Do you have a hundred photos named "IMG_4821", "IMG_4822", "IMG_4823", and would you like to give them a clear name like "Construction-Trois-Rivieres-01"? Renaming each file one by one can take an hour and lead to errors. The good news is that Windows 11 lets you rename multiple files in seconds, without paid software or technical knowledge.

This practical guide shows you three ways to rename multiple files at once, from the simplest to the most powerful. Whether you're an individual organizing family photos or a small business in the Mauricie region managing hundreds of documents, you'll find the method that suits you.

1. The quick method using File Explorer

This is the simplest technique, built into Windows 11, perfect when your files are part of the same series (photos from an event, monthly invoices, screenshots). Here's how to rename multiple files in batches:

• Open the folder containing your files in File Explorer.
• Select all the files you want to rename. Use Ctrl+A to select all, or hold Ctrl and click on each file you want.
• Press the F2 (or right-click and then select "Rename").
• Type the desired base name, for example "June-Invoice", then press Enter.

Windows then renames all the files and adds a number in parentheses: "June-Invoice (1)", "June-Invoice (2)", and so on. All this in less than five seconds. This method keeps each file's extension intact (.jpg, .pdf, .docx), so there's no risk of making a file unreadable.

Quick tip: sort your files by date or name before selecting them. The numbering will follow the display order, preventing you from ending up with a jumbled sequence.

2. PowerRename: Microsoft's free, advanced renaming service

The F2 method has a limitation: it assigns everyone the same name with a simple number. If you need to replace a word, keep part of the original name, or number it in your own way, the PowerRename is for you. It's part of Microsoft PowerToys, a free and official suite of utilities.

Install PowerToys

Open the Microsoft Store, search for "PowerToys," and install the app from Microsoft Corporation. Once installed, PowerRename will be added directly to the Windows 11 right-click menu.

Use PowerRename

• Select your files, right-click, and then choose "Rename with PowerRename".
• In the "Search" field, type the text to replace (for example, "IMG").
• In the "Replace with" field, type the new text (for example, "Team-meeting").
• A real-time preview shows you the result before you confirm. Click "Apply" when everything is correct.

PowerRename also handles automatic numbering, capitalization, and even regular expressions for advanced users. It's the ideal tool for an SME that needs to rename multiple files consistently, for example, standardizing the names of hundreds of client documents at once. Our managed IT services regularly deploys PowerToys for our clients in Trois-Rivières to automate this type of repetitive task.

3. Batch rename using the command prompt

For those who like to maintain complete control, the command prompt (CMD) allows you to rename multiple files with a single line. It's fast and powerful, especially for changing a file extension or applying a specific pattern.

• Open the desired folder, click in the address bar, type cmd and press Enter.
• To change all .txt files to .csv, type: ren *.txt *.csv
• To add a prefix, a small loop is usually used, but for most common needs the ren is sufficient.

Warning: The command prompt does not ask for confirmation and does not offer a preview. Always back up your files before using it. If you are not comfortable with command lines, stick to methods 1 and 2, which are safer.

4. Best naming practices for your SME

Renaming multiple files is good. Adopting a clear naming convention from the start is even better. A good naming system saves the entire team a lot of time and makes searching easier. Here are our recommendations:

• Start with the date in YYYY-MM-DD format (for example, 2026-06-14). Your files will automatically be sorted in the correct order.
• Avoid accents and special characters (é, à, /, *, ?) which sometimes cause problems during backups or transfers.
• Replace spaces with hyphens for better compatibility with web and cloud systems.
• Be consistent : if the whole team names it "Customer-Invoice-2026", no one wastes time looking for it.

For a small or medium-sized enterprise (SME) in the Mauricie or Quebec City region that handles thousands of documents, these simple rules prevent duplicates, lost files, and versioning errors. Solid file organization is also the first step in an effective backup and cybersecurity strategy.

Frequently Asked Questions

How to rename multiple files at the same time in Windows 11?

Select all files with Ctrl+A, press F2, type the new name, and press Enter. Windows automatically adds a number to each file. For more options, use the free PowerRename tool from Microsoft PowerToys.

Can I undo a file renaming that was done by mistake?

Yes. Immediately after the operation, press Ctrl+Z in File Explorer to undo. PowerRename also offers a preview before committing, which greatly reduces the risk of errors.

Is there a limit to the number of files I can rename?

No, there's no strict limit. Explorer and PowerRename handle thousands of files at once without any problem. For very large batches, expect a few seconds of processing time, and remember to make a backup beforehand.

Need a hand with your files in Trois-Rivières?

Organizing your files properly is the foundation of efficient and secure IT. If your team is wasting time filing documents or if you want to automate these repetitive tasks, our team can help. Discover our IT services for SMEs and feel free to contact us through our contact to discuss your needs. OKTO Solutions supports businesses in Trois-Rivières, the Mauricie region, and throughout Quebec.