Use filename tokens, dates, sequence numbers, find/replace, regex, case and extension text while a wildcard limits which files participate.
Rename the set.
Not every file.
Open a folder once. Describe the naming rule once. RENAME previews every result, catches case-insensitive collisions before touching disk, and can apply the plan with a verified safety stage and an undo path.
PATTERNSDATE + SEQUENCEREGEXCOLLISION PROOFUNDO
FILE BATCH ENGINEPORTABLE FALLBACK0 FILESREADY
FILE BATCH / RENAME V1.0Name hundreds
Name hundreds
like one decision.
Open a folder once. Build one deterministic rule, inspect every resulting filename, resolve collisions before disk writes, then apply with a verified safety stage and an undo manifest.
FULL PREVIEWCOLLISION AUDITDIRECT APPLYUNDOZIP FALLBACK
RENAME evaluates the entire batch case-insensitively so Windows/macOS collisions and stationary target files block the operation before disk changes.
Direct mode uses temporary verified copies so swaps and case-only renames cannot overwrite another source. Originals are released only after staging succeeds.
The session keeps the reverse map for one-click undo, and every plan can be exported as a machine-readable manifest before applying anything.