Renaming 500 files one by one takes about 40 minutes. I know because I timed myself doing it last year when a client sent me a folder of screenshots named things like IMG_20250814_143022.jpg. That was the day I started testing every batch file renamer I could find.
Over the past 14 months, I have used 13 different batch renaming tools across Windows, Mac, and Linux. Some were overkill. Some barely worked. Here are the ones that actually saved me time.
| Tool | Platform | Best For | Regex | Price |
|---|---|---|---|---|
| Bulk Rename Utility | Windows | Power users, huge file sets | Yes | Free (personal) |
| PowerRename (PowerToys) | Windows | Quick renames from right-click | Yes | Free |
| Advanced Renamer | Windows | EXIF/metadata-based renaming | Yes | Free |
| Ant Renamer | Windows | Simple bulk renames | No | Free |
| NameChanger | Mac | Mac users wanting a GUI | Yes | Free |
| Finder (built-in) | Mac | Basic renaming, no install | No | Free |
| GPRename | Linux | GTK-based Linux renaming | No | Free |
| KRename | Linux (KDE) | KDE users, plugin support | Yes | Free |
1. Bulk Rename Utility – Best Overall for Windows
Look, the interface is ugly. I am not going to pretend otherwise. Bulk Rename Utility looks like it was designed in 2003, and honestly it probably was. But here is the thing – it handles operations that crash other tools.
I tested it with a folder containing 47,000 music files. The preview loaded in about 4 seconds. Every other free tool I tried either froze or took over a minute to populate the list. That performance gap matters when you are working with large media libraries or server backups.
What makes it different from simpler tools is the sheer number of renaming methods you can combine. You can remove characters from position 3 to 7, add a prefix, change the case, replace text with regex, and append a sequential number – all in one pass. Most tools make you run multiple passes for this.
What I actually use it for
My main use case is organizing downloaded files. I get batches of documents from clients with names like SCAN_DOC (1).pdf through SCAN_DOC (200).pdf and need them renamed to something like 2026-04-invoice-001.pdf. Bulk Rename Utility does this in one operation.
The regex support is full Perl-compatible, which means you can do things like capture groups. For example, renaming report-Q1-2026.xlsx to 2026-Q1-report.xlsx by capturing the parts and rearranging them.
The downsides
The learning curve is real. I spent about 30 minutes just figuring out what each panel does. There are 14 different sections on the main screen, and the labels are not always clear. The “Numbering (10)” section, for instance, has nothing to do with the number 10 – that is just how many options it has. Also, there is no Mac or Linux version. Windows only.
Platform: Windows 7/10/11
File size: 12 MB
Max files tested: 47,000 with no issues
License: Free for personal use, $25 for commercial
2. PowerRename (Microsoft PowerToys) – Best for Casual Use on Windows
If Bulk Rename Utility is a power drill, PowerRename is a screwdriver. You do not need it for everything, but when you do, it is right there in your context menu.
PowerRename is part of Microsoft PowerToys, which means it comes bundled with a dozen other useful Windows utilities. After installing PowerToys, you just select files in Explorer, right-click, and pick PowerRename. No separate app to open.
The interface is clean – two text boxes (search and replace), a few checkboxes for options, and a live preview showing what each file will be renamed to. It supports regular expressions, case-sensitive matching, and you can limit it to filenames only, extensions only, or both.
Where it falls short
No sequential numbering. That is the big missing feature. If you need to rename files to photo-001.jpg, photo-002.jpg, and so on, PowerRename cannot do it. You will need Bulk Rename Utility or Advanced Renamer for that.
It also cannot rename based on metadata. No EXIF dates, no file creation times, no ID3 tags. It is strictly text-in, text-out renaming.
But for what it does – find-and-replace across hundreds of files – it is the fastest option I have tested. I renamed 800 HTML files in about 2 seconds.
Platform: Windows 10/11
Part of: PowerToys (free, open-source)
Regex: Yes (ECMAScript flavor)
Install size: ~100 MB (full PowerToys suite)
3. Advanced Renamer – Best for Photo and Music Organization
Advanced Renamer does something most free tools do not: it reads file metadata. EXIF data from photos, ID3 tags from music files, GPS coordinates, video codec info – all of it is available as renaming tokens.
I used it to rename 12,000 photos from a family archive. The files came from five different cameras and three phones, all dumped into one folder with random names. I set up a rename pattern like <Img Year>-<Img Month>-<Img Day>_<Img Hour><Img Min><Img Sec> and every photo got renamed to its actual capture timestamp. The whole thing took maybe 15 seconds.
The method list approach is smart too. Instead of cramming everything into one screen like Bulk Rename Utility does, you build a sequence of rename methods that run in order. Add a “New Name” method, then a “Remove Pattern” method, then a “Numbering” method. Each one shows a preview. It feels less overwhelming.
What caught me off guard
The batch mode lets you save rename profiles. I have one called “client-deliverables” that strips spaces, converts to lowercase, adds a date prefix, and replaces underscores with hyphens. One click and it applies to whatever I drag in.
