How to Rename Files in Bulk for Free: Complete Guide

You don't need expensive software to rename files in bulk. Here are all the free methods available.

Free Method 1: Windows Built-in

File Explorer

Select all files (Ctrl+A)
Right-click → Rename
Type base name
Press Enter

Files become: name (1).jpg, name (2).jpg, etc.

PowerShell

Free and powerful. Open Terminal and:

powershell
# Add prefix
Get-ChildItem *.jpg | Rename-Item -NewName { "prefix-" + $_.Name }

# Replace text
Get-ChildItem | Rename-Item -NewName { $_.Name -replace 'old', 'new' }

Free Method 2: Mac Built-in

Finder Batch Rename

Select files in Finder
Right-click → Rename...
Choose rename type
Apply

Options: Replace text, Add text, Format

Terminal

bash
# Rename all jpg to photo-n.jpg
n=1; for f in *.jpg; do mv "$f" "photo-$n.jpg"; ((n++)); done

Free Method 3: Web-Based

File Renamer AI

Free tier available for basic renaming: 1. Go to File Renamer AI 2. Upload files 3. AI generates names 4. Download renamed files

The only free tool with AI-powered naming.

Free Method 4: Free Software

Windows

Bulk Rename Utility - Completely free
Ant Renamer - Free, open-source

Mac

Transnomino - Free Mac app
Finder - Built-in, free

Linux

rename command - Built-in
thunar-archive-plugin - GUI option

Comparison: Free Bulk Rename Methods

Method	Ease	Power	AI
Windows Explorer	Easy	Low	No
PowerShell	Hard	High	No
Mac Finder	Easy	Medium	No
File Renamer AI (Free)	Easy	High	Yes
Bulk Rename Utility	Medium	Very High	No

When Free Tools Are Enough

Free tools work great for:

Simple pattern replacements
Adding prefixes/suffixes
Sequential numbering
Basic text changes

When You Might Need More

Consider upgraded tools when:

You want descriptive AI-generated names
You need regular automation
You process thousands of files daily

The Best Free Option

For most users, File Renamer AI offers the best free experience:

AI-powered naming (unique to this tool)
No installation required
Works on any platform
Free tier for basic needs

Try File Renamer AI Free - Smart bulk renaming at no cost.

How to Rename Files in Bulk for Free: Complete Guide