Sign-in & Login Problems

How to Fix the 413 Header Too Long Error When Signing In

Olivia Miller Oct 19, 2026 869 views

Question details

The user is unable to sign in, reset their password, or access online PDF conversion tools due to a 413 Header Too Long browser error.

How to Fix the 413 Header Too Long Error When Signing In

Product: Browser / Web Account
Device & OS: not provided
Scenario: Attempting to log into an online account, reset account credentials, or convert PDF files via a web portal.
Observed behavior: The web page fails to load and instead displays a '413 Header Too Long' error message, blocking further user actions.

Before you start

Make sure you have your account login credentials accessible, as you may need to sign back in after clearing your browser data.

Solution 1Recommended

Clear Your Browser Cookies and Cache

Removing corrupted or excessively large cookie files usually resolves the 413 error immediately.

The '413 Header Too Long' error typically occurs when the size of the request headers sent by your browser exceeds the server's allowed limit. This is almost always caused by an accumulation of outdated or corrupted cookies tied to the specific website you are trying to access.

Access Browser Settings

Click the three-dot menu icon in the top right corner of your browser (such as Chrome or Edge) and select 'Settings'.

Navigate to Privacy Settings

Click on 'Privacy and security' from the left-hand sidebar, then select 'Clear browsing data'.

Select Cookies and Cached Data

Choose a time range of 'All time'. Check the boxes for 'Cookies and other site data' and 'Cached images and files'.

Clear Data and Restart

Click the 'Clear data' button. Once finished, close all browser windows and reopen the browser to try signing in again.

Sign-in Required: After clearing your cookies, you will need to log back into most websites, so keep your passwords handy.

Solution 2

Use a Different Supported Browser

Switching to an alternative browser provides a quick workaround if you urgently need to access your account or convert a PDF.

Solution 3

Reset Your Password via the Dedicated Help Page

Using the specific account help and recovery page can sometimes bypass the redirect loops causing the error on the main sign-in page.

Convert PDFs Offline Without Browser Errors

Use WPS Office for Hassle-Free PDF Conversion

If browser errors like '413 Header Too Long' are stopping you from converting PDFs online, switch to a reliable desktop application. WPS Office provides powerful built-in PDF tools that work entirely offline, letting you view, edit, and convert PDFs to Word or Excel without relying on a web browser.

1. Download and Install WPS Office: Download WPS Office for free from the official website and complete the installation on your computer.
2. Open the PDF Toolkit: Launch WPS Office and click on the 'PDF' tab on the home screen to access the dedicated PDF toolkit.
3. Select Your Conversion Type: Click 'PDF to Word', 'PDF to Excel', or whichever conversion format you require from the top toolbar.
4. Convert Locally: Add your document to the conversion window and click 'Convert'. Your file will be processed instantly on your device.

Convert PDFs to Word, Excel, and PowerPoint locally without internet dependencyFully compatible with mainstream Microsoft Office and Adobe PDF formatsEliminate browser cache and cookie-related login errors completelyLightweight, fast, and features a familiar user-friendly interface

microsoft office alternative - wps office

Frequently Asked Questions

What exactly does a 413 Header Too Long error mean?

This error means the data (specifically the HTTP headers) your browser is sending to the website's server is too large for the server to process. It is almost always caused by too many cookies being stored for that particular site.

Will clearing my cache and cookies delete my saved passwords?

Clearing cookies will log you out of active sessions on websites, but as long as you do not select the option to clear 'Passwords and other sign-in data', your saved passwords will remain intact in your browser's password manager.

Why does this error only happen on the sign-in page?

Sign-in and authentication pages often generate complex, temporary cookies to verify your identity. If previous sessions didn't close properly, these security cookies can stack up in your browser until they exceed the size limit the server accepts.

Can I prevent the 413 Header Too Long error from coming back?

You can minimize the chances of it returning by regularly clearing your browser's cookies and cache, or by using 'Incognito' or 'Private Browsing' modes when using web-based PDF conversion tools, as these modes do not save cookies after you close the window.

Login & Account Issues