{ "openapi": "3.0.1", "info": { "title": "Bulk Text to Speech ā€” MP3 + SRT Subtitles (No API Key)", "description": "Convert text to natural AI speech in bulk. 322 neural voices, 75+ languages, no API key. 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Add as many as you want ā€” they are all generated in parallel.\n\nāš” Unlock full pages and higher limits by subscribing to an [Apify plan](https://apify.com/pricing?fpr=youssef).\nšŸ’¼ Need a custom solution? Reach out at youssefarhan24@gmail.com\nšŸŒ Got a site in mind? [Suggest it here](https://automationbyexperts.com/apify)", "items": { "type": "string" } }, "voice": { "title": "Voice", "enum": [ "en-US-AriaNeural", "en-US-JennyNeural", "en-US-MichelleNeural", "en-US-AnaNeural", "en-US-GuyNeural", "en-US-ChristopherNeural", "en-US-EricNeural", "en-US-AvaMultilingualNeural", "en-US-EmmaMultilingualNeural", "en-US-AndrewMultilingualNeural", "en-US-BrianMultilingualNeural", "en-GB-SoniaNeural", "en-GB-RyanNeural", "en-AU-NatashaNeural", "en-IN-NeerjaNeural", "es-ES-ElviraNeural", "es-MX-DaliaNeural", "es-MX-JorgeNeural", "fr-FR-DeniseNeural", "fr-FR-HenriNeural", "de-DE-KatjaNeural", "de-DE-ConradNeural", "it-IT-ElsaNeural", "it-IT-DiegoNeural", "pt-BR-FranciscaNeural", "pt-BR-AntonioNeural", "ar-SA-ZariyahNeural", "ar-EG-SalmaNeural", "hi-IN-SwaraNeural", "ja-JP-NanamiNeural", "ko-KR-SunHiNeural", "zh-CN-XiaoxiaoNeural", "zh-CN-YunxiNeural", "ru-RU-SvetlanaNeural", "tr-TR-EmelNeural", "nl-NL-ColetteNeural", "pl-PL-ZofiaNeural", "sv-SE-SofieNeural", "id-ID-GadisNeural", "vi-VN-HoaiMyNeural", "th-TH-PremwadeeNeural" ], "type": "string", "description": "Neural voice used for all texts. 322 voices in 75+ languages are available ā€” this list shows the most popular ones. Need another? Use the 'Custom voice code' field below, or tick 'List all voices' to export the full catalog.", "default": "en-US-AriaNeural" }, "speed": { "title": "Speaking speed", "enum": [ "-50%", "-25%", "-10%", "+0%", "+10%", "+25%", "+50%", "+100%" ], "type": "string", "description": "How fast the voice talks. TikTok/Shorts creators often use +25%.", "default": "+0%" }, "pitch": { "title": "Pitch", "enum": [ "-20Hz", "-10Hz", "+0Hz", "+10Hz", "+20Hz" ], "type": "string", "description": "Voice pitch adjustment.", "default": "+0Hz" }, "customVoice": { "title": "Custom voice code (optional)", "type": "string", "description": "Any of the 322 supported voice codes, e.g. `el-GR-AthinaNeural`. Overrides the Voice dropdown. Tick 'List all voices' below and run once to export the full catalog." }, "generateSubtitles": { "title": "Generate subtitles", "type": "boolean", "description": "Create a perfectly timed subtitle file (SRT or VTT) next to every MP3 ā€” ready to drop into CapCut, Premiere, DaVinci or YouTube.", "default": true }, "subtitleGranularity": { "title": "Subtitle timing", "enum": [ "sentence", "word" ], "type": "string", "description": "'Word-by-word' gives you one cue per word ā€” perfect for animated TikTok-style captions. 'Sentence' gives classic subtitle blocks.", "default": "sentence" }, "subtitleFormat": { "title": "Subtitle format", "enum": [ "srt", "vtt" ], "type": "string", "description": "SRT works everywhere (CapCut, Premiere, YouTube). VTT is for web players.", "default": "srt" }, "combineAudio": { "title": "Also merge everything into one file", "type": "boolean", "description": "Additionally joins all clips into a single `combined.mp3` (and one continuous subtitle file) in the original order ā€” handy for full videos, podcasts or audiobooks.", "default": false }, "maxConcurrency": { "title": "Parallel conversions", "minimum": 1, "maximum": 20, "type": "integer", "description": "How many texts are converted at the same time. 5 is a safe default; raise it for large batches.", "default": 5 }, "listVoices": { "title": "List all voices (no audio)", "type": "boolean", "description": "Run once with this ON to export the full catalog of 322 voices (name, language, gender, personality) to the dataset ā€” then pick your favorite and put its code into 'Custom voice code'. 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