FiveM Script Optimizer
FiveM server lag is almost always a few resources doing expensive work too often. This free browser tool scans your Lua and JavaScript for busy-wait loops, broadcast events and blocking database calls, then returns a health score and the exact file and line behind each problem.
Find out exactly what is making your FiveM server lag. Upload a resource or your whole server and get an instant performance report: the busy wait loops, the overloaded events, the synchronous database calls and the state bag spam that eat frame time and drive up resmon. You get a server health score, a severity breakdown and the specific lines behind each problem. The scan runs in your browser, so your code never leaves your machine.
How it works
- 1
Upload your resources
Drop in a single resource or a zip of your whole server. Everything is read locally in the browser.
- 2
We scan for known lag patterns
The analyzer walks your Lua and JavaScript looking for the patterns that cost performance under real player load: per frame loops, broadcast events, blocking queries and more.
- 3
Read the report
Get a health score out of 100, a count of issues by severity, and the exact file and line for each finding with an explanation of why it hurts.
- 4
Fix it or send it to us
Use the report to fix the hot spots yourself, or download it and hand it to our team for a paid optimization pass.
Features
Catches the real lag causes
Busy wait loops with Wait(0), events broadcast to every client, synchronous MySQL calls in hot paths, unbounded threads and heavy per frame work.
Server health score
A single number that tells you at a glance whether a resource is clean or a problem, plus a breakdown by critical, high, medium and low.
Points at the exact lines
Every finding names the file and line and explains the cost, so you are not guessing where the milliseconds are going in resmon.
Private by design
The analysis runs entirely in your browser. Your source is never uploaded to us, which matters when the code is paid or proprietary.
Why use this instead of reading resmon line by line
resmon tells you a resource is heavy, but not why. Finding the actual cause means opening the code and hunting for the loop or the query that is doing the damage, which takes experience and time you may not have during a live incident. This scanner encodes that experience: it knows the patterns that make FiveM servers lag and points straight at them, so you go from a high resmon number to the exact lines in seconds.
- From resmon number to root cause in seconds
- Knows the anti patterns experienced devs look for
- Scores every resource so you know what to fix first
- Runs locally, so paid code stays private
Frequently asked questions
Why is my FiveM server lagging?
Server side lag on FiveM almost always comes from a few resources doing expensive work too often: loops that run every frame, events broadcast to all clients, synchronous database queries in hot paths, and state bag writes on every tick. This scanner finds those patterns and shows you which resource and which line is responsible.
Is the script optimizer free?
Yes, the scan and the report are free for our Discord community. If you want us to actually rewrite the hot spots for you, that is an optional paid service.
Does my code get uploaded to your servers?
No. The analysis runs entirely in your browser. Your Lua and JavaScript never leave your machine, so it is safe to scan paid or proprietary resources.
What does the health score mean?
It is a single number out of 100 that summarizes how clean a resource is against our rule set, weighted by how severe each issue is. A low score means there are patterns that will cost you performance under load.
Does it work with ESX, QBCore and Qbox?
Yes. The analyzer reads plain Lua and JavaScript, so it works with any framework. It detects your framework to give better context but does not depend on one.
Will it fix the problems automatically?
The free tool shows you where the problems are and why they matter. It does not rewrite your code. If you want the fixes applied, send us the report and our team can do the optimization pass.
How is this different from resmon?
resmon tells you how much time a resource uses right now. It does not tell you why or which line. This scanner reads the code and names the specific patterns and lines causing the cost, which is the part resmon leaves to you.
More free FiveM tools
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OpenFiveM Loading Screen Creator
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OpenAll FiveM tools
See the full set of free tools in THE ORB Studio.
Built by THE ORB, for FiveM servers
These tools are free. When you want finished, supported resources for your server, our store has them.