Why does Roblox say Bad Request?

A "Bad Request" (Error 400) means your browser sent data to Roblox that the server couldn't understand. This is usually due to corrupted "cookies" or "cache" in your browser. Clearing these files almost always fixes the problem.

Does error 400 mean I'm banned?

No. Error 400 is a technical browser error, not a moderation action. It simply means there was a communication error between your computer and Roblox servers.

How do I fix error 400 on mobile?

On mobile, try logging out and back in. If that fails, clear the Roblox app cache in your phone's settings or simply uninstall and reinstall the Roblox app.

Is error 400 Roblox's fault?

Usually, no. It's usually caused by data on your device. However, if a Roblox update has a bug, it could cause 400 errors for many people at once. Check our status page to be sure.

⚠️ Error 400

How to Fix Roblox Error 400

The request sent to Roblox servers was invalid.

●Frequency: Rare

Quick Answer

HTTP error 400 in Roblox means the server received a request it could not understand or process. This is almost always caused by corrupted browser data, cached session problems, or a misconfigured third party tool sending malformed requests to Roblox.

?What Does Error 400 Mean?

Category:http

Frequency:Rare

Platform:All Platforms

What Causes Error 400?

Corrupted browser cache

Old or corrupted cached data is causing Roblox to send an invalid request format to the server.

Invalid URL or link

The URL you are trying to access has been typed incorrectly or contains invalid characters.

Expired session cookies

Your Roblox login session cookie has expired or become corrupted.

Third party tool misconfiguration

A browser extension or tool is modifying requests in a way that makes them invalid.

⚡Try These First — Quick Fixes

Clear browser cache and cookies

Log out and log back in

Disable browser extensions

If none of these work, follow the detailed guide below.

How to Fix Error 400— 6 solutions

Clear browser cache and cookiesIn Chrome press Ctrl+Shift+Delete. Select All Time and check both Cached images and Cookies. Click Clear data then reload Roblox.

Log out and log back inSign out of your Roblox account completely then sign back in. This creates a fresh valid session.

Disable browser extensionsExtensions can modify HTTP requests and cause 400 errors. Disable all extensions and test in an incognito window.

Try a different browserOpen Roblox in a different browser to rule out browser specific issues.

Check the URLIf you are navigating to a specific Roblox page make sure the URL is correct and does not contain typos or special characters.

Restart your routerNetwork issues can occasionally cause malformed requests. Restart your router and try again.

Fix by Operating System

🪟Fix for Windows

1Open Chrome and press Ctrl+Shift+Delete
2Set time range to All time
3Check Cookies and Cached images then Clear data
4Disable all browser extensions and test in incognito window
5Try Microsoft Edge as an alternative

Frequently Asked Questions

Still getting error 400?

Report it and we will investigate and update this guide within 24 hours.

Report Error →

Related Error Codes

Error 403Access to this page or resource was denied.Error 404The page or profile you are looking for does not exist.Error 429Too many requests sent — Roblox rate limit triggered.

⚠️

Error 400 — Error 400 — Bad Request

Last reviewed: May 2026 · Verified by AskRoblox team

← All Error Codes Check Server Status →

← Back to all Roblox error codes

Player Tips & Community

Tips sourced from Reddit and Discord. Have a tip? Submit it below.

💬Join Discord

FFixItBlox

Discord38m ago

before u do anything else for any roblox error: close completely, clear cache, restart. fixes 80% of errors in under 2 minutes fr

TTechSavvyRblx

Reddit2h ago

changing dns to 8.8.8.8 fixed error 279 for me permanently. took 2 mins and hasnt come back since. try this before reinstalling

CConnectionFixer_

Discord5h ago

antivirus causes more roblox errors than people think. add roblox as an exception before anything else if ur getting random disconnects

EErrorHunter22

Reddit8h ago

vpn was causing literally every connection error i had. turned it off and everything worked first try. check that before anything else

XxXRobloxFixerXx

Discord11h ago

error 267 is not always ur fault. sometimes its a game anticheat bug. rejoin on a different server first before assuming something is wrong

QQuickFixOnly

Reddit4h ago

this error page has the best os specific fixes ive found. windows steps are actually different from mobile which most sites dont cover

Have a tip? Add yours below and it could be featured here. ↓

Share a Tip for Error 400

Know something useful other players should know? Share it here. Best tips get featured on this page.

Tips are sourced from Reddit, Discord, and player submissions. Only verified and genuinely helpful tips are featured. Usernames are displayed with permission.