SpeechGen
Online AI text-to-speech generator with 5,000+ voices in 150 languages, supporting MP3, WAV, and FLAC output.
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What is SpeechGen?
SpeechGen is an online AI voice generator and text-to-speech converter that transforms written text into realistic speech using advanced neural synthesis infrastructure. The tool offers over 5,000 realistic voices across 150+ languages and regional accents, allowing users to convert anything from a single sentence to an entire book (up to 2 million characters per generation). Users can paste text directly, upload DOCX/PDF files, or upload subtitle files (SRT/VTT) for synced audio generation. The platform downloads audio in multiple formats including MP3, WAV, FLAC, OGG, and OPUS with configurable bitrates from 8 kbps (telephony) to 320 kbps (studio quality).
SpeechGen pricing
Pricing model: Freemium
$0 to start with 1,000 characters free, no account or credit card required. Register for free to get +2,000 characters (3,000/day total) that renew daily for 7 days. Pay-as-you-go packs: 25K Limits Pack at $4.99 (25,000 chars for Pro Voices or 50,000 for Standard), 65K Limits Pack at $9.99 (65,000 Pro/130,000 Standard), 200K Limits Pack at $24.99 (200,000 Pro/400,000 Standard), 500K Limits Pack at $49.99 (500,000 Pro/1,000,000 Standard). No subscription required. Credits expire 365 days from purchase. All packs include commercial license, API access, all voices, smart caching, and 30-day history. Quality tiers: Standard at 0.5 per char, Pro at 1 per char, HD at 2 per char.
SpeechGen pros
- 5,000+ realistic voices across 150+ languages
- Pay-as-you-go pricing with no monthly subscriptions
- 1,000 characters free instantly without sign-up
- No watermarks on free tier or paid plans
- Smart Cache regenerates identical text at zero cost
- Up to 2 million characters per generation
- Multi-voice dialog mode with unlimited speakers
- Built-in AI background music library included
- <cut> tag for automatic chapter-by-chapter splitting
- SSML tags for precise pause and pitch control
- Commercial license included with every plan
- REST API access for workflow integration
- Multiple audio formats: MP3, WAV, FLAC, OGG, OPUS
- Bitrate options from 8 kbps to 320 kbps
- 365-day credit expiration from purchase
- 30-day history retention for all projects
- Upload PDF, DOCX, SRT, and VTT files directly
- Audio-to-text and video-to-text transcription built-in
- Preview any voice before spending characters
- Three quality tiers: Standard, Pro, and HD
SpeechGen cons
- No monthly subscription option for heavy users
- Pro and HD voices cost more per character
- Interface may feel dense for first-time users
- No mobile app available
- Free tier limited to 1,000 characters without account
- Registered free users get 3,000/day for only 7 days
- SSML tags require learning for advanced control
- Background music library may have limited selection
Frequently asked questions about SpeechGen
What is the maximum text length per generation?
Up to 2 million characters per generation. You can paste entire books, long scripts, or documentation — SpeechGen handles it. For very long texts, the system automatically splits them into manageable segments.
What audio formats can I download?
MP3, WAV, FLAC, OGG, or OPUS. Choose bitrates from 8 kHz (telephony) to 320 kbps (studio). WAV gives you uncompressed audio for post-production in Premiere, DaVinci, or any DAW.
Can I use multiple voices in one file?
Yes. Use Dialog mode — add speakers, highlight each person's lines, and SpeechGen merges all voices into a single file. Great for conversations, interviews, audiobooks with characters, and explainer videos.
Can I use the audio commercially?
Yes. A commercial license is included with every plan — free and paid. You own the audio files you create and can use them in YouTube videos, ads, apps, e-learning courses, and any other project.
How does Smart Cache work?
SpeechGen tracks your last synthesis — when you fix a typo, proof out loud, or tweak a word, you can regenerate identical content and nothing gets deducted. Only changed lines re-generate and cost characters.
Can I use SpeechGen for YouTube, TikTok, or Reels?
Yes — generate a voiceover, download MP3 or WAV, and drop it into any editor: Premiere Pro, DaVinci Resolve, CapCut, Final Cut Pro, iMovie, or Camtasia. Commercial license included, no watermarks. For animation, use Dialog mode to assign different voices to characters.
How does AI text to speech work?
Neural networks trained on real human voice recordings learn pronunciation, intonation, and rhythm — then generate new speech from any text. SpeechGen offers Standard, Pro, and HD tiers depending on the underlying neural model.
Can I upload subtitle files for synced audio?
Yes. Upload SRT or VTT files — each line is voiced at its exact timecode. Drop the audio straight into your video editor, already synced. Every subtitle line voiced to the exact millisecond.
When do credits expire?
Credits expire 365 days from purchase, unlike typical TTS services where unused credits are lost monthly. Buy only what you need and use them at your own pace with no monthly fees.