String Length Calculator - Count Characters Online

Calculate string length, character count, and byte size instantly. Perfect for checking text limits in forms, databases, and APIs.

Input Text

String Analysis

Character Count

Byte Size (UTF-8)

Additional Statistics

Words (approx):0

Lines:0

Without spaces:0

API Documentation

Request Format:

{
  "text": "Your text string here"
}

Response Format:

// Success Response
{
  "ok": true,
  "length": 20,
  "bytes": 20,
  "words": 4,
  "lines": 1,
  "withoutSpaces": 17
}

// Error Response
{
  "ok": false,
  "error": "Invalid request format"
}

What is String Length?

String length refers to the number of characters in a text string. This includes letters, numbers, spaces, punctuation, and special characters. Understanding string length is crucial for database design, form validation, and text processing.

The byte size of a string can differ from its character count, especially when using Unicode characters. Our tool calculates both metrics to give you a complete picture of your text data.

Key Features

Real-time counting: See results instantly as you type
Character count: Exact number of characters including spaces
Byte size: UTF-8 encoded size for database storage
Word count: Approximate word count for content analysis
Line count: Number of lines in multi-line text
API access: Integrate string length calculation into your apps

Common Use Cases

Database Design

Determine appropriate field sizes for VARCHAR columns and ensure data fits within constraints.

Form Validation

Check if user input meets minimum and maximum length requirements before submission.

Social Media

Ensure posts fit within character limits for Twitter, SMS, or other platforms.

SEO Optimization

Check meta descriptions and title tags stay within recommended character limits.

Understanding Character vs Byte Count

Character Count

Character count represents the number of individual characters in your text, regardless of how they're encoded. This includes:

Letters (A-Z, a-z)
Numbers (0-9)
Spaces and tabs
Punctuation marks
Special characters
Emojis and Unicode symbols

Byte Size

Byte size represents the actual storage space required when the text is encoded in UTF-8:

ASCII characters: 1 byte each
Extended Latin: 2 bytes each
Common symbols: 2-3 bytes each
Asian characters: 3 bytes each
Emojis: 4 bytes each

Why Use Our String Length Calculator?

Our string length calculator provides comprehensive text analysis in real-time. Unlike basic tools, we calculate both character count and byte size, giving you the complete information needed for database design and text validation.

The tool runs entirely in your browser, ensuring privacy and instant results. Whether you're designing database schemas, validating form inputs, or checking social media post limits, our calculator helps you make informed decisions about text data.