SharePoint Document Issues

How to Fix SharePoint 400-Character URL and File Path Limits

Nimra Malik Oct 21, 2026 868 views

Question details

Resolve the issue of file paths exceeding the 400-character limit to successfully upload or sync files.

How to Fix SharePoint 400-Character URL and File Path Limits

Product: SharePoint and OneDrive
Device & OS: not provided
Scenario: Uploading or syncing deeply nested files and folders to Microsoft 365 cloud storage.
Observed behavior: The system blocks the upload or sync because the complete decoded file path, including folders and the file name, exceeds the 400-character limit.

Before you start

Identify the specific files failing to sync and review their full directory paths to determine which parent folders have unnecessarily long names.

Solution 1Recommended

Shorten File Names and Folder Structures

Reduce the length of file and folder names to stay within the 400-character decoded path limit before uploading to SharePoint.

SharePoint and OneDrive enforce a strict 400-character limit on the entire file path, which includes the drive letter, folder structure, and the file name itself. Because this limit is applied after URL decoding, special characters that are converted to longer strings during encoding will still count against this limit.

Flatten your directory structure

Navigate to the top-level folder where the problematic file is stored. Move files closer to the root directory to eliminate deeply nested subfolders.

Rename folders

Right-click unnecessary or verbose subfolders and select 'Rename'. Use shorter names, acronyms, or abbreviations.

Shorten the file name

Right-click the specific file, select 'Rename', and give it a concise name before attempting to upload it to SharePoint or OneDrive.

Shorten File Names and Folder Structures

Pro Tip: Individual path segments (like a single folder name or file name) are strictly limited to 255 characters. Keep segment names under 50 characters to prevent cumulative limits from being reached.

Solution 2

Check and Adjust Local OS Path Limits

Ensure that synchronized files are not being blocked by the local operating system's maximum path length limitations.

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Frequently Asked Questions

Can I use URL encoding to bypass the 400-character limit in SharePoint?

No. The 400-character limit applies after URL decoding. When SharePoint processes the URL, it evaluates the decoded length, meaning URL encoding will not help you bypass the restriction.

What is the maximum character limit for an individual folder or file name in SharePoint?

Individual path segments, such as a single folder name or the file name itself, are strictly limited to 255 characters. However, the entire path combined still cannot exceed 400 characters.

Why am I getting a path length error when syncing to my PC even though the path is under 400 characters?

Synced files are also subject to your local operating system's path limits. Older versions of Windows or systems without Long Paths enabled have a maximum path limit of 260 characters, which may restrict syncing before SharePoint's limit is reached.

Document & File Issues