When the builder slows down or refuses to load, it is tempting to start deleting screens. That can waste a day and still miss the real problem. First, find out how much of the app is affected.
Which of these sounds like your problem?
- Broad: multiple people and projects are affected at the same time.
- Browser-specific: it works in a clean browser profile or another browser.
- Project-specific: a new project behaves normally but one app does not.
Your answer tells you whether to wait, check your browser, or look inside the project.
Four checks you can do in 15 minutes
1. Check the scope
Ask one teammate to open a different project from a different network. If the problem is widespread, record the start time and avoid making rushed changes to production logic.
2. Test cleanly
Use a private window or a separate browser profile. Temporarily disable extensions that alter page content, block requests, or manage passwords. Clear only the relevant site data if the clean test succeeds; you do not need to erase your whole browser to learn something useful.
3. Open a small new project
If a blank or very small project loads normally, the issue is probably tied to the production project's size, data connections, or a recently edited screen. Make a copy before you begin removing anything.
4. Compare the last change
Look for a new custom action, large list, external collection, complex conditional visibility, or a screen that was edited shortly before the slowdown. Revert one isolated change in a copy and test again.
What can make a project hard to manage
There is no magic number of screens or parts that makes an app unhealthy. Watch for screens that do too much at once, lists that load too much data, long chains of actions, and connected tools that fail without showing a message. These problems can slow the builder and the app.
For the app-side version of this problem, see our guide to Adalo performance across multiple locations.
What to send to support
- The project URL or identifier and the affected screen.
- Browser, browser version, operating system, and network.
- The exact time the issue started and whether other projects work.
- A screen recording, plus any visible error text.
- The last meaningful app change before it began.
Protect production while you investigate
Do not use a live project as a scratchpad during an outage. Work from a copy, keep a short release note for each change, and let one person decide what is safe to publish. That small discipline prevents a slow editor from becoming an app outage.
FAQ
Should I clear my cache when the Adalo builder is slow?
It is a useful test when a private window or another browser works. Treat it as one diagnostic step, not proof that your project is healthy.
When should we rebuild an Adalo app?
Only after you can describe the repeated project-level constraint. A rebuild without that diagnosis often recreates the same operational problem with a newer interface.
When your team needs someone to own releases, bugs, and the next change, book a conversation. We can assess whether the work needs a repair, a migration, or a clearer operating plan.