What is File Renamer Batch?

A batch file renamer lets you define naming rules — find & replace, add prefix/suffix, sequential numbering, or regex patterns — and preview the results before downloading. Rename dozens of files in seconds without installing software.

Pick a renaming mode (find-and-replace, prefix or suffix, sequential numbering, regex, change case, insert text at a position, or rewrite the extension), watch the new names appear next to the originals in real time, and download every renamed file in one ZIP. Patterns support tokens like {n} for zero-padded counters and {name} for the original stem, with a configurable pad width so the numbers sort the way you expect.

How to use

1. Upload the files you want to rename by dragging them into the drop zone.
2. Choose a renaming rule: find & replace, prefix/suffix, numbering, regex, change case, insert at position, or rewrite the extension. Add more steps to chain them in order.
3. Preview the new names, then download all renamed files as a ZIP.

When to use

• Renaming a folder of camera photos from IMG_4521.jpg to Wedding-2024-001.jpg through Wedding-2024-200.jpg.
• Cleaning up scanned invoices that came out as Scan_1.pdf, Scan_2.pdf by adding a vendor prefix and a date.
• Removing a stale tag like '(copy)' or 'final_FINAL_v2' from a batch of design files before handing them over.

Result

Upload 30 vacation photos named IMG_001.jpg through IMG_030.jpg, apply the pattern 'Hawaii-2024-{n}' to get Hawaii-2024-001.jpg through Hawaii-2024-030.jpg.

FAQ

What's the difference between {n} and {i} in the pattern field?

{n} is the file's index padded with leading zeros (001, 002, 003 …) so the names sort alphabetically the way humans expect. {i} is the raw integer (1, 2, 3 …). Use {n} for any list longer than nine files.

Will the regex mode keep the original file extension?

Yes. Every renaming mode runs against the stem (the part before the last dot), and the extension is re-attached afterward. If you want to change or remove the extension itself, switch to the Extension mode instead.

Are the actual files on my computer renamed in place?

No. The tool reads the files, builds renamed copies inside a ZIP archive, and triggers a download. Your originals stay untouched, so you can compare before swapping them in.

How many files can I rename at once?

There's no hard cap, but the ZIP is assembled in memory. A few thousand small photos work fine; tens of thousands of large videos may run out of RAM. If a large batch stalls, split it into two passes.

Can I preview the new names before downloading?

Yes — the table beside the rule panel shows every original next to its proposed new name and updates live as you tweak the rule. If something looks wrong, fix the pattern before clicking download.

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