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voiceChecker.js

Checks if voices of specified langauge are available in the browser's speech synthesis interface (WebSpeech API).

  • Takes a 2 character ISO 639-1 language code as input
  • Returns true if at least one voice is available for the specified langauge
  • Returns false if 0 voices are available for the specified lanaguge or if WebSpeech API is not supported by the browser.



Usage instructions

Load from file

Download voiceChecker.js from https://www.vivek.nexus/check-webspeech-voice-availability/voiceChecker.js

Vanilla JS

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Voice Checker</title>
</head>

<body>
    <h1>Voice Checker</h1>
    <p>Open the console to see the results.</p>
    <script type="module">
        import { isAtLeastOneVoiceAvailable } from "./voiceChecker.js"
        async function testVoiceChecker() {
            try {
                const languageCode = 'en'; // Example language code
                const isSupported = await isAtLeastOneVoiceAvailable(languageCode);
                console.log(`Voices available for language '${languageCode}':`, isSupported);
            } catch (error) {
                console.error('Voice availability', error);
            }
        }

        // Test the function
        testVoiceChecker();
    </script>
</body>

</html>

React

// Client side component

import { useEffect } from 'react';
import { isAtLeastOneVoiceAvailable } from './voiceChecker'; // Adjust the path as per your file structure

function VoiceCheckerComponent() {
    useEffect(() => {
        // React runs effect twice when a component mounts, which causes issues with WebSpeech API events in the voiceChecker module. See https://react.dev/reference/react/useEffect#my-effect-runs-twice-when-the-component-mounts
        // You can use a timeout as a workaround during development
        // In production, effects will run only once, so timeout is not needed
        const timeout = setTimeout(() => {
            isAtLeastOneVoiceAvailable("en").then((isSupported) => {
                console.log(isSupported)
            }).catch((isSupported) => {
                console.log(isSupported)
            })
        }, 100)

        return (() => clearTimeout(timeout))
    }, [])

    return (
        <div>
            <h1>Voice Checker</h1>
            <p>Check console for results.</p>
        </div>
    );
}

export default VoiceCheckerComponent;


Load from URL

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Voice Checker</title>
    <script type="module">
        import { isAtLeastOneVoiceAvailable } from 'https://www.vivek.nexus/check-webspeech-voice-availability/voiceChecker.js';

        async function testVoiceChecker() {
            try {
                const languageCode = 'en'; // Example language code
                const isSupported = await isAtLeastOneVoiceAvailable(languageCode);
                console.log(`Voices available for language '${languageCode}':`, isSupported);
            } catch (error) {
                console.error('Voice availability:', error);
            }
        }

        // Test the function
        testVoiceChecker();
    </script>
</head>
<body>
    <h1>Voice Checker</h1>
    <p>Open the console to see the results.</p>
</body>
</html>



Indicative voice availability of different languages

Indicative availability of various voices in WebSpeech API in different operating systems (2024). Actual availability can be widely different based on the geographical location of the device.

Voices with greater than 90% availability: German, English (GB), English (US), Spanish, French, Italian, Russian

