ToolRecipe
Stays on this device No watermark Works offline

What do you need to get done?

Drop a file here

or .

/

Open an app

Follow a recipe

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Use one tool

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Bulk file renamer

Rename many files at once with a stack of rules: find and replace, prefix and suffix, case, numbering and a new extension. A table shows the new name of every file as you change a rule, and nothing is uploaded: the renaming happens in your browser.

How to rename many files at once

  1. 1Drop your files in, or choose a folder
  2. 2Set the rules you need and watch the table
  3. 3Rename in place, or download the ZIP
  4. Your files with the new names, originals untouched in ZIP mode.

What happens to your files

  • Live preview.The "Now" and "Becomes" columns update on every keystroke.
  • Clashes are caught.Two files that would get the same name turn red, and saving waits until it is fixed.
  • Nothing is uploaded.Files are renamed by your browser, on your own device.

What you can do

  • Combine rules in one pass: find and replace (plain or regex), spaces to dashes, transliteration, special characters, case, numbering, prefix, suffix and a new extension.
  • Number files with a start value and 1 to 8 digits, before the name, after it, or instead of it.
  • In Chrome and Edge on a computer, rename the files where they are in a folder you choose (subfolders optional), then undo or save the list as CSV.
  • In other browsers, download the renamed copies as one ZIP, or a rename helper script for Mac, Linux or Windows.

Good to know

  • The rules run in a fixed order: find and replace, transliterate, special characters, spaces, case, numbering, prefix and suffix, then the extension.
  • The table shows the first 300 files. All of them are renamed, not only the ones you see.
  • A phone cannot rename files in place, so it gets the ZIP of renamed copies.

Questions

Can I rename hundreds of files at once?

Yes. Drop them in or choose a folder. The preview table shows the first 300, but every file is renamed.

Is there an undo?

In Chrome and Edge, after renaming in place, an "Undo" button restores the old names. The rename helper script also writes an undo script before it renames anything.

Does it work on a Mac, Windows and Linux?

Yes, it runs in the browser. Renaming in place needs Chrome or Edge on a computer. Other browsers and phones give you a ZIP of renamed copies.

Related tools

Recipes that use Bulk file renamer

Phone photos to client-ready filesTo JPGShrinkRenameOne PDF4 stepsUpload a PDF that is too big, in partsShrinkBy sizeNumber3 stepsTurn screenshots into labelled attachmentsOne PDFLabelSplitName4 stepsMove workouts from one app to anotherTo GPXRename2 steps

How it works

Small tools that run in your browser.

Four steps

  1. Start with a file or a task

    Drop a file, search, or pick a task.

  2. The tool opens in a window

    Open as many as you like, side by side as tabs.

  3. Results collect on the right

    Drag a result into the next tool.

  4. Save when you're done

    Saved files go to your downloads.

Who uses what

Tool sets for common jobs.

Put a tool on your home screen

The icon opens that tool, like an app.

iPhone and iPad

  1. Open the tool in Safari.
  2. Tap Share (the square with the arrow).
  3. Choose “Add to Home Screen”, then Add.

Android

  1. Open the tool in Chrome.
  2. Tap the menu (⋮) at the top right.
  3. Choose “Add to Home screen” or “Install app”.

Computer

  1. Open the tool in Chrome or Edge.
  2. Click the install icon in the address bar.
  3. Choose Install.

Skills

Claude skills we use ourselves, one job each.