Does the tool read the contents of my files?

No. Only the filenames are processed. The file contents are not read or transmitted — just the names are changed when downloading.

Can I add a number sequence to all filenames?

Yes. Add a sequential number rule to append or prepend numbers like 001, 002, 003 to each filename automatically.

What if I make a mistake in the rename rules?

The preview panel shows the exact new filename for each file before you confirm. Review the names carefully before downloading.

Can I change file extensions with this tool?

Yes. Using the find-and-replace rule, you can change the extension (e.g. replace ".jpeg" with ".jpg") across all selected files.

Developer Tools

Rename multiple files using patterns and download a ZIP

Bulk File Renamer

Rename multiple files using patterns and download a ZIP

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Bulk File Renamer

Select or Drop Files

Click here or drag and drop multiple files to rename

Choose File

Any file types supportedBulk Rename

Tokens: {index}, {name}, {ext}, {YYYY}, {MM}, {DD}

Pattern helper

Tokens

{index} — sequential number (uses Start Index and padding)
{name} — original file name without extension
{ext} — original file extension
{YYYY} — 4-digit year
{MM} — 2-digit month
{DD} — 2-digit day

Examples

{index}_{name}.{ext} → 01_photo.jpgIMG_{YYYY}{MM}{DD}_{index}.{ext} → IMG_20260708_01.jpgInvoice_{YYYY}-{MM}-{DD}_{name}.{ext} → Invoice_2026-07-08_photo.jpg

Learn more about Bulk File Renamer

About Bulk File Renamer

Rename batches of files using flexible rules: add a prefix or suffix, replace text in filenames, add sequential numbers, change case, and more. Preview the new names before downloading the renamed files.

Key features

Add prefix or suffix to all filenames
Find and replace text in filenames
Add sequential numbers (001, 002, etc.)
Change filename case (uppercase, lowercase, title case)
Preview new names before downloading

How to use Bulk File Renamer

1Upload the files you want to rename
2Choose your renaming rules (prefix, suffix, replace, numbering)
3Preview the new filenames in the list
4Click "Rename & Download" to get the renamed files as a ZIP

Frequently asked questions

Does the tool read the contents of my files?: No. Only the filenames are processed. The file contents are not read or transmitted — just the names are changed when downloading.
Can I add a number sequence to all filenames?: Yes. Add a sequential number rule to append or prepend numbers like 001, 002, 003 to each filename automatically.
What if I make a mistake in the rename rules?: The preview panel shows the exact new filename for each file before you confirm. Review the names carefully before downloading.
Can I change file extensions with this tool?: Yes. Using the find-and-replace rule, you can change the extension (e.g. replace ".jpeg" with ".jpg") across all selected files.