updates, all-hands recap decks, and product walkthrough videos. Approachable without sliding into casual.
03 US
River
Smooth narrator
Best for
Long decks (40+ slides), conference pre-records, and webinar recordings where listener fatigue is the real enemy.
04 US
Liam
Neutral US
Best for
Investor updates, board decks, and financial readouts where the slide content should carry the weight, not the narrator.
05 UK
Bella
Friendly UK
Best for
Marketing and brand decks where a UK voice differentiates from a US-saturated channel. Works well for product launch teasers.
06 UK
Daniel
Authoritative UK
Best for
Executive announcements, investor pre-records, and any deck where a deliberate, formal cadence matches the gravity of the message.
Want to hear them? Browse all 54 voices →
Best practices
Slide narration tactics that hold up
Per-slide embed workflow, animation sync, MP4 export settings, file-size triage on large decks, kiosk-mode loops, and punctuation tricks for pacing on bullet points.
- 01
Embed per slide via Insert > Audio
Generate one WAV per slide rather than a single track for the whole deck. PowerPoint: Insert > Audio > Audio on My PC, drop on the slide, set Start: Automatically, tick Hide During Show. Per-slide audio means re-recording one slide stays a one-slide change — the rest of the deck is untouched.
- 02
Sync narration to slide transitions
In the Animations pane, set the slide advance to "After" with the duration matched to your WAV length plus 0.3s of breathing room. PowerPoint shows the audio length on the timeline — round up. For builds and bullet reveals, place each on a click trigger and use the audio cue points to fire animations on time.
- 03
Export as MP4 with embedded audio
File > Export > Create a Video. Pick "Use Recorded Timings and Narrations" so PowerPoint bakes per-slide audio into the MP4. For HD output choose 1080p; 4K balloons file size for marginal gain on slides. Exported MP4s play anywhere — LinkedIn, YouTube, Vimeo, internal LMS — without requiring PowerPoint at the other end.
- 04
Watch file size on large decks
WAV at 24 kHz runs roughly 3 MB per minute. A 30-slide deck at two minutes per slide adds ~180 MB of audio to the .pptx. For shared files, compress to MP3 (any free converter) before insertion — file shrinks 5-10x with no perceptible quality loss for narration. Or distribute the MP4 export instead of the deck.
- 05
Build kiosk-mode loops for trade shows
Slide Show > Set Up Slide Show > Browsed at a kiosk (full screen). Set every slide to advance after the audio finishes plus a short pause. The deck loops on its own at the booth — no operator. Pair with Bella or Sarah on a clean voice, no music underneath, so the booth audio stays intelligible in noisy halls.
- 06
Pacing tricks via punctuation
The model respects punctuation as pacing. Commas add a short pause; periods longer; ellipses... slightly longer still. For dramatic bullet pacing, separate ideas with periods rather than commas. For acronyms, write them spaced ("A P I" reads as letters; "API" may read as "ay-pee-eye"). Test, listen, regenerate — at zero cost per regeneration this is cheap to iterate.
Honest comparison
Vs PowerPoint built-in Read Aloud
PowerPoint ships with Read Aloud and Speaker Coach. Both use OS TTS voices, both play only inside the live app — useful for proofreading, useless for shipping a narrated deck or exporting a training MP4.
