OneDrive Path Checker

OneDrive Path Checker scans local folders, network drives, and OneDrive-synchronized folders to identify files and paths exceeding Microsoft character limits. The tool detects URLs longer than 400 characters (blocked by SharePoint) and file paths longer than 255 characters (Windows limit for synchronization). Results are displayed on screen and can be exported to CSV. All processing runs 100% locally with no data transmitted externally. Built for IT administrators and SharePoint migration managers.

★★★★★

3.0(1 ratings)

• Detection of URLs exceeding 400 characters. Identifies all files and folders with full paths longer than 400 characters, the hard limit enforced by SharePoint during migrations. The tool flags each item that would cause upload rejection, enabling correction before migration starts.
• Detection of paths exceeding 255 characters. Locates file paths that exceed the Windows file system limit of 255 characters. These files cannot open or sync correctly with OneDrive. The scanner displays exact length and full path for every problematic item.
• Local drive, network drive and OneDrive folder scan. Allows selection of any directory: internal hard disks, mapped network drives, and OneDrive root folders. The tool recursively traverses all subdirectories regardless of storage type.
• Excel export (CSV format). Generates a detailed report with all scanned paths, showing total length, longest path segment, and character excess relative to the applicable limit. The CSV file opens in Excel for filtering and management.
• 100% local analysis with no data transmission. All scanning executes exclusively on the workstation. No file paths, folder names, or metadata leave the user's machine. No external server connections or telemetry.
• Single executable with no installation required. The application is a single .exe file that runs without installation or dependencies. It executes directly from any folder, USB drive, or network location. No administrator privileges needed.
• Fast scan mode with complete directory tree traversal. Implements file system walking algorithms that minimize disk access time, displaying results in real-time as thousands of files are analyzed.
• On-screen display with sortable columns. Results appear in an interactive table sortable by file name, full path, character length, or limit type exceeded (SharePoint or Windows). Enables quick location of the longest items.
• Scan statistics summary. Upon completion, the tool presents a summary with total files scanned, count of paths exceeding SharePoint limit, count exceeding Windows limit, and percentage of problematic items.
• UNC path and network drive support. Correctly analyzes network paths in UNC format (\\server\share) and mapped drives. Respects current user access permissions and skips directories without read access.

OneDrive Path Checker development started in 2023 by a team of engineers specializing in SharePoint and Microsoft 365 migrations. The developers identified that most migration failures and OneDrive synchronization problems originated from excessively long file paths, an aspect not directly addressed by native Microsoft tools. The software is written in C# using .NET Framework, leveraging Windows file system access libraries to ensure maximum compatibility with long paths and scanning performance.

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