Language code Langauge name Voice language Android availability Chromium OS availability iOS availability Linux availability Mac OS availability Windows availability Total availability
af Afrikaans af-ZA 0.06% 5.50% 0.15%
am Amharic am-ET 0.06% 5.50% 0.15%
ar Arabic ar 0.08% 100.00% 2.82% 0.09%
ar Arabic ar-001 0.10% 90.52% 70.42% 13.49%
ar Arabic ar-AE 0.25% 5.05% 0.30%
ar Arabic ar-BH 0.06% 5.05% 0.15%
ar Arabic ar-DZ 0.06% 5.05% 0.15%
ar Arabic ar-EG 0.06% 6.42% 0.17%
ar Arabic ar-IQ 0.06% 5.05% 0.15%
ar Arabic ar-JO 0.06% 5.05% 0.15%
ar Arabic ar-KW 0.06% 5.05% 0.15%
ar Arabic ar-LB 0.06% 5.05% 0.15%
ar Arabic ar-LY 0.06% 5.05% 0.15%
ar Arabic ar-MA 0.06% 5.05% 0.15%
ar Arabic ar-OM 0.06% 5.05% 0.15%
ar Arabic ar-QA 0.06% 5.05% 0.15%
ar Arabic ar-SA 0.06% 9.24% 25.35% 6.42% 1.65%
ar Arabic ar-SY 0.06% 5.05% 0.15%
ar Arabic ar-TN 0.06% 5.05% 0.15%
ar Arabic ar-YE 0.06% 5.05% 0.15%
as Assamese as-IN 38.10% 13.95% 31.67%
az Azerbaijani az-AZ 5.05% 0.09%
bg Bulgarian bg 100.00% 0.01%
bg Bulgarian bg-BG 52.66% 100.00% 90.52% 20.93% 70.42% 6.42% 57.24%
bn Bengali bn 100.00% 0.01%
bn Bengali bn-BD 53.77% 100.00% 20.93% 5.50% 44.82%
bn Bengali bn-IN 53.74% 100.00% 20.93% 5.50% 44.79%
br Breton brx-IN 38.10% 13.95% 31.67%
bs Bosnian bs-BA 0.08% 5.05% 0.16%
bs Bosnian bs 100.00% 0.01%
bs Bosnian bs-BA-#Cyrl 51.26% 20.93% 42.62%
bs Bosnian bs-BA-#Latn 51.26% 20.93% 42.62%
ca Catalan, Valencian ca 0.01% 100.00% 0.02%
ca Catalan, Valencian ca-ES 49.48% 90.52% 16.28% 70.42% 6.42% 54.59%
cm Unknown cmn 100.00% 0.01%
cs Czech cs 100.00% 0.01%
cs Czech cs-CZ 53.74% 100.00% 99.76% 20.93% 98.59% 6.42% 59.62%
cy Welsh cy 0.01% 100.00% 0.02%
cy Welsh cy-GB 49.47% 16.28% 6.42% 41.24%
da Danish da 100.00% 0.01%
da Danish da-DK 53.77% 100.00% 99.76% 20.93% 98.59% 6.42% 59.65%
de German de-AT 0.06% 7.34% 0.19%
de German de-CH 0.06% 6.42% 0.17%
de German de 100.00% 0.01%
de German de-DE 94.07% 100.00% 100.00% 93.02% 98.59% 85.78% 94.70%
do Unknown doi-IN 23.23% 9.30% 19.32%
el Greek, Modern (1453–) el 100.00% 0.01%
el Greek, Modern (1453–) el-GR 53.74% 100.00% 99.76% 20.93% 98.59% 6.42% 59.62%
en English en-CA 0.06% 9.17% 0.22%
en English en-HK 0.06% 5.05% 0.15%
en English en-IE 0.06% 99.76% 98.59% 6.42% 15.07%
en English en-KE 0.06% 5.05% 0.15%
en English en-NZ 0.06% 5.05% 0.15%
en English en-PH 0.06% 6.42% 0.17%
en English en-SG 0.06% 5.05% 0.15%
en English en-TZ 0.06% 5.05% 0.15%
en English en-ZA 0.06% 99.76% 95.77% 6.42% 15.05%
en English en-AU 53.76% 100.00% 99.76% 20.93% 98.59% 9.63% 59.70%
en English en-GB 94.34% 100.00% 100.00% 93.02% 98.59% 86.70% 94.94%