Feature
FreeTextoSpeech
PowerPoint Read Aloud / Speaker Coach
Voice naturalness
Built-in PowerPoint Read Aloud uses OS TTS voices, generally robotic and flat
Voice variety
Limited to whatever voices are installed on the presenter's OS — usually 1-3 per language
Exportable audio file
Read Aloud and Speaker Coach play in-app only; no audio file you can keep
Commercial use
OS TTS voices have varied EULAs; commercial redistribution often unclear or restricted
Embed per-slide for auto-play on slide show
Read Aloud requires the live PowerPoint app to read; nothing fires on a shared or exported deck
Works in Google Slides and Keynote
PowerPoint Read Aloud is PowerPoint-only by definition
Cost
Bundled with PowerPoint license; only available where the presenter has the live app
Voice naturalness
FreeTextoSpeech
54 Kokoro neural voices — indistinguishable from a recorded human in most listening tests
PowerPoint Read Aloud / Speaker Coach
Built-in PowerPoint Read Aloud uses OS TTS voices, generally robotic and flat
Voice variety
FreeTextoSpeech
54 voices, 9 languages, distinct accents (US, UK) and tones (warm, formal, neutral, smooth)
PowerPoint Read Aloud / Speaker Coach
Limited to whatever voices are installed on the presenter's OS — usually 1-3 per language
Exportable audio file
FreeTextoSpeech
Downloadable 24 kHz WAV — embed per slide, ship in MP4 export, reuse in other tools
PowerPoint Read Aloud / Speaker Coach
Read Aloud and Speaker Coach play in-app only; no audio file you can keep
Commercial use
FreeTextoSpeech
Allowed — sales decks, paid courses, client deliverables, YouTube uploads
PowerPoint Read Aloud / Speaker Coach
OS TTS voices have varied EULAs; commercial redistribution often unclear or restricted
Embed per-slide for auto-play on slide show
FreeTextoSpeech
WAV inserts on a slide and auto-plays in Slide Show mode — works in shared decks too
PowerPoint Read Aloud / Speaker Coach
Read Aloud requires the live PowerPoint app to read; nothing fires on a shared or exported deck
Works in Google Slides and Keynote
FreeTextoSpeech
Yes — same WAV (or MP3 converted) imports natively into Google Slides and Keynote
PowerPoint Read Aloud / Speaker Coach
PowerPoint Read Aloud is PowerPoint-only by definition
Cost
FreeTextoSpeech
Free, no signup
PowerPoint Read Aloud / Speaker Coach
Bundled with PowerPoint license; only available where the presenter has the live app
Comparison reflects the documented behavior of PowerPoint's built-in Read Aloud and Speaker Coach features as of the page's last review. Microsoft updates these features periodically — confirm current behavior in your version of PowerPoint.
FAQ
Frequently Asked Questions
01 How do I add FreeTextoSpeech audio to PowerPoint?
Generate and download your WAV, then in PowerPoint choose Insert → Audio → Audio on My PC. Select the WAV and drag the speaker icon off-slide so it does not show during presentation.
02 Can I use this for Google Slides too?
Yes. Google Slides does not accept WAV directly; upload the WAV to Google Drive, then Insert → Audio → pick the file. Alternatively convert WAV to MP3 with any free converter and upload that instead.
03 Will my narration auto-play when the slide loads?
Yes, if you set the audio Playback to Automatically or In Click Sequence in PowerPoint. Hide the speaker icon for a clean presentation.
04 Is there a character limit per slide?
FreeTextoSpeech accepts 5,000 characters per request, which is plenty for a typical slide. Generate one WAV per slide and place each on its own slide.
05 Can I use this for training videos exported from PowerPoint?
Yes. Once the audio is embedded, use PowerPoint's File → Export → Create a Video option to produce a training MP4 with your AI narration baked in.
06 How do I embed audio per slide in Google Slides specifically?
Generate the WAV (or convert to MP3 with any free converter — Google Slides accepts both, though MP3 is more reliable). Upload to Google Drive in a folder shared with anyone-with-the-link viewer access. Open the slide, Insert → Audio, pick the file from Drive. Click the speaker icon, open Format options, set "Start playing: Automatically," tick "Hide icon when presenting," and set volume. Repeat per slide.
07 Will the audio still play when I share the deck as a read-only link?
Yes for both PowerPoint and Google Slides, with one caveat: the audio file must be accessible to the viewer. In Google Slides the WAV/MP3 in Drive must be shared with the same audience as the deck (or set to anyone-with-the-link). In PowerPoint Online and OneDrive-shared decks, audio inserted via Insert → Audio → Audio on My PC is embedded in the .pptx and travels with the file — no extra share step.
08 What audio formats do Keynote and PowerPoint accept?
PowerPoint accepts WAV and MP3 natively (also M4A, AAC, AIFF). Keynote accepts WAV, MP3, M4A, AAC, and AIFF. FreeTextoSpeech outputs 24 kHz WAV, which works in both without conversion. For decks shared as files, MP3 produces a smaller .pptx or .key bundle; for highest-fidelity narration, stick with WAV.
Still wondering? Get in touch →
Keep going
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Text to MP3
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Audio format
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Lossless 24 kHz WAV — the format PowerPoint accepts natively.
Try it now
Stop re-recording slide narration.
Generate natural AI voiceovers for your deck — free.