Are NanoTools completely free to use?

Yes, all basic tools on NanoTools are completely free to use with no registration required. We offer premium features for power users.

Is my data secure when using NanoTools?

Your files are processed securely and are automatically deleted after processing. We do not store your files or data on our servers.

Do I need to install any software to use NanoTools?

No installation required. All tools work directly in your browser on any device - computer, tablet, or smartphone.

What file formats are supported?

We support a wide range of formats including PDF, JPG, PNG, WebP, GIF, JSON, XML, CSV, and many more depending on the tool.

NanoTools

Back to Tools

Bulk File Renamer - Rename Multiple Files

Rename files in bulk online for free. Batch rename multiple files with patterns. Sequence numbering.

Bulk File Rename Tool

Rename multiple files using pattern matching

Select Files

Rename Pattern

Find

Replace With

Use regular expressions

How to Use

1. Select multiple files using the file input

2. Enter the text pattern you want to find in filenames

3. Enter what you want to replace it with

4. Review the preview to see how files will be renamed

5. Download the shell script to execute the renames

Note: This tool generates a rename script for you to review and execute manually. Always review the script before running it.

Pattern Examples

Find: IMG_ → Replace: Photo_

Simple text replacement

Find: ^(.+)\\.txt$ → Replace: $1.md (Regex)

Change file extension from .txt to .md

Find: \\s+ → Replace: _ (Regex)

Replace spaces with underscores

What This Tool Does

Preview bulk file renames
Simple text find and replace
Regular expression support
Generate shell scripts for execution
Safe preview before renaming

How to Use

1
Select files
Choose files to rename
2
Set pattern
Define find/replace pattern
3
Preview
Review changes before applying
4
Download script
Get shell script to execute renames

How it works

Select files

Choose files to rename

Set pattern

Define find/replace pattern

Preview

Review changes before applying

Download script

Get shell script to execute renames

Use Cases

Organizing photo libraries
Cleaning up filenames
Batch file organization
Removing special characters
Standardizing naming conventions

Frequently Asked Questions

Does it rename files directly?

No, it generates a shell script for you to review and execute manually. This ensures safety.

Can I use regex patterns?

Yes, enable regex mode to use advanced patterns like changing file extensions or complex replacements.

What if I make a mistake?

Since it generates a script, you can review all changes before executing. No files are modified until you run the script.

How do I use the generated script?

Download the .sh file, review it, then run with bash rename-script.sh in the target directory.

Back to Tools

Bulk File Renamer - Rename Multiple Files

Rename files in bulk online for free. Batch rename multiple files with patterns. Sequence numbering.

Bulk File Rename Tool

Rename multiple files using pattern matching

Select Files

Rename Pattern

Find

Replace With

Use regular expressions

How to Use

1. Select multiple files using the file input

2. Enter the text pattern you want to find in filenames

3. Enter what you want to replace it with

4. Review the preview to see how files will be renamed

5. Download the shell script to execute the renames

Note: This tool generates a rename script for you to review and execute manually. Always review the script before running it.

Pattern Examples

Find: IMG_ → Replace: Photo_

Simple text replacement

Find: ^(.+)\\.txt$ → Replace: $1.md (Regex)

Change file extension from .txt to .md

Find: \\s+ → Replace: _ (Regex)

Replace spaces with underscores

What This Tool Does

Preview bulk file renames
Simple text find and replace
Regular expression support
Generate shell scripts for execution
Safe preview before renaming

How to Use

1
Select files
Choose files to rename
2
Set pattern
Define find/replace pattern
3
Preview
Review changes before applying
4
Download script
Get shell script to execute renames

How it works

Select files

Choose files to rename

Set pattern

Define find/replace pattern

Preview

Review changes before applying

Download script

Get shell script to execute renames

Use Cases

Organizing photo libraries
Cleaning up filenames
Batch file organization
Removing special characters
Standardizing naming conventions

Frequently Asked Questions

Does it rename files directly?

No, it generates a shell script for you to review and execute manually. This ensures safety.

Can I use regex patterns?

Yes, enable regex mode to use advanced patterns like changing file extensions or complex replacements.

What if I make a mistake?

Since it generates a script, you can review all changes before executing. No files are modified until you run the script.

How do I use the generated script?

Download the .sh file, review it, then run with bash rename-script.sh in the target directory.