Non-Alphanumeric Cleaner

Non-Alphanumeric Cleaner | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Text Processing
Input types: textarea, checkbox, text
Output type: text
Sample coverage: 4
API ready: Yes

Overview

The Non-Alphanumeric Cleaner is a text processing tool that removes all special characters, leaving only letters and numbers. It provides flexible options to preserve common punctuation, spaces, Chinese characters, or any custom characters you specify, making it ideal for sanitizing and preparing text.

When to use

When sanitizing user input to remove unwanted special characters for data consistency or security.
To prepare text for URLs, filenames, or systems that require alphanumeric-only content.
When cleaning up text data for analysis or processing by stripping formatting symbols.

How it works

1Enter or paste your text into the input field.
2Select preservation options: keep common punctuation, spaces, Chinese characters, or add custom characters.
3The tool processes the text and outputs a cleaned version with only the allowed characters.

Use cases

Cleaning user-submitted form data to prevent encoding issues or security risks.
Generating clean slugs for web pages by removing special characters from titles.
Preparing text for machine learning models that require alphanumeric input only.

Examples

1. Sanitizing User Comments for Database Storage

Web Developer

Background

A website collects user comments that often include emojis and special symbols, which can cause database errors.

Problem

Need to remove special characters while preserving readability for storage.

How to use

Paste the comment into the text input, enable 'Preserve Spaces and Newlines' to maintain structure, and disable other options.

preserveSpaces: true, preservePunctuation: false, preserveChinese: false, customPreserve: ''

Outcome

The comment is cleaned to contain only letters, numbers, and spaces, ensuring safe database storage.

2. Creating URL Slugs from Article Titles

Content Manager

Background

Article titles contain punctuation and symbols that are invalid in URLs.

Problem

Convert titles into alphanumeric slugs for web addresses.

How to use

Input the title, disable all preservation options to remove everything except letters and numbers.

FAQ

What characters are removed by default?

All non-alphanumeric characters are removed, including symbols like @, #, $, %, &, *, leaving only letters and numbers.

Can I preserve specific punctuation marks?

Yes, enable 'Preserve Common Punctuation' to keep .,!?;:()[]{}"'.

Does it support non-English characters?

Yes, you can preserve Chinese characters by enabling the 'Preserve Chinese Characters' option.

How do I keep characters not listed in the options?

Use the 'Custom Characters to Preserve' field to add any additional characters you want to retain.

Is the tool case-sensitive for letters?

No, it treats both uppercase and lowercase letters as alphanumeric and preserves them by default.

preservePunctuation: false, preserveSpaces: false, preserveChinese: false, customPreserve: ''

Run this tool

Inputs

Result

Examples that match this tool

Continue with connected tools and hubs

Inputs

Result

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Sanitizing User Comments for Database Storage

2. Creating URL Slugs from Article Titles

FAQ

Special Characters Samples

Duplicate Line Samples

Android File Operations Java Samples

Android File Operations Kotlin Samples

Empty Line Remover

Line Number Remover

Prefix Remover

Suffix Remover

Unicode, Emoji, and Invisible Character Debugging Tools

Text Case, Encoding, and Normalization Conversion Tools

Text Tools

Text Analysis, Readability, and Content Inspection Tools