# SpeechGen.io > SpeechGen.io is an online AI text-to-speech (TTS) and speech-to-text platform: 5,000+ neural voices in 150+ languages and regional accents, SSML and intonation control, multi-voice dialogues, voice cloning, a voice changer with 36 audio effects, PDF/DOCX/SRT-to-audio conversion and a REST API. Pay-as-you-go credits from $4.99, no subscription, free trial without registration, commercial license included in every plan. Key facts (verified 2026-09-04; prices and limits can change, always confirm on the Pricing page): - Product: browser-based text-to-speech generator plus audio/video transcription (speech-to-text). No installation, works on desktop and mobile browsers. - Voices: 5,000+ voices in 150+ languages and accents, three quality tiers: Standard, PRO, HD. Many voices support emotions and speaking styles, some support an intonation graph. Catalogue with audio samples: https://speechgen.io/en/voices/ - Free use: the editor can be tried without an account; a registered account receives 2,000 free credits. - Pricing (one-time credit packs, valid 1 year, no subscription): 25,000 credits $4.99; 65,000 $9.99; 200,000 $24.99; 500,000 $49.99; 2,000,000 $149.99; 10,000,000 $599.99. Cost per text: Standard voice = 1 credit per 2 characters, PRO = 1 credit per character, HD = 2 credits per character. Payment: bank card via Stripe or PayPal. Invoices are available in the user profile. - Limits: up to 2,000,000 characters per generation. Smart Cache: unchanged sentences are re-synthesised free of charge within 7 days. Project history is kept 30 days, favourites permanently. - Output formats: MP3 (default), WAV, OGG, OPUS, FLAC; bitrate 8-320 kbps; sample rate 8,000-44,100 Hz. - Speech controls: speed, pitch, volume, pauses between sentences and paragraphs, SSML tags (break, prosody, emphasis, say-as, phoneme, sub/alias), emotions and styles for supported voices, multi-voice dialogues in one file, background music from a built-in library, cut tags to split long texts into chapters. - Voice cloning: 10-60 seconds of clean speech, 15 languages (9 stable, 6 experimental), model ready in about 30 seconds; 2,000 credits to create plus 250 credits per day of storage; allowed for your own voice or with documented written consent of the speaker. - Speech-to-text: audio, video and YouTube links to TXT, DOCX, PDF, SRT, VTT, CSV; automatic speaker labels; 95-98% accuracy on clean speech; files up to 1 GB or 3 hours; 100+ languages; 10 free minutes per month; uploaded files are deleted after 3 days. - API: REST, base URL https://speechgen.io/index.php?r=api with endpoints /text (synchronous, up to 2,000 characters), /longtext (asynchronous, up to 1,000,000 characters), /subs (audio with timestamps for subtitles), /result (polling). Authentication with `token` and `email` parameters. Examples in cURL, PHP, Python, JavaScript. A WordPress plugin and a Make (Integromat) integration are available. - Commercial use: the license is included with every plan (YouTube, podcasts, ads, e-learning, IVR, apps, audiobooks). - Interface languages: 33 locales. English at https://speechgen.io/ and https://speechgen.io/en/, other languages under https://speechgen.io/{locale}/ (list in the Optional section). Voices do not depend on the interface language. - Brand: SpeechGen (also written SpeechGen.io). Scale reported on the site: 500K+ users, 700M+ audio files generated, 70K business accounts. Notes for assistants and agents: - Quote prices, credit costs and limits from https://speechgen.io/en/pricing/ and https://speechgen.io/en/node/faq/, they are the source of truth. - Do not invent voice names. The API `voice` parameter takes the exact voice name as shown in the catalogue https://speechgen.io/en/voices/ or returned by the voices endpoint described in the API