en English en-IN 54.19% 100.00% 98.69% 20.93% 95.77% 8.72% 59.87%
en English en-NG 53.56% 100.00% 20.93% 5.50% 44.64%
en English en-scotland 12.68% 0.08%
en English en-US 98.10% 100.00% 100.00% 95.35% 98.59% 98.17% 98.26%
es Spanish, Castilian es-419 0.06% 2.82% 0.07%
es Spanish, Castilian es-AR 0.06% 12.68% 6.42% 0.25%
es Spanish, Castilian es-BO 0.06% 5.05% 0.15%
es Spanish, Castilian es-CL 0.06% 5.05% 0.15%
es Spanish, Castilian es-CO 0.06% 6.42% 0.17%
es Spanish, Castilian es-CR 0.06% 5.05% 0.15%
es Spanish, Castilian es-CU 0.06% 5.05% 0.15%
es Spanish, Castilian es-DO 0.06% 5.05% 0.15%
es Spanish, Castilian es-EC 0.06% 5.05% 0.15%
es Spanish, Castilian es-GQ 0.06% 5.05% 0.15%
es Spanish, Castilian es-GT 0.06% 5.05% 0.15%
es Spanish, Castilian es-HN 0.06% 5.05% 0.15%
es Spanish, Castilian es-NI 0.06% 5.05% 0.15%
es Spanish, Castilian es-PA 0.06% 5.05% 0.15%
es Spanish, Castilian es-PE 0.06% 5.05% 0.15%
es Spanish, Castilian es-PR 0.06% 5.05% 0.15%
es Spanish, Castilian es-PY 0.06% 5.05% 0.15%
es Spanish, Castilian es-SV 0.06% 5.05% 0.15%
es Spanish, Castilian es-UY 0.06% 5.05% 0.15%
es Spanish, Castilian es-VE 0.06% 5.05% 0.15%
es Spanish, Castilian es 100.00% 0.01%
es Spanish, Castilian es-ES 94.03% 100.00% 100.00% 93.02% 98.59% 85.78% 94.67%
es Spanish, Castilian es-MX 15.55% 99.76% 32.56% 95.77% 8.72% 28.04%
es Spanish, Castilian es-US 55.31% 100.00% 0.24% 46.51% 15.49% 82.57% 47.73%
et Estonian et 100.00% 0.01%
et Estonian et-EE 53.62% 100.00% 20.93% 6.42% 44.71%
fa Persian fa-IR 0.06% 5.50% 0.15%
fa Persian fa 100.00% 0.01%
fi Finnish fi 100.00% 0.01%
fi Finnish fi-FI 53.70% 100.00% 99.76% 20.93% 98.59% 6.42% 59.59%
fi Finnish fil-PH 53.62% 100.00% 20.93% 5.50% 44.69%
fr French fr-BE 0.15% 6.42% 0.25%
fr French fr-CH 0.06% 6.42% 0.17%
fr French fr-CA 53.62% 100.00% 99.76% 20.93% 98.59% 8.72% 59.56%
fr French fr-FR 94.01% 100.00% 100.00% 93.02% 98.59% 85.78% 94.65%
ga Irish ga-IE 0.06% 6.42% 0.17%
gl Galician gl-ES 0.06% 5.50% 0.15%
gu Gujarati gu 100.00% 0.01%
gu Gujarati gu-IN 53.42% 100.00% 20.93% 6.42% 44.54%
he Hebrew he-IL 99.76% 98.59% 6.42% 15.02%
hi Hindi hi-IN 55.43% 100.00% 100.00% 46.51% 98.59% 83.94% 62.57%
hi Hindi hi-IN-#Latn 5.95% 4.65% 4.96%
hr Croatian hr 0.01% 100.00% 0.02%
hr Croatian hr-HR 49.68% 90.52% 16.28% 70.42% 6.42% 54.75%
hu Hungarian hu 100.00% 0.01%
hu Hungarian hu-HU 53.67% 100.00% 99.76% 20.93% 98.59% 6.42% 59.56%
id Indonesian id-ID 0.06% 100.00% 23.26% 97.18% 83.94% 16.61%
id Indonesian id 100.00% 2.82% 0.03%
in Unknown in-ID 53.85% 100.00% 20.93% 44.78%
is Icelandic is-IS 49.81% 16.28% 5.50% 41.51%
