Why is the ManyChat Flow Builder Extremely Slow?

Опубликовано: 27 Май 2026
на канале: Joren Wouters
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You are probably here because you wanted to create your ManyChat flow, but the ManyChat flow builder is extremely slow.

That's why, in this video, I will break down why the ManyChat flow builder can be extremely slow on your computer and how you can fix it yourself.

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Lots of tabs and windows open
So the first thing you need to check out is whether you have a lot of different tabs & windows currently open on your computer. In fact, I would just close everything on your computer and only leave the ManyChat flow builder open.

If ManyChat is then still slow, you know that it hasn't anything to do with the large amount of tabs and windows open on your laptop.

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Check your Internet Connection
The next thing you need to check is whether you are having Wifi or Internet Connection problems. You can check this out yourself by just going to Google and searching for Internet Speed test. 
Example of a speed test: https://speedtest.net/

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Empty your cache
The next thing you can try is emptying your cache. And this is just as simple as going to your browser settings, searching for the cache option and removing it. 
In Google Chrome:
Go to Settings
Search for "Cache"
Click on "Clear browsing data"
Select the "Advanced" tab
Clear the data

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Not enough disk space on your computer
Another thing that could be causing the flow builder to be extremely slow is that you do not have enough disk space on your computer.
You can check this on a Mac by going to the left upper corner and clicking on About this mac - Storage
If you are on windows, just go to Google, search for "windows disk storage" and you can check out how you can do it on a Windows computer.
Here you can see that I have still 30 GBs left, which should be enough to have a fast flow builder.
In general, I recommend having at least 10GBs on our computer to have a smooth flow builder, but it could also be a bit less or a bit more.

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Switch to another browser
If all these things didn’t work yet, I recommend switching to another browser.
In my case, I switched to Firefox and that actually did the trick for me.
I know you might be attached to your browser and you don’t want to switch, but sometimes that is the only thing that works.

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Break up your flows
Even if switching browsers doesn’t make your flow builder faster, there is only one thing left that we can try.
And that is breaking up your flows.
In the ManyChat community, I often see images of these super large flows with a lot of different blocks and elements in them and this can make the flow builder extremely slow.
To avoid this, I always recommend breaking up your flows into smaller flows. In fact, I recommend to making a flow to a maximum of around 30 blocks. 
If you have more than 30 blocks in one flow, break it up!
And in ManyChat, you can simply do this by using the Start Flow block.

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Contents:
Intro: (00:00)
Example of a Slow Flow Builder: (00:18)
#1 - Lots of Tabs and Windows open: (01:21)
#2 - Check your Internet Connection: (02:37)
#3 - Empty your cache: (03:54)
#4 - Not enough disk space on your computer: (04:40)
#5 - Switch to another browser: (06:04)
#6 - Break up your flows: (07:44)