There is also an undo log. If you mess up a rename, you can reverse it from the log. I have only needed this twice, but both times it saved me from manually renaming 200+ files.
Platform: Windows 7/10/11
EXIF support: Yes (photos, music, video)
Undo: Yes, via rename log
License: Free for personal use, commercial license starts at $20
4. Ant Renamer – Best for Beginners
Not everyone needs regex. If you just want to add a prefix to 50 files or replace spaces with dashes, Ant Renamer gets the job done without making you feel like you are programming.
The interface uses tabs for different rename operations: change extension, replace string, insert text, move characters, change case, enumerate. Pick a tab, set your options, preview, apply. That is it. No documentation needed.
I gave this to a colleague who needed to rename about 300 scanned documents. She had never used a batch renamer before and figured it out in under 5 minutes. Try doing that with Bulk Rename Utility.
Limitations
No regex, no metadata reading, no complex multi-step renames. You pick one operation and apply it. If you need to do two things – say, replace text AND add numbering – you need to run two separate passes. It handles this fine, but it is not as efficient as tools that combine operations.
The last update was in 2020. It still works fine on Windows 11, but do not expect new features.
Platform: Windows
Portable: Yes (no install needed)
Last updated: 2020
License: Free (open-source, GPL)
5. NameChanger – Best Free Option for Mac
Mac users have fewer options for batch renaming, and most of the good ones cost money. NameChanger is the exception. It is free, lightweight, and handles the most common renaming tasks without any fuss.
Drag files in, set your rename pattern, and hit the Rename button. The preview updates in real time so you can see exactly what will happen. It supports find-and-replace, sequential numbering, date/time insertion, and regex.
I tested it alongside Finder’s built-in rename feature (more on that below) and NameChanger wins in every scenario except the most basic ones. The regex support alone makes it worth installing. I used it to strip everything after the first underscore in 400 filenames – something Finder simply cannot do.
One annoyance
It does not support subfolder recursion. If you have files nested in multiple folders, you need to drag each folder’s contents separately. For flat folder structures this is fine, but if you are trying to rename files across a whole project directory tree, you will need to use Terminal or a paid app like Renamer.
Platform: macOS 10.12+
Size: 3 MB
Regex: Yes
License: Free
6. Finder Built-in Rename (Mac) – Already on Your Mac
A lot of Mac users do not know this exists. Select multiple files in Finder, right-click, and choose “Rename [X] Items.” Apple added this in OS X Yosemite and honestly it covers about 60% of batch renaming needs.
You get three modes: Replace Text (find and replace within filenames), Add Text (prepend or append text), and Format (replace the entire name with a name + counter, like “Vacation-001.jpg”).
I used it to rename screenshots for a blog post. macOS names them Screenshot 2026-04-15 at 14.32.05.png and I needed them as step-1.png, step-2.png, etc. The Format mode did this in about 10 seconds.
Where it stops being useful
No regex. No conditional logic. No metadata. You cannot remove characters from specific positions or rearrange parts of a filename. If you need to turn IMG_20260415_143205.jpg into 2026-04-15_photo.jpg, Finder cannot do it. That is where dedicated file tools come in.
But for simple operations – adding a project prefix to 100 files, replacing spaces with hyphens, sequential numbering – Finder is perfectly fine and requires zero installation.
Platform: macOS 10.10+
Install: None (built-in)
Regex: No
Best for: Quick, simple renames
7. GPRename – Best for Linux (GTK)
Linux has rename and mmv in the terminal, but sometimes you want a GUI. GPRename is the simplest graphical batch renamer for Linux desktops running GTK-based environments like GNOME, XFCE, or MATE.
It does not try to do everything. You get find-and-replace, case conversion, insert/delete characters, and numerical renaming. The interface is one window with a file list on the left and options on the right. Select files, pick your operation, preview, apply.
I installed it on Ubuntu 24.04 with sudo apt install gprename and it was ready in under a minute. Renamed a batch of 600 log files from a server backup. Worked fine, no crashes, no weird behavior.
Why not just use the terminal?
Honestly, if you are comfortable with bash or Python, you probably do not need GPRename. A quick for loop or the rename command is faster for power users. But GPRename is useful when you want to see a preview before committing, or when you are renaming files with tricky characters that are annoying to escape in the shell.
Platform: Linux (GTK)
Install: apt install gprename / available in most distros
Regex: No
License: Free (GPL)
8. KRename – Best for KDE Linux Users
KRename is the KDE equivalent of GPRename, but with more features. It supports plugins, regex, file attribute-based renaming (date modified, file size, permissions), and even custom JavaScript functions for rename logic.
The plugin system is what sets it apart. There are plugins for reading EXIF data, translating filenames between languages, and generating checksums. I used the date plugin to sort 2,000 backup files by their modification date – something that would have taken a custom script otherwise.
If you are running KDE Plasma, KRename integrates into Dolphin’s context menu. Right-click a selection of files, choose KRename, and you are ready to go. The UI follows KDE conventions so it feels native.