it Italian it 100.00% 0.01%
it Italian it-IT 93.99% 100.00% 100.00% 93.02% 98.59% 95.41% 94.80%
iw Unknown iw-IL 50.35% 16.28% 41.85%
ja Japanese ja-JP 53.82% 100.00% 100.00% 46.51% 98.59% 85.78% 61.27%
jv Javanese jv-ID 50.91% 100.00% 18.60% 5.50% 42.43%
jv Javanese jv-ID-#Latn 3.24% 2.33% 2.70%
ka Georgian ka-GE 0.06% 5.05% 0.15%
kk Kazakh kk-KZ 0.06% 5.50% 0.15%
km Central Khmer km-KH 53.63% 100.00% 20.93% 5.50% 44.70%
kn Kannada kn 100.00% 0.01%
kn Kannada kn-IN 53.42% 100.00% 20.93% 5.50% 44.53%
ko Korean ko 100.00% 0.01%
ko Korean ko-KR 53.87% 100.00% 100.00% 44.19% 98.59% 85.78% 61.30%
ko Korean kok-IN 38.04% 13.95% 31.62%
ks Kashmiri ks-IN 15.12% 4.65% 12.56%
ks Kashmiri ks-IN-#Arab 22.99% 9.30% 19.12%
ks Kashmiri ks-IN-#Deva 4.06% 2.33% 3.38%
ku Kurdish ku 100.00% 0.01%
la Latin la 100.00% 0.01%
lo Lao lo-LA 0.06% 5.50% 0.15%
lt Lithuanian lt 100.00% 0.01%
lt Lithuanian lt-LT 49.81% 16.28% 6.42% 41.52%
lv Latvian lv 100.00% 0.01%
lv Latvian lv-LV 52.55% 100.00% 20.93% 6.42% 43.82%
ma Unknown mai-IN 27.85% 11.63% 23.16%
ma Unknown mai-IN-#Deva 6.50% 4.65% 5.41%
mk Macedonian mk-MK 0.06% 5.50% 0.15%
ml Malayalam ml 100.00% 0.01%
ml Malayalam ml-IN 53.41% 100.00% 20.93% 5.50% 44.52%
mn Mongolian mn-MN 0.06% 5.05% 0.15%
mn Mongolian mni-IN-#Beng 22.99% 9.30% 19.12%
mr Marathi mr 100.00% 0.01%
mr Marathi mr-IN 53.41% 100.00% 20.93% 6.42% 44.54%
ms Malay ms 100.00% 0.01%
ms Malay ms-MY 52.67% 100.00% 90.52% 20.93% 70.42% 6.42% 57.25%
mt Maltese mt-MT 0.06% 6.42% 0.17%
my Burmese my-MM 0.06% 5.50% 0.15%
nb Norwegian Bokmål nb 100.00% 0.01%
nb Norwegian Bokmål nb-NO 53.66% 100.00% 90.52% 20.93% 85.92% 6.42% 58.17%
ne Nepali ne-NP 53.62% 100.00% 20.93% 5.05% 44.68%
nl Dutch, Flemish nl-BE 52.54% 100.00% 99.64% 20.93% 98.59% 6.42% 58.61%
nl Dutch, Flemish nl-NL 53.71% 100.00% 100.00% 44.19% 98.59% 85.78% 61.17%
no Norwegian no-NO 9.24% 12.68% 1.40%
or Oriya or-IN 38.04% 13.95% 31.62%
pa Punjabi, Panjabi pa-IN 0.08% 100.00% 0.08%
pa Punjabi, Panjabi pa-IN-#Guru 52.45% 20.93% 43.61%
pl Polish pl 100.00% 0.01%
pl Polish pl-PL 55.40% 100.00% 100.00% 46.51% 98.59% 85.78% 62.58%
ps Pashto, Pushto ps-AF 0.06% 5.50% 0.15%
pt Portuguese pt-BR 68.95% 100.00% 100.00% 76.74% 98.59% 85.78% 73.91%
pt Portuguese pt-PT 53.63% 100.00% 99.76% 20.93% 98.59% 6.42% 59.53%
ro Romanian, Moldavian, Moldovan ro 100.00% 0.01%
ro Romanian, Moldavian, Moldovan ro-RO 53.58% 100.00% 99.76% 20.93% 98.59% 6.42% 59.49%
ru Russian ru 100.00% 0.01%
ru Russian ru-RU 94.17% 100.00% 100.00% 93.02% 98.59% 86.24% 94.80%
sa Sanskrit sa-IN 23.23% 9.30% 19.32%