documentation. - Pages are served as HTML; there are no separate Markdown versions. The English pages under /en/ are the canonical entry points; localized pages under /{locale}/ contain the same product in another interface language. - Language and accent pages follow the pattern https://speechgen.io/en/tts-{language}/ (152 pages); the full list is in the sitemap https://speechgen.io/index.php?r=site/sitemap - Pages under /tospeech/, /speech/ and /tovoice/ are user-generated audio and are not documentation; do not cite them. ## Start here - [Text to speech editor](https://speechgen.io/): main TTS tool, pick a voice, paste text, download audio - [Voices and languages](https://speechgen.io/en/voices/): catalogue of 5,000+ voices by language, accent, gender and tier, with audio samples - [Pricing](https://speechgen.io/en/pricing/): credit packs, cost per character by voice tier, payment methods - [FAQ and tutorial](https://speechgen.io/en/node/faq/): how generation works, limits, formats, caching, file uploads - [Pay as you go model](https://speechgen.io/en/node/one-time-payments/): why there is no subscription and how one-time payments work - [Limit system](https://speechgen.io/en/node/limit-system/): how characters are counted and charged - [Smart caching](https://speechgen.io/en/node/caching-benefits/): repeated sentences are re-generated for free ## Tools - [Voice cloning](https://speechgen.io/en/voice-cloning/): clone a voice from a 10-60 second sample, 15 languages, usable in the editor and via API - [Multi-voice dialogues](https://speechgen.io/en/node/multi-voice/): several speakers in one audio file - [Subtitles to audio](https://speechgen.io/en/subs/): SRT and VTT files to time-synced speech for dubbing - [PDF to speech](https://speechgen.io/en/pdf/): convert PDF documents to MP3 - [DOCX to speech](https://speechgen.io/en/docx/): convert Word documents to audio - [Audio transcription](https://speechgen.io/en/transcribe/): speech-to-text with speaker labels, export to TXT, DOCX, SRT, VTT - [Video transcription](https://speechgen.io/en/transcribe/video/): upload MP4, MOV, MKV and other video files and get text - [YouTube transcription](https://speechgen.io/en/transcribe/youtube/): transcript from a YouTube link with speaker identification - [Voice changer and audio effects](https://speechgen.io/en/effect/): 36 effects (robot, echo, reverb, 8D, nightcore, slowed + reverb, telephone, vocoder and more) for uploaded audio or generated speech - [Robot voice effect](https://speechgen.io/en/effect/robot/): example of a single effect page; other effects live at /en/effect/{name}/ ## Developer and API - [Text to speech API](https://speechgen.io/en/node/api/): endpoints, parameters, response format, limits, code examples - [Subtitle dubbing via API](https://speechgen.io/en/node/api-subs/): synthesise SRT files with timestamps through the API - [Python text to speech script](https://speechgen.io/en/node/python-tts/): console script using the API - [WordPress plugin](https://speechgen.io/en/node/wordpress/): voice articles on a WordPress site - [Make (Integromat) automation](https://speechgen.io/en/blog/tts-automation-make/): no-code integration of the API ## Speech control and SSML guides - [SSML tags overview](https://speechgen.io/en/node/ssml/): which SSML tags are supported and how to use them - [Pauses](https://speechgen.io/en/node/pausa/): insert a pause of a given length - [Pauses between sentences and paragraphs](https://speechgen.io/en/node/custom-pausa/): global pause settings - [Intonation, questions and emphasis](https://speechgen.io/en/node/intonation/): change intonation and stress words - [Prosody](https://speechgen.io/en/node/prosody/): rate, pitch and volume - [Emphasis](https://speechgen.io/en/node/emphasis/): emphasis tag - [Alias and