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๐Ÿ” Encoding & Decoding Tools

Essential encoding and decoding tools for developers and data analysts. Convert between different data formats securely with Base64, URL, HTML, Binary, Hex, ASCII and more professional-grade converters.

12 Tools
Secure Processing
Instant Results
Free Always
Category Rating
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4.7 / 5
243 total ratings across all tools

Professional Encoding & Decoding Tools

Secure and reliable data format conversion tools for developers, analysts, and data professionals.

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Base64 Encoder

Encode text, files, or data to Base64 format safely

  • Text & file encoding
  • UTF-8 support
  • Bulk processing
  • Download results
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4.8 (31 votes)
Most Used Encode Base64 โ†’
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Base64 Decoder

Decode Base64 encoded data back to original format

  • Safe decoding
  • Format validation
  • Error detection
  • Multiple outputs
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4.8 (28 votes)
Essential Decode Base64 โ†’
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URL Encoder

Encode URLs and special characters for web safety

  • RFC 3986 compliant
  • Query string encoding
  • Special char handling
  • Bulk URL processing
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4.7 (28 votes)
Web Dev Encode URL โ†’
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URL Decoder

Decode URL-encoded strings and parameters

  • Percent decoding
  • UTF-8 support
  • Query parsing
  • Validation checks
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4.7 (25 votes)
Web Dev Decode URL โ†’
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HTML Encoder

Encode HTML entities and special characters

  • Entity conversion
  • XSS prevention
  • Unicode support
  • Custom encoding
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4.6 (22 votes)
Security Encode HTML โ†’
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HTML Decoder

Decode HTML entities back to readable text

  • Entity decoding
  • Named & numeric
  • Batch processing
  • Format preservation
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4.7 (24 votes)
Parsing Decode HTML โ†’
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Binary to Text

Convert binary code to readable text format

  • ASCII conversion
  • UTF-8 support
  • Error handling
  • Format validation
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4.6 (14 votes)
Binary Convert Binary โ†’
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Text to Binary

Convert text to binary representation

  • 8-bit encoding
  • Unicode support
  • Formatting options
  • Copy to clipboard
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4.7 (12 votes)
Binary Convert Text โ†’
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Hex to Text

Convert hexadecimal values to text

  • Hex decoding
  • ASCII mapping
  • Space handling
  • Error detection
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4.7 (20 votes)
Hex Convert Hex โ†’
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Text to Hex

Convert text to hexadecimal format

  • Hex encoding
  • Uppercase/lowercase
  • Delimiter options
  • Bulk conversion
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4.6 (17 votes)
Hex Convert Text โ†’
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ASCII to Text

Convert ASCII codes to readable text

  • ASCII decoding
  • Decimal input
  • Character mapping
  • Validation checks
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4.6 (10 votes)
ASCII Convert ASCII โ†’
โŒจ๏ธ

Text to ASCII

Convert text to ASCII code values

  • ASCII encoding
  • Decimal output
  • Character codes
  • Format options
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4.7 (12 votes)
ASCII Convert Text โ†’

Encoding & Decoding Guide

Master data encoding with these essential techniques and best practices.

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Base64 Encoding Basics

Base64 encoding converts binary data to ASCII text for safe transmission over text-based protocols.

Example: "Hello World" โ†’ "SGVsbG8gV29ybGQ=" Use case: Email attachments, data URLs, API tokens
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URL Encoding Rules

URL encoding replaces unsafe ASCII characters with % followed by hex digits.

Space โ†’ %20 @ โ†’ %40 # โ†’ %23 & โ†’ %26
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HTML Entity Encoding

HTML entities prevent XSS attacks and display special characters correctly.

< โ†’ < > โ†’ > & โ†’ & " โ†’ "
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Binary & Hex Conversion

Binary uses 0s and 1s, hex uses 0-9 and A-F for compact representation.

'A' = 65 (ASCII) = 01000001 (Binary) = 41 (Hex) '0' = 48 (ASCII) = 00110000 (Binary) = 30 (Hex)
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Security Best Practices

Always validate and sanitize decoded data to prevent injection attacks.

โ€ข Validate input format before decoding โ€ข Sanitize output for display โ€ข Use proper encoding for context โ€ข Never trust user-provided encoded data
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Performance Optimization

Choose the right encoding method for your specific use case and data size.

โ€ข Base64: 33% size increase โ€ข URL encoding: Variable increase โ€ข Hex: 100% size increase โ€ข Use streaming for large files

Frequently Asked Questions

What is the difference between encoding and encryption? +
Encoding transforms data for safe transmission (like Base64), while encryption secures data with keys. Encoding is reversible without keys, encryption requires the correct key to decrypt.
When should I use Base64 encoding? +
Use Base64 for transmitting binary data over text protocols (email, JSON, URLs), embedding images in CSS/HTML, storing binary data in databases that expect text, and API authentication tokens.
Is URL encoding necessary for all URL parameters? +
Yes, URL encoding is essential for query parameters containing spaces, special characters, or non-ASCII characters. It ensures proper parsing and prevents broken URLs.
How does HTML entity encoding prevent XSS attacks? +
HTML encoding converts potentially dangerous characters like <, >, and & into safe entities (&lt;, &gt;, &amp;), preventing malicious scripts from executing in browsers.
What's the difference between ASCII and UTF-8 encoding? +
ASCII uses 7 bits for 128 characters (English only), while UTF-8 is backward-compatible with ASCII but supports all Unicode characters using variable-length encoding (1-4 bytes).
Are these encoding tools secure for sensitive data? +
Our tools process data client-side for security, but encoding is not encryption. Never use these tools for passwords or sensitive data that needs protection - use proper encryption instead.
Can I batch process multiple files or strings? +
Yes, most of our encoding tools support bulk processing. You can encode/decode multiple strings at once or process entire files depending on the specific tool.
Why might my Base64 decoded data look corrupted? +
Common causes include: incorrect padding, line breaks in input, wrong character encoding assumption, or the original data was compressed/binary. Verify the source format and encoding method.
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200+ Forever Free Tools

Complete collection of converter tools, generators, and utilities. All completely free to use without registration, forever.

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Fast & Browser-Based

Lightning-fast processing that currently happens in your browser. Most tools work offline and your data stays on your device.

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Mobile Optimized

All tools work perfectly on mobile phones, tablets, and desktop computers with responsive design and intuitive interfaces.

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Privacy Committed

Current browser-based processing means your files never leave your device. Ad-supported for sustainability, transparent about practices.

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