Brix
Sidekick made of enthusiasm and bad ideas
Voice category
Cartoon Character Voice Generator
Cartoon voices live or die on contrast. A tiny frantic sidekick next to a slow enormous villain is funny; two medium voices are not. CastDub lets you cast the whole spread in one project, hear them against each other immediately, and swap anyone who is not pulling their weight.
Four voices to start from
Pip
Small chaotic gremlin who means well
Grit
Monster with a chest cavity the size of a bus
Bellhop
Comic relief NPC who repeats himself on purpose
Samples are placeholders while the public demo audio is produced. Every voice is available on every plan — the library is not a paywall.
Contrast is the whole craft
Traditional animation studios cast a cartoon ensemble the way a composer writes for instruments: they want the parts to be separable. You can hear this in any long-running series — the characters occupy different pitch bands, different speaking speeds and different amounts of air. Nothing about that requires expensive voices. It requires deliberate spread.
When a home-made cartoon soundtrack feels muddy, the cause is almost always that every character was cast from the same narrow band of pleasant, neutral voices. The fix is uncomfortable at first: pick one voice that is too high, one that is too low, and one that talks too fast. Played back in sequence they will feel exaggerated. Played back in a scene they will feel like characters.
Writing lines that a synthetic voice can perform
Three habits make a big difference. First, one intention per line — a line that swings from delight to horror will be rendered as an average of both. Split it. Second, punctuation is direction: a full stop makes a real pause, an ellipsis makes a longer one, and a question mark lifts the end of the phrase. Third, write the interjections out. "Ugh." on its own line becomes a performance; "(groans)" becomes nothing, because the renderer speaks text, not stage directions.
The fourth habit is less obvious. Cartoon scripts are full of names, invented words and onomatopoeia, and those are exactly what a text-to-speech engine guesses wrong. Check the invented words first, correct the pronunciation once, and it stays corrected for the whole project.
From scene to finished cartoon
Most people working alone build the audio before the picture, because animating to a locked soundtrack is enormously easier than the reverse. That workflow suits this tool well: get the performance right, export the stems, then animate the mouths to audio that is not going to change.
If your workflow is the other way round and you already have picture, use the subtitle export to place lines against the timeline, then adjust pace per line to fit the gaps. It is fiddly, but it is faster than re-recording a human.
What this will not do
It will not imitate a specific commercial cartoon performer, and we will not build a clone of one. That is both a policy and a practical limit — voices that sound like a famous character are the fastest route to a takedown, and studios are actively watching for them.
It also will not invent comic timing you did not write. The renderer performs the line you gave it at the pace you asked for. If the joke does not land on the page, hearing it out loud will tell you so clearly, which is arguably the most useful thing a tool like this does.
Every voice you'll ever need
Script to audio in a few steps
- Write the scene as a conversation
Cartoon comedy is reaction-driven, so write the reactions as their own lines rather than as stage directions. A separate two-word line gets its own performance; a parenthetical does not.
- Cast for contrast, not for accuracy
Pick voices that sit far apart in pitch and pace. If two characters trade a lot of lines, make sure a listener can tell them apart with their eyes closed — that is the only test that matters in audio.
- Audition on the funniest line
Audition every candidate on the same punchline rather than on a neutral sentence. A voice that sounds great reading exposition can flatten a joke completely.
- Tune pace and emotion
Comedy is timing. Slow the big villain down, speed the sidekick up, and set emotion per line so the panic beats read as panic instead of as volume.
- Export and cut to picture
Take the full mix for a quick share, or the per-character stems if you are animating to the audio and need to slide individual lines around.
Frequently asked questions
Can I get an extreme squeaky or monstrous voice?
Yes — the library includes voices built at both ends of the range, and you can push them further with pitch and pace. What you cannot do is take a neutral adult voice and pitch-shift it three octaves without it sounding processed. Start from a voice that is already close to the target.
Do cartoon voices work for children's content?
They do, and it is one of the most common uses. Keep the pace slower than you think you need for young listeners, and avoid stacking three high-pitched voices in a row — it gets tiring fast on small speakers.
Can two characters talk over each other?
Not inside a single render. Overlapping dialogue is a mixing decision, so export the stems and overlap them in your editor. Stem export is on the Studio plan.
How do I keep a character consistent across episodes?
Save them as a character card: name, persona, voice and default emotion travel together. Open a new project, drop the card in, and episode four sounds like episode one.
Is there a limit on how long a scene can be?
Per-render limits are generous; the real constraint is your monthly minutes. Free gives five minutes, Creator sixty, Studio two hundred. A typical five-minute cartoon script consumes about five minutes, so plan by runtime rather than by word count.
Can I use this in a monetised YouTube video?
On any paid plan, yes — commercial use is included and there is no watermark. The free plan is personal use only and stamps a short audio watermark on exports.
What people build with these voices
Cast your first scene tonight
Paste a script, let CastDub assign a voice to every character, and export a finished drama.
Create for freeNo credit card. Free plan renews every month.