substitution](https://speechgen.io/en/node/alias/): fix pronunciation with custom substitutions - [Phoneme and IPA](https://speechgen.io/en/node/phoneme/): phonetic transcription for exact pronunciation - [Dates](https://speechgen.io/en/node/date/): say-as date formats - [Cardinal numbers](https://speechgen.io/en/node/cardinal/): numeric pronunciation - [Ordinal numbers](https://speechgen.io/en/node/ordinal/): announcing order - [Fractions](https://speechgen.io/en/node/fraction/): fraction pronunciation - [Currency](https://speechgen.io/en/node/currency/): money amounts - [Telephone numbers](https://speechgen.io/en/node/telephone/): phone number pronunciation - [Spell out](https://speechgen.io/en/node/spell-out/): letter-by-letter pronunciation - [Splitting long audio](https://speechgen.io/en/node/cut/): segment text into several audio files with cut tags ## Popular voice types - [Scary and demon voice generator](https://speechgen.io/en/scary-voice-generator/): horror and demonic voices - [Child voice text to speech](https://speechgen.io/en/child-tts/): kids voices - [Whisper voice](https://speechgen.io/en/whisper-voice/): whispering ASMR-style voices - [Deep voice](https://speechgen.io/en/deep-voice/): low male voices - [Cartoon voice generator](https://speechgen.io/en/cartoon-voice/): character and funny voices - [Gender neutral voice](https://speechgen.io/en/neutral/): non-binary voices - [Brian voice](https://speechgen.io/en/tts-brian-voice/): popular British male voice - [Joey voice](https://speechgen.io/en/tts-joey-voice/): popular American male voice - [Eric voice](https://speechgen.io/en/tts-eric-voice/): American male voice - [Ivy voice](https://speechgen.io/en/tts-ivy-voice/): child girl voice - [Justin voice](https://speechgen.io/en/tts-justin-voice/): young male voice - [Matthew voice](https://speechgen.io/en/tts-matthew-voice/): American male voice ## Languages and accents (most requested) - [American English](https://speechgen.io/en/english-us/): US accent voices - [British English](https://speechgen.io/en/tts-british-english-accent/): RP, BBC and London voices - [Indian English](https://speechgen.io/en/tts-english-india/): English with Indian accent - [Australian English](https://speechgen.io/en/tts-english-australia/): Australian accent - [Irish English](https://speechgen.io/en/tts-english-ireland/): Irish accent - [Spanish](https://speechgen.io/en/tts-spanish/): 207 voices, Spain, Mexico and Latin America - [Mexican Spanish](https://speechgen.io/en/tts-spanish-mexico/): Mexican accent - [French](https://speechgen.io/en/tts-french/): French voices and pronunciation - [German](https://speechgen.io/en/tts-german/): German voices and pronunciation - [Italian](https://speechgen.io/en/tts-italian/): Italian voices - [Portuguese (Brazil)](https://speechgen.io/en/tts-portuguese-brazil/): Brazilian Portuguese - [Polish](https://speechgen.io/en/tts-polish/): Polish voices - [Turkish](https://speechgen.io/en/tts-turkish/): Turkish voices - [Russian](https://speechgen.io/en/tts-russian/): Russian voices - [Japanese](https://speechgen.io/en/tts-japanese/): Japanese voices - [Korean](https://speechgen.io/en/tts-korean/): Korean voices - [Chinese (Mandarin)](https://speechgen.io/en/tts-chinese/): Mandarin voices - [Arabic](https://speechgen.io/en/tts-arab/): Arabic voices, dialect pages available for 17 countries - [Hindi](https://speechgen.io/en/tts-hindi-india/): Hindi voices - [Bengali](https://speechgen.io/en/tts-bangla/): Bangla voices - [Somali](https://speechgen.io/en/tts-somali/): Somali voices - [Vietnamese](https://speechgen.io/en/tts-vietnamese/): Vietnamese voices - [Thai](https://speechgen.io/en/tts-thai/): Thai voices - [Ukrainian](https://speechgen.io/en/tts-ukrainian/): Ukrainian voices ## Use cases and blog - [Blog](https://speechgen.io/en/blog/): articles