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AI text to speech

Generate natural-sounding speech for videos using Synthesia's text-to-speech software. No need for microphones, voice actors, or audio recordings.

Try it out with the interactive text-to-speech tool on the right. Select the voice you'd like to use, type in your text, and click Play to hear the result!

alex's voice
(Female)
US English - Soft spoken, casual
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What is text-to-speech?

Text-to-speech (TTS) is a technology that converts written content into spoken words. It allows users to listen to a text file instead of reading it, providing an auditory representation of the content. This capability is especially useful for those who want to generate voiceovers for videos.

How to use the free text-to-speech generator?

  1. Paste your text into the tool above.
  2. Select a voice in the dropdown at the top.
  3. Hit the play button to hear the audio!

Convert text to speech online in 120+ languages

Easily localize your content and create natural-sounding voiceovers in multiple languages using Synthesia's text-to-speech technology.

  • Male and female voices
  • Integrated translation
  • Custom voice available

Create text-to-speech videos in minutes

Generate natural-sounding voiceovers for training videos, explainer videos and more by typing in text. With Synthesia, there's no need for cameras, microphones, or separate audio files.

  • AI text to voice in minutes
  • Built-in AI video editing
  • Add AI avatars to voiceovers
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AI AVATARS

Use AI avatars to narrate your videos

Add an AI presenter to your text-to-speech voiceover for increased engagement. The avatar will narrate the text with humanlike intonation.

  • 160+ AI avatars
  • Diverse and growing selection
  • Natural-looking lip sync

Explore 800+ high-quality voices

Filter through 130+ AI text-to-speech voices to find the perfect one for your content.

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We don't seem to have any languages matching your criteria just yet. Check back soon, as we are constantly adding new languages and voices.

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How to generate AI text-to-speech videos

See how you can generate videos with natural-sounding text-to-speech voices in minutes.
1.

Create an account

Sign up for Synthesia and create a new video.

2.

Type your script

Paste your text or generate a script with an AI script generator.

3.

Choose a voice

Choose from 800+ natural-sounding voices or clone your own voice. The AI voice generator will automatically convert the text and generate speech.

4.

Select an AI avatar

Make the AI voiceover more engaging by adding a realistic avatar that will narrate your text.

5.

Adjust and edit

Personalize your text-to-speech video with stock photos or your own images, videos, audio files, shapes, and more.

6.

Generate video

That's it! Now you can download, stream, embed and share your videos.

script generator example

Why choose AI text to speech by Synthesia?

Natural-sounding speech

Synthesia's text-to-speech software produces incredibly realistic speech in multiple languages and accents, while also allowing you to correct the pronunciation if needed.

Easy-to-use app interface

Synthesia offers an intuitive platform where you can create voiceovers and convert text to video seamlessly. Eliminate the need for complex editing tools.

Adjust speech with SSML tags

Enhance your TTS experience by emphasizing specific words, introducing pauses, and tweaking pronunciation for a more humanlike quality to synthesized speech.

Translate text-to-speech voiceovers

With Synthesia's integrated translation tool, effortlessly adapt any video content into a different language. Expand your reach and cater to global audiences with ease.

Customer stories

Here's why 50,000+ companies use Synthesia to create content with natural-sounding voices

G2 Logo 5 Star review

Faster video creation

"Synthesia’s AI voiceovers sold me instantly. They give us the ability to pivot and create video content much faster than before"

Ann Stutler
Senior Manager of Training & Learning at Division Maintenance Group
G2 Logo 5 Star review

No actors - no costs

"Relying on external agencies and hiring voiceover actors in multiple language was extremely costly. So it would either mean stretching the budget or no video at all."

Jason Etherington
Global L&D Sales Learning Strategy Manager at Xerox
G2 Logo 5 Star review

Speed, simplicity and ease

"We can record anytime and anywhere with greater speed, simplicity, and ease. It not only optimizes work schedules but also increases productivity and benefits the quality of our educational materials."

Tue S. Synthesia custoemr
Pedro da Silva
Global Educational Services Manager at Fiery

4 key benefits of text-to-speech tools

Text-to-speech technology is not just a fun trend. How does text-to-speech actually benefit users?

Improves accessibility

TTS is a crucial assistive technology, especially for those using screen readers, like people with visual impairments, reading difficulties, and learning disabilities.

Enhances information retention

Converting text to speech can enhance information retention by catering to auditory learners and providing an alternative way to digest content. For example, transforming written educational content into audio ensures equal access for all students.

Multilingual support

Through multilingual AI voices, businesses can offer personalized customer interactions in their native language, fostering better communication and understanding.

Save money on voiceovers

A huge advantage of using text-to-speech synthesis is the cost. Using text-to-speech tools, users can save up to 50% compared to traditional voiceover methods.

