Phet.colorado.edu Current Status

*Current Status is based on reports from UpdownRadar users and social media activity data

Website: phet.colorado.edu

Free science and math simulations for teaching STEM topics, including physics, chemistry, biology, and math, from University of Colorado Boulder

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Forum & Comments (27)


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Is Phet.colorado.edu down today April, 2026?

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 Phet.colorado.edu status: NO ISSUES  27 comments
We consider Phet.colorado.edu to be down or experiencing issues when the current volume of user reports rises above the typical level we receive for Phet.colorado.edu at that time. Learn more

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Forum & Comments

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Admin    •    comment pinned    #
Possibly, redirect from different versions is configured incorrectly on phet.colorado.edu. In this case, use the links below:

http://phet.colorado.edu    https://phet.colorado.edu    http://www.phet.colorado.edu    https://www.phet.colorado.edu


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Guest    •   145 days ago  # 18 November 2025 + 0 -

No links from any source work. Error 500.
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Guest    •   1111 days ago  # 28 March 2023 + 0 -
★ ★ ★ ☆ ☆

Its a decent website, a bit dated, but it's servers are about as reliable and stable as a wet towel apparently.
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Guest    •   1133 days ago  # 6 March 2023 + 0 -

Website or any links is not working from Germany, Berlin
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Guest    •   1133 days ago  # 6 March 2023 + 0 -

Can’t access any of Phet webpages. Error access forbidden
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Guest    •   1133 days ago  # 6 March 2023 + 2 -

not working, cant do our lab
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Guest    •   1133 days ago  # + 6 -

just a big 403 error on all pages
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Guest    •   1133 days ago  # + 6 -

No pages are loading, can't do our planned lab! SF, CA
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Guest    •   1133 days ago  # + 12 -

not working at all
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Guest    •   1265 days ago  # + 1 -

Nothing From USA, MO
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Guest    •   1265 days ago  # + 0 -

half the class can get in, others cannot. My two teacher computers cannot
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Guest    •   1265 days ago  # + 0 -

Website or any links is not working from USA, TX
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Guest    •   1265 days ago  # + 0 -

Website or any links is not working from USA, TC
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Guest    •   1265 days ago  # + 0 -

Never mind it's back up
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Guest    •   1265 days ago  # + 0 -

Website or any links is not working from USA, WA
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Guest    •   1265 days ago  # + 0 -

Website or any links is not working
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Guest    •   1333 days ago  # + 0 -

PhET website is back up, so please try again! So sorry for the inconvenience.
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Guest    •   1333 days ago  # + 0 -

site showing forbidden today 19th August in Australia
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Guest    •   1333 days ago  # + 0 -

I'm also getting the Forbidden today.
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Guest    •   1333 days ago  # + 0 -

Anyone else getting Forbidden today? Full access yesterday, not accepted today. This website says it's working, but there isn't anything that is working for us. Trying to connect from Seoul.
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Guest    •   1452 days ago  # + 0 -

site down from Italy
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Guest    •   1452 days ago  # + 0 -

Site seems to be down, hopefully it comes back up soon!
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Guest    •   1452 days ago  # + 0 -

No links work for me either, east coast
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Guest    •   1452 days ago  # + 0 -

None of admin's links are working for me in Minnesota. The site itself seems to be down, because everything else is connecting just fine for me.
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Guest    •   1644 days ago  # + 0 -

I'm glad to see that it's not just me, and that others are not able to connect to PhET.
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Guest    •   1644 days ago  # + 0 -

Cannot access Phet Website
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Guest    •   1916 days ago  # + 0 -

The site is down.
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Guest    •   1916 days ago  # + -2 -
Comment is hidden.


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