12Safe PowerShell
Preview a bulk rename before changing a single file
Generate an old-name/new-name mapping first, inspect collisions, and only then perform a controlled batch rename.
BEFORE
AFTER
01 / Do it yourself
From zero to working.
Read the complete sequence before starting. Use a test account or non-production copy whenever the workflow touches important business data.
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01
STEP 1
Copy the folder or confirm a current backup.
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02
STEP 2
Run the preview command and export the mapping.
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03
STEP 3
Check duplicates, extensions, and sequence order.
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04
STEP 4
Run the approved rename in small batches.
02 / Useful starter
PowerShell · preview only
Get-ChildItem -File | ForEach-Object {\n [PSCustomObject]@{\n Old = $_.Name\n Proposed = ("2026-Project-{0:D3}{1}" -f ($script:i++), $_.Extension)\n }\n}03 / Check before you change
Useful guardrails.
✓The sample below is preview-only
✓Never target a broad system folder
✓Keep extensions unchanged
✓Retain the mapping for rollback
Do it for me
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