8 fun facts about the challenges of text-to-speech

1.

Making words sound right: the puzzle of text normalization

Text-to-speech (TTS) technology, akin to a computerized voice reading aloud, must decipher how to pronounce words in varied contexts. Consider "read," pronounced like "reed" or "red" depending on its usage. Humans intuitively choose the correct pronunciation, but TTS must be meticulously developed to discern the appropriate choice, navigating through the subtleties and nuances of language to deliver coherent spoken content.

2.

Number crunching challenges: saying numbers the right way

Correctly verbalizing numbers, such as "1325," which might be uttered as "one thousand three hundred twenty-five" or "thirteen twenty-five," is a complex facet of TTS technology. The technology must comprehend the context to vocalize the number accurately. This becomes particularly intricate with varying numerical formats, like Roman numerals, extending the realm of possibilities and potential pronunciations TTS must cater to.

3.

Cracking the code of abbreviations

The TTS quandary with abbreviations, like "St.," which could mean "Street" or "Saint," necessitates understanding the surrounding textual landscape to ensure accurate pronunciation. Imagine the potential confusion or humor in a GPS mispronouncing "Saint Paul St." The precision in handling abbreviations and acronyms is vital, contributing to the functionality and naturalness of the synthesized speech, especially in navigational contexts.

4.

The phoneme conundrum: translating written words to sounds

When translating written words into audible forms, TTS can leverage a dictionary method, associating words with specific sounds, or utilize rule-based approaches that rely on spelling. For instance, determining how to pronounce "cat" might involve referencing a pronunciation guide or recognizing phonetic patterns. Each method has its distinct challenges, whether dealing with unfamiliar terms or managing linguistic inconsistencies.

5.

Language quirks: different challenges for different languages

Different languages, each with its unique pronunciation rules and inconsistencies, impose distinct challenges on TTS development. For example, Spanish may appear more straightforward due to its phonetic nature, while English, replete with irregularities (e.g., "through" versus "though"), necessitates a more nuanced approach. TTS technologies must be adroitly adapted to handle each language's peculiarities and quirks.

6.

Evaluation hurdles: measuring success in speech synthesis

Evaluating TTS systems is a nuanced challenge, akin to comparing singers performing different songs. Without a universal rule or standard, assessing which system produces more natural, understandable, and pleasant speech can be subjective and complex. This evaluative challenge persists in refining and advancing TTS technologies to enhance their effectiveness and user-friendly nature.

7.

Expressing feelings: integrating emotional tones and prosody

Embedding emotional expression and rhythmic flow (prosody) into TTS systems introduces an additional layer of complexity. Visualize a digital assistant conveying happiness or sadness in its responses – achieving this requires sophisticated technology that can identify, understand, and reproduce emotional undertones and vocal rhythms, enhancing the relatability and human-like quality of synthesized speech.

8.

Handling special characters and symbols: deciphering non-standard text elements

TTS technology also contends with accurately converting symbols and special characters to speech. For instance, "H2O" must be pronounced "H two O," while mathematical expressions like "3x + 2y" necessitate a clear "three x plus two y." This requires the system to discern various contexts, like scientific notation and mathematical expressions, and apply suitable pronunciation rules, ensuring clarity and correctness in vocalized content.

FAQs

Got questions about text-to-speech?

How can I make text-to-speech?

To generate text to speech using Synthesia, simply type or paste your text file into the AI video editor, choose from 130+ different voices and optionally add an avatar. You text-to-speech video will be generated in minutes.

How does text-to-speech work?

AI text-to-speech technology processes written text and transforms it into an audio version using a digitally synthesized human voice. By analyzing the text's structure and phonetics, the system generates a vocal representation that closely mimics natural speech.

What is the most realistic text-to-voice?

The most realistic text-to-voice platform is Synthesia. It not only allows users to convert text to speech online, but also has the option of combining that audio file with a realistic AI avatar for increased engagement.

Is there any free text-to-speech?

Google Text-to-Speech is a free service provided by Google, primarily integrated into Android devices. It allows users to convert written text into spoken words using synthesized voices. While it offers accessibility features and supports multiple languages on Android, there's also an option to access it via Google Cloud services, though high usage on the cloud platform might incur costs.

Does text-to-speech use real voices?

Yes, many advanced text-to-speech software, especially those using deep learning techniques, are trained on hours and hours of real voice samples. These samples are used to train models to produce high-fidelity speech that sounds natural and human-like.

The process typically involves collecting unique voice data from various speakers, under different conditions, and with diverse content. This data is then used to train neural network-based models to generate AI voices that mimics the intonation, rhythm, and nuances of the human voice. As a result, modern TTS systems can produce speech that is often indistinguishable from a real human voice.