A name that works on your computer can still fail when it is synced, shared, or moved elsewhere.
Readout
Enter a name above to check it.
Suggested safe version
Some characters were simplified for broader compatibility.
Suggested names are compatibility recommendations only. The tool does not check whether the name already exists in your system.
Rules at a glance
Four principles cover most of what the checker catches
The full best-practices guide explains the rest, including folder structure, path length, and platform notes.
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Safe characters
Letters
a-z, numbers0-9, hyphens. One period, for the extension. Avoid spaces, underscores, and symbols like* : < > ? | # % &. -
Lowercase
report.docxandReport.docxcan appear as duplicates when synced. Lowercase keeps names consistent across systems and URLs. -
Dates and versions
Dates as
YYYY-MM-DDat the start. Versions asv01,v02at the end. Both sort naturally. NeverFINAL. -
Path length
Stay under 260 characters for the full path. Long folder names nested deeply push you over the limit faster than you expect.