GLaDOS AI Voice Generator: Free Text to Speech

Hear GLaDOS

Calm, synthetic and deadpan, with sweetly passive-aggressive pitch jumps

“Hello, and welcome to the Aperture Science Enrichment Center. Please enjoy your mandatory testing.”
0:07
“Congratulations. You have completed the test. That was slower than expected, but still technically a success.”
0:07
“There will be cake at the end of this meeting. Probably. We are reviewing the paperwork.”
0:06

Or change a recording

A spoken line (Before), then the same recording in GLaDOS's voice (After).

GLaDOS

Lines to try in GLaDOS's voice

About GLaDOS's voice

GLaDOS is the artificial intelligence that runs the Aperture Science Enrichment Center in Valve's Portal games, voiced by Ellen McLain. Her voice is a calm, pleasant female tone processed into something synthetic, with odd pitch jumps between syllables, perfectly measured pacing and a deadpan sweetness that makes every compliment sound like an insult.

Tips for the best GLaDOS audio

Write polite, formal sentences that end with a quiet insult or ominous twist; GLaDOS is funniest when she sounds helpful and slightly cruel.
Use periods rather than exclamation marks, and phrases like test subject, Aperture Science and please, to keep the clinical delivery.

How to make GLaDOS say anything

Type the line
Write what GLaDOS should say, up to 500 characters (200 on the free line), or press one of the scripts below.
Or use your own voice
Switch to Change my voice, then record or upload up to 60 seconds (15 on the free line): your words, timing and shouts come back in GLaDOS's voice.
Generate and download
It plays in a few seconds. Download the MP3 for your video, meme or stream.

GLaDOS AI voice FAQ

Who voices GLaDOS?

GLaDOS is voiced by Ellen McLain in Portal and Portal 2. Her natural singing and speaking voice was processed and pitch-edited to create the calm, robotic sound fans know.

Can I make GLaDOS insult my friends?

You can write playful, deadpan lines in her style, like teasing a friend about being late. Keep it lighthearted. GLaDOS works best with dry wit rather than harsh insults.

Is the GLaDOS voice good for smart home or alarm sounds?

Yes. People use it for alarm clips, chore reminders and stream notifications. Generate a short line, download the audio and set it as your sound.

Is the GLaDOS AI voice free?

You can try it free once a day without an account: up to 200 characters, or 15 seconds of your own recording. After that, each line uses credits, and the cost shows before you generate.