AI Voiceovers for TikTok & YouTube Videos

Q: Do I have to disclose AI voiceovers on TikTok and YouTube?

Both platforms require labeling realistic synthetic media: YouTube has an 'altered or synthetic content' disclosure at upload, and TikTok requires an AI-generated content label. A voiceover that sounds human counts. Label it — the penalty for not doing so is worse than the label.

Q: Which format should I export for video editing?

WAV if your editor handles it (uncompressed, cleanest to cut), MP3 for maximum compatibility and small size. CapCut, iMovie and Premiere accept both. Avoid re-encoding chains: generate in the format you'll edit in.

Q: How long a voiceover can I generate at once?

Up to 4,000 characters per generation — several minutes of speech, far more than a typical short-form script (a 60-second TikTok script is about 150 words). For long YouTube narration, generate per section and butt the clips together in the editor.

Half the short-form videos in your feed are narrated by AI — because recording your own voice means a quiet room, a decent mic, and seventeen takes. Typing a script takes one. Here's the workflow, end to end.

Step 1: write for the ear

Short sentences. Spoken text needs more full stops than written text.
Punctuate the pauses. The AI reads commas as breaths and dashes as beats — write the rhythm you want.
Time it: ~150 words per minute at Normal rate. A 60-second TikTok is a 150-word script; the 4,000-character composer holds several minutes.

Step 2: generate the audio

Paste your script into Voiceify.
Pick the voice for the job — Nova for energetic hooks, Onyx for authoritative explainers, Fable for storytimes, Sage for how-tos. Preview each with your actual opening line (full comparison in the voice guide).
Set the speaking rate. Short-form usually wants Slightly Fast or Fast — pace holds attention; documentary narration wants Normal.
Choose WAV (cleanest for editing) or MP3 (small, universal) and convert.

Step 3: into the editor

Share → Save to Files (or share straight into the editor app).
In CapCut: + → Audio → From device → your file. In iMovie/Premiere: import as an audio clip.
Cut your visuals to the narration, not the other way round — the voiceover is the spine of the video.
Duck any music −10 to −15 dB under the voice so words stay intelligible on phone speakers.

Disclose it. YouTube requires marking realistic altered/synthetic content at upload; TikTok requires the AI-generated label. A natural-sounding AI voiceover qualifies on both. It costs one checkbox — an unlabeled video that gets flagged costs reach, or the account.

Why this beats in-app TTS voices

Platform-native text-to-speech voices are instantly recognizable memes — fine for jokes, wrong for a brand. A natural AI voice with adjustable pacing reads as production value, and because every generation lands in your history with its settings, you can keep the same voice-and-rate combination across an entire series. Consistency is what makes a channel sound like a channel.

Narrate your next video with Voiceify

Script in, MP3/WAV out — 13 voices with previews. Free to try on iPhone & iPad.

Download on the App Store

FAQ

Do I have to disclose AI voiceovers on TikTok and YouTube?

Yes — both platforms require labeling realistic synthetic audio. One checkbox at upload.

Which format should I export for video editing?

WAV for the cleanest edit, MP3 for size and compatibility. CapCut, iMovie and Premiere take both.

How long a voiceover can I generate at once?

4,000 characters — several minutes. Generate long narration per section and join the clips in the editor.