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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Add prefix/suffix to filenames

Put text in front of or after the name of many files at once, for example a date, a project code or "_final". The suffix goes before the extension, so report.pdf stays a PDF. You see every new name before anything is renamed, and nothing is uploaded.

How to add a prefix or suffix to filenames

  1. 1Drop your files in, or choose a folder
  2. 2Type the text in "Prefix" and "Suffix"
  3. 3Check the "Becomes" column and save
  4. Every file with your text added, extensions intact.

What happens to your files

  • Extensions stay put.The suffix lands between the name and the extension: scan.pdf becomes scan_v2.pdf.
  • Preview first.A table shows each old and new name side by side, so you can see it before you save.
  • Nothing is uploaded.The renaming happens in your browser, on your own device.

What you can do

  • Add text before the name with "Prefix", after it with "Suffix", or both in one go.
  • Combine it with the other options on the same page: numbering, a find and replace, or a new case.
  • In Chrome and Edge on a computer, rename the files where they are in a folder you choose, with an Undo button. Other browsers give you renamed copies in a ZIP.

Good to know

  • Spaces and punctuation you type are used as they are. If you want a separator, put it in the field yourself, for example "2026-".
  • Prefix and suffix are added last, so the other options (case, spaces, numbering) do not change the text you typed.
  • If two files would end up with the same name, they turn red and saving is blocked until you fix it, for example by adding numbering.

Questions

How do I add text to the end of a filename but before the extension?

Type it in "Suffix". The extension is kept apart, so "photo.jpg" with the suffix "_edit" becomes "photo_edit.jpg".

Can I add a prefix to a whole folder of files?

Yes, in Chrome or Edge on a computer: choose the folder, tick "Include subfolders" if you want, and the files are renamed in place. Elsewhere you drop the files in and get a ZIP of renamed copies.

Can I undo it?

In place, yes: an "Undo" button puts the old names back. With a ZIP your originals are never touched.

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.