The catch
Outside of KDE, KRename pulls in a bunch of KDE dependencies. On a GNOME system, that means downloading 200+ MB of libraries you will not use for anything else. If you are on GNOME or XFCE, GPRename is a lighter choice. If you are on KDE already, KRename is the obvious pick.
Platform: Linux (KDE, but runs on any DE)
Install: apt install krename
Regex: Yes
Plugins: EXIF, translation, checksums, custom JS
License: Free (GPL)
Command-Line Alternatives Worth Knowing
If you prefer the terminal, here are the commands I use most often. They are faster than any GUI tool for straightforward jobs.
Windows PowerShell
Replace text in all filenames in current folder:
Get-ChildItem *.jpg | Rename-Item -NewName { $_.Name -replace 'IMG_','photo_' }Add sequential numbers:
$i=1; Get-ChildItem *.png | Sort-Object Name | ForEach-Object { Rename-Item $_ -NewName ("screenshot-{0:D3}.png" -f $i++)} Mac/Linux Bash
Replace text:
for f in *.jpg; do mv "$f" "${f/IMG_/photo_}"; doneThe Perl-based rename command (installed by default on most Linux distros, available via brew install rename on Mac):
rename 's/IMG_/photo_/' *.jpgI typically use GUI tools when I need a preview of changes before applying them, and command-line tools when the rename pattern is simple and I am confident it will work. The system monitoring tools article covers more useful command-line utilities if you want to explore that side of things.
How I Tested These Tools
Every tool got the same test battery:
- Small batch: 50 files with mixed extensions (.jpg, .png, .pdf, .docx)
- Large batch: 10,000+ files in a single folder
- Special characters: Filenames with spaces, parentheses, unicode characters, and very long names (250+ characters)
- Undo capability: Whether the tool can reverse a rename operation
- Speed: Time from selecting files to completed rename (including preview load time)
I ran all Windows tests on Windows 11 23H2. Mac tests on macOS Sonoma 14.4. Linux tests on Ubuntu 24.04 LTS with GNOME and Kubuntu 24.04 with KDE Plasma 6.
| Tool | 50 files | 10,000 files | Unicode support | Undo |
|---|---|---|---|---|
| Bulk Rename Utility | <1s | 4s | Yes | No (but has preview) |
| PowerRename | <1s | 3s | Yes | Ctrl+Z in Explorer |
| Advanced Renamer | <1s | 6s | Yes | Yes (rename log) |
| Ant Renamer | <1s | 8s | Partial | No |
| NameChanger | <1s | 5s | Yes | Cmd+Z in Finder |
| Finder | <1s | 3s | Yes | Cmd+Z |
| GPRename | <1s | 7s | Yes | No |
| KRename | <1s | 5s | Yes | Yes |
Which One Should You Pick?
This depends entirely on two things: your operating system and how complex your renaming needs are.
Windows + simple renames: Install PowerToys and use PowerRename. Two minutes of setup, and you are covered for 80% of renaming tasks. If you need sequential numbering or metadata-based renaming, grab Advanced Renamer.
Windows + complex or large-scale renames: Bulk Rename Utility. The interface is rough but the power is unmatched in the free tier. I use it for anything over 1,000 files or when I need to chain multiple rename operations together.
Mac: Start with Finder’s built-in rename. If you hit its limits (and you will if you do this regularly), install NameChanger. Between those two, you are covered.
Linux: KRename if you use KDE, GPRename if you use GNOME. Or just use the rename command in terminal – it is probably already installed. If you like managing files visually, check out our list of duplicate file finders for more file management tools.
FAQ
What is the best free batch file renamer for Windows?
Bulk Rename Utility is the best free batch file renamer for Windows. It handles millions of files without slowing down, supports regex, and offers more renaming options than any other free tool. The interface looks intimidating at first, but once you learn it, nothing else comes close.
Can I batch rename files on Mac without installing anything?
Yes. Finder has a built-in batch rename feature. Select multiple files, right-click, and choose Rename. It supports replacing text, adding text, and sequential numbering. For anything more advanced, you will need a tool like NameChanger or Renamer.
Is PowerRename from Microsoft PowerToys safe to use?
Yes, PowerRename is completely safe. It is an official Microsoft tool, part of the open-source PowerToys suite. It integrates directly into the Windows right-click menu and includes a preview pane so you can see exactly what will change before applying.
How do I batch rename files using the command line?
On Windows, use PowerShell: Get-ChildItem *.jpg | Rename-Item -NewName { $_.Name -replace 'old','new' }. On Mac and Linux, use the rename command or a bash loop: for f in *.jpg; do mv "$f" "${f/old/new}"; done. Command-line renaming is fast but has no undo, so test on copies first.
Can batch renamers use EXIF data from photos?
Some can. Advanced Renamer and Bulk Rename Utility both support EXIF metadata tags like date taken, camera model, and GPS coordinates. This is useful for organizing thousands of photos by date or camera. Most simpler tools do not support EXIF renaming.