Does my child have a lisp? Find out in about a minute.
Record three short words and our AI listens for the ‘S’ sound — right in your browser. Free, and your child’s audio stays on your device.
Short answer: the most common lisp is a frontal lisp, where the tongue pushes forward on ‘S’ and gives it a soft ‘th’ quality (so “sun” sounds like “thun”). It’s common, developmentally normal in young children, and very responsive to daily practice. The free test below records your child saying sun, soup, and bus, runs the same on-device AI that powers our practice loop, and returns a likely-lisp verdict with three next steps. It’s a screening, not a diagnosis.
Does your child have a lisp?
Record 3 short words and our AI listens for the ‘S’ sound.
Free · ~1 minute · audio stays on your device
Your child’s audio stays on your device. The recordings are analyzed right here in your browser and then discarded — they are never uploaded to a server.
Lisp test FAQ
Does my child have a lisp?
Record your child saying three short S-words (sun, soup, bus). Our AI listens for how the ‘S’ sound is made and tells you whether a frontal or lateral lisp is likely, with a plain-English explanation. It's a screening, not a diagnosis — if you don't see change in a few weeks, see a speech-language pathologist.
What is a frontal lisp?
A frontal (interdental) lisp happens when the tongue pushes forward on the ‘S’ sound, giving it a soft ‘th’ quality (so ‘sun’ sounds like ‘thun’). It is very common in young children and usually responds well to daily practice.
Is the lisp test free and private?
Yes. The test is free and takes about a minute. All analysis runs in your browser on your device — the audio recordings are never uploaded to a server, and they are discarded after scoring.
At what age should an S lisp be corrected?
Many children produce a clear ‘S’ by around age 4–5. A frontal lisp is developmentally common before then. If a lisp persists past about age 4½, or you have concerns, a daily practice program and a check-in with a speech-language pathologist are good next steps.
Every sound. One step closer. SpeechStep screenings are a friendly first step — not a medical diagnosis. If a lisp persists, please see a speech-language pathologist.