Preview renamed copies, detect unsafe names and collisions, and download original file bytes in a local ZIP.
Browser only · Originals unchanged
Inputs stay in this browser. This tool does not upload file contents or contact external processors. Reset clears previews and download links; it does not securely erase device storage.
1–100 files; up to 10 MiB each and 50 MiB combined. Order follows file selection. Originals are read only. The ZIP contains flat renamed copies with unchanged contents, without compression, encryption or original timestamps. Extract it to a new folder and review names before use.
The final extension is preserved. Find/replace is literal and case-sensitive. Prefix, modified stem, suffix, number and extension are joined in that order. Blank find text skips replacement. Unsafe portable names are rejected, including paths, control characters, reserved system names and leading/trailing dots or spaces. Output names are limited to 180 UTF-8 bytes. Case and normalized-name collisions block export.
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