Fixity Labs
OneDriveSyncFixer icon
FXL-001 Available

OneDriveSyncFixer

OneDrive & SharePoint Sync Fixer

Find the file and folder names that OneDrive and SharePoint refuse to sync, and fix them with a full preview.

  • Desktop app
  • Windows
  • Version 1.6.9
OneDriveSyncFixer Windows
  1. Unsupported characters Q3 report: final?.xlsx becomes Q3 report- final-.xlsx
  2. Reserved _vti_ sequence _vti_archive becomes -vti-archive
  3. Reserved Windows name CON.txt becomes _CON.txt
  4. Trailing space Invoices becomes Invoices

How the naming rules are applied. Illustration, not an application screenshot.

Overview

One file name can stall a whole sync

OneDrive and SharePoint reject some names that Windows allows. A name containing one of these characters, a leading or trailing space, or the sequence _vti_ will not sync, and it is easy to miss among hundreds of folders.

OneDriveSyncFixer finds these items in a single scan and explains why each one is a problem.

OneDriveSyncFixer is a Windows application that checks every file and folder name in a local folder against OneDrive and SharePoint naming rules.

Scanning is read-only: it never renames, deletes or uploads anything. Findings are grouped by type and priority, and a safe replacement name is suggested wherever one is possible.

Characters OneDrive and SharePoint reject

  • "
  • *
  • :
  • <
  • >
  • ?
  • /
  • \
  • |

What it does not do

  • It does not sign in to Microsoft 365 or inspect cloud paths in SharePoint or OneDrive. Results show local risks, not every sync failure.
  • Undo covers local names only and is best effort. It cannot reverse cloud sync or restore shared links.
  • It is not a backup or cloud restore tool.

Features

What you get in each edition

Free edition

  • Unsupported charactersFinds file and folder names containing " * : < > ? / \ |.
  • Leading or trailing spaces and dotsFlags names the cloud rejects and that can cause compatibility problems in Windows.
  • Reserved namesDetects _vti_ anywhere in a name, and Windows device names such as CON, PRN, AUX, NUL, COM1–9 and LPT1–9.
  • Long pathsWarns about local paths over 260 characters and relative paths approaching SharePoint’s 400-character cloud limit.
  • System and temporary filesSeparates .lock, desktop.ini and ~$ Office lock files, and never renames them automatically.

Pro editionIncludes everything in Free

  • Batch rename with previewSelect the fixable items, review every proposed name, then approve the change.
  • UndoEvery change is written to a journal first, so the last batch can be reversed.
  • CSV and JSON reportsExport findings to share them or keep a record.

Editions and licensing

Pricing and license terms

Payment is handled on Lemon Squeezy’s hosted checkout. Card details never pass through the application.

Free

Free

No license needed

  • Unlimited local scans
  • Issue count, type and priority

Pro

$19.99

One-time payment

  • Full name, path and suggested name for every issue
  • Open the location in File Explorer
  • Batch rename with full preview
  • Undo the last batch
  • CSV and JSON reports

How the license works

  • The Free edition needs no license for scanning.
  • Pro is activated on your PC. To move to a new computer, use “Release PC” on the old one first.
  • The license is validated online from time to time and works offline for up to 7 days.

The license agreement and refund terms have not been published yet.

Requirements

System requirements and version

Operating system
Windows, 64-bit (x64)
Runtime
Single self-contained file. No separate .NET installation needed
Internet
Not needed for scanning. Needed for Pro activation and periodic validation
Current version
1.6.9

In this version

  • Free shows the number, type and priority of issues. Full names and paths unlock with Pro.
  • After activating Pro, existing scan results show in full without rescanning.

Getting started

Before you start

  • Back up your files and pause OneDrive sync before applying fixes.
  • Renaming a folder changes every path inside it and can break shared links.
  • Try changes on a copy of the folder first.
  • CSV and JSON reports contain local paths. Store them as sensitive data.

Troubleshooting guides

Understand the problems OneDriveSyncFixer addresses

Manual steps for each issue, based on Microsoft’s documentation. Useful whether or not you use OneDriveSyncFixer.

FAQ

Frequently asked questions

Are my files sent anywhere?
No. Scanning happens on your computer, and file names and contents are never sent to a server. Only during Pro license operations are the license key, a check against the purchase email and a one-way hash of the device ID sent to the license provider, Lemon Squeezy.
Does scanning change my files?
No. Scanning never renames, deletes or uploads files. Changes happen only in Pro, after you review the preview and approve it.
What is the difference between Free and Pro?
Free runs unlimited scans and shows how many issues were found, their type and priority. Pro reveals the full name and path of each item, and adds batch renaming with a suggested name, undo and CSV/JSON reports.
Does it fix every OneDrive sync error?
No. It finds local problems caused by file and folder names. It does not diagnose account, storage quota, network or server errors.
What happens to my license if I change computers?
On the old computer, open “License & Plans” and choose “Release PC”, then activate on the new one. If you can no longer access the old device, contact support to reset the activation.
Can I use it offline?
Scanning needs no internet connection. Once Pro is activated, it works offline for up to 7 days, after which it needs to validate online again.

OneDrive and SharePoint are trademarks of Microsoft Corporation. OneDriveSyncFixer is independent software and is not developed or endorsed by Microsoft.