ToolRecipe
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What do you need to get done?

Drop a file here

or .

/

Open an app

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Use one tool

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Remove spaces from filenames

Get rid of spaces in many filenames at once. "My holiday photo.jpg" becomes "My-holiday-photo.jpg", which is safer in web addresses, scripts and the command line. You see every new name first, and nothing is uploaded.

How to remove spaces from filenames

  1. 1Drop your files in, or choose a folder
  2. 2Leave "Spaces to dashes" ticked
  3. 3Check the table, then rename or download
  4. The same files with dashes where the spaces were.

What happens to your files

  • Spaces become dashes.Several spaces in a row turn into one dash, and the extension is kept.
  • Preview first.Old and new names sit side by side before you save.
  • Nothing is uploaded.Renaming happens in your browser, on your own device.

What you can do

  • Turn every space in a name into a dash, with "Spaces to dashes" ticked from the start.
  • Want underscores instead? Type a space in "Find" and an underscore in "Replace with", and untick the dashes option.
  • Add the other options if you like: lowercase, removing special characters or numbering.
  • Rename in place in Chrome or Edge on a computer, with Undo, or download renamed copies as a ZIP.

Good to know

  • Only spaces and other whitespace in the name are changed. Other awkward characters stay unless you tick "Remove special characters".
  • Spaces at the very start or end of a name also turn into a dash. Remove them with the find and replace fields first if you do not want that.
  • If two files would end up with the same name, they turn red and saving is blocked until you fix it.

Questions

How do I replace spaces with underscores?

Untick "Spaces to dashes", type a space in "Find" and an underscore in "Replace with". The table shows the result.

Are spaces in filenames a problem?

Often. They become %20 in web addresses and need quoting in the command line. Dashes avoid that.

Does it change the extension?

No. Only the name part is changed, so photo 1.jpg becomes photo-1.jpg.

Related tools

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.