sa Sanskrit sat-IN-#Olck 22.99% 9.30% 19.12%
sd Sindhi sd-IN-#Deva 22.99% 9.30% 19.12%
si Sinhala, Sinhalese si-LK 53.60% 100.00% 20.93% 5.50% 44.67%
sk Slovak sk 100.00% 0.01%
sk Slovak sk-SK 53.57% 100.00% 99.76% 20.93% 98.59% 6.42% 59.48%
sl Slovenian sl-SI 0.06% 6.42% 0.17%
sl Slovenian sl 100.00% 0.01%
so Somali so-SO 0.06% 5.50% 0.15%
sq Albanian sq 100.00% 0.01%
sq Albanian sq-AL 51.22% 20.93% 5.05% 42.68%
sr Serbian sr 0.08% 100.00% 0.08%
sr Serbian sr-RS 5.50% 0.10%
su Sundanese su-ID 0.09% 100.00% 5.50% 0.19%
su Sundanese su-ID-#Latn 29.85% 9.30% 24.81%
sv Swedish sv 100.00% 0.01%
sv Swedish sv-SE 53.63% 100.00% 99.76% 20.93% 98.59% 6.42% 59.53%
sw Swahili sw-TZ 0.06% 5.05% 0.15%
sw Swahili sw 100.00% 0.01%
sw Swahili sw-KE 51.22% 20.93% 6.42% 42.70%
ta Tamil ta-LK 0.06% 5.05% 0.15%
ta Tamil ta-MY 0.06% 5.05% 0.15%
ta Tamil ta-SG 0.06% 5.05% 0.15%
ta Tamil ta 100.00% 0.01%
ta Tamil ta-IN 53.39% 100.00% 20.93% 6.42% 44.52%
te Telugu te 100.00% 0.01%
te Telugu te-IN 53.39% 100.00% 20.93% 6.42% 44.52%
th Thai th-TH 54.90% 100.00% 99.76% 23.26% 98.59% 6.42% 60.58%
tr Turkish tr 100.00% 0.01%
tr Turkish tr-TR 53.65% 100.00% 99.76% 20.93% 98.59% 8.72% 59.59%
uk Ukrainian uk-UA 53.60% 100.00% 90.52% 20.93% 70.42% 6.42% 58.02%
ur Urdu ur-IN 0.06% 5.05% 0.15%
ur Urdu ur-PK 53.39% 100.00% 20.93% 6.42% 44.52%
uz Uzbek uz-UZ 5.50% 0.10%
vi Vietnamese vi 100.00% 0.01%
vi Vietnamese vi-VN 55.62% 100.00% 90.52% 23.26% 70.42% 6.42% 59.70%
yu Unknown yue-HK 1.31% 100.00% 2.33% 1.10%
yu Unknown yue-HK-#Hant 51.79% 18.60% 43.06%
zh Chinese zh-CN 0.16% 100.00% 100.00% 23.26% 97.18% 85.78% 16.74%
zh Chinese zh-HK 0.06% 100.00% 23.26% 97.18% 85.78% 16.65%
zh Chinese zh-TW 0.14% 100.00% 100.00% 23.26% 97.18% 85.78% 16.72%
zh Chinese zh-CN-#Hans 54.02% 37.21% 44.97%
zh Chinese zh-CN-liaoning 5.05% 0.09%
zh Chinese zh-CN-shaanxi 5.05% 0.09%
zh Chinese zh-Hans 2.82% 0.02%
zh Chinese zh-Hant 2.82% 0.02%
zh Chinese zh-HK-#Hans 53.38% 37.21% 44.44%
zh Chinese zh-HK-#Hant 53.38% 37.21% 44.44%
zh Chinese zh-MO-#Hans 49.60% 16.28% 41.22%
zh Chinese zh-MO-#Hant 49.60% 16.28% 41.22%
zh Chinese zh-SG-#Hans 49.60% 16.28% 41.22%
zh Chinese zh-TW-#Hant 54.12% 37.21% 45.06%
zu Zulu zu-ZA 0.06% 5.50% 0.15%

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Checks if a voice of specified language is available on the device

www.vivek.nexus/check-webspeech-voice-availability/voiceChecker.js

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javascript text-to-speech voice webspeech-api lanaguage

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