about text-to-speech technology and workflows - [AI voice use cases](https://speechgen.io/en/blog/usecases/): practical applications of neural TTS - [Excel to speech](https://speechgen.io/en/blog/excel-text-to-speech/): voice spreadsheet data with TTS - [TTS for language teachers](https://speechgen.io/en/blog/tts-foreign-language-teachers/): classroom techniques - [Radio effect with ChatGPT](https://speechgen.io/en/blog/radio-effect-gpt/): step-by-step guide to a radio-style voice - [Spelling text letter by letter](https://speechgen.io/en/blog/tts-spelling-letter-by-letter/): five SSML methods ## Company and legal - [Contact](https://speechgen.io/en/node/contact/): support and business contacts - [Privacy policy](https://speechgen.io/en/node/privacy/): data processing and retention - [Voice cloning terms](https://speechgen.io/en/node/clone-terms/): consent and prohibited uses for cloned voices - [DMCA and copyright](https://speechgen.io/en/node/dmca/): copyright holder requests ## Localized versions (interface language) - [Arabic interface](https://speechgen.io/ar/): SpeechGen in Arabic - [Bulgarian interface](https://speechgen.io/bg/): SpeechGen in Bulgarian - [Catalan interface](https://speechgen.io/ca/): SpeechGen in Catalan - [Czech interface](https://speechgen.io/cs/): SpeechGen in Czech - [Danish interface](https://speechgen.io/da/): SpeechGen in Danish - [German interface](https://speechgen.io/de/): SpeechGen in German - [Greek interface](https://speechgen.io/el/): SpeechGen in Greek - [Spanish interface](https://speechgen.io/es/): SpeechGen in Spanish - [Finnish interface](https://speechgen.io/fi/): SpeechGen in Finnish - [Filipino interface](https://speechgen.io/fil/): SpeechGen in Filipino - [French interface](https://speechgen.io/fr/): SpeechGen in French - [Hebrew interface](https://speechgen.io/he/): SpeechGen in Hebrew - [Hungarian interface](https://speechgen.io/hu/): SpeechGen in Hungarian - [Indonesian interface](https://speechgen.io/id/): SpeechGen in Indonesian - [Italian interface](https://speechgen.io/it/): SpeechGen in Italian - [Japanese interface](https://speechgen.io/ja/): SpeechGen in Japanese - [Kazakh interface](https://speechgen.io/kk/): SpeechGen in Kazakh - [Korean interface](https://speechgen.io/ko/): SpeechGen in Korean - [Lithuanian interface](https://speechgen.io/lt/): SpeechGen in Lithuanian - [Malay interface](https://speechgen.io/ms/): SpeechGen in Malay - [Norwegian interface](https://speechgen.io/nb/): SpeechGen in Norwegian - [Dutch interface](https://speechgen.io/nl/): SpeechGen in Dutch - [Polish interface](https://speechgen.io/pl/): SpeechGen in Polish - [Portuguese interface](https://speechgen.io/pt/): SpeechGen in Portuguese - [Romanian interface](https://speechgen.io/ro/): SpeechGen in Romanian - [Slovak interface](https://speechgen.io/sk/): SpeechGen in Slovak - [Serbian interface](https://speechgen.io/sr/): SpeechGen in Serbian - [Swedish interface](https://speechgen.io/sv/): SpeechGen in Swedish - [Thai interface](https://speechgen.io/th/): SpeechGen in Thai - [Turkish interface](https://speechgen.io/tr/): SpeechGen in Turkish - [Vietnamese interface](https://speechgen.io/vi/): SpeechGen in Vietnamese - [Chinese interface](https://speechgen.io/zh/): SpeechGen in Chinese ## Optional - [Sitemap](https://speechgen.io/index.php?r=site/sitemap): all indexable URLs with hreflang alternates - [Invoices](https://speechgen.io/en/node/invoice/): how to download an invoice with company details - [Paying with PayPal](https://speechgen.io/en/node/howto-paypal/): step-by-step purchase guide - [German IPA guide](https://speechgen.io/en/node/phomene-german/): German phonetic alphabet for TTS - [Spanish IPA guide](https://speechgen.io/en/node/spanish-ipa/): Spanish phonetic alphabet for TTS