🔐 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

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, and data into Base64 format for safe transmission and storage.

Text & file encoding
UTF-8 support
Bulk processing
Download results

Most Used Encode Base64 →

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Base64 Decoder

Decode Base64 encoded data back to its original format safely and accurately.

Safe decoding
Format validation
Error detection
Multiple outputs

Essential Decode Base64 →

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URL Encoder

Encode URLs and query parameters for safe web transmission and API calls.

RFC 3986 compliant
Query string encoding
Special char handling
Bulk URL processing

Web Dev Encode URL →

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URL Decoder

Decode URL-encoded strings and query parameters back to readable format.

Percent decoding
UTF-8 support
Query parsing
Validation checks

Web Dev Decode URL →

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HTML Encoder

Convert special characters to HTML entities for safe display in web pages.

Entity conversion
XSS prevention
Unicode support
Custom encoding

Security Encode HTML →

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HTML Decoder

Decode HTML entities back to readable text and special characters.

Entity decoding
Named & numeric
Batch processing
Format preservation

Parsing Decode HTML →

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Binary to Text

Convert binary data (0s and 1s) to readable text using ASCII encoding.

ASCII conversion
UTF-8 support
Error handling
Format validation

Binary Convert Binary →

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Text to Binary

Convert text and characters to binary representation (8-bit ASCII).

8-bit encoding
Unicode support
Formatting options
Copy to clipboard

Binary Convert Text →

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Hex to Text

Convert hexadecimal values to readable text using ASCII character mapping.

Hex decoding
ASCII mapping
Space handling
Error detection

Hex Convert Hex →

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Text to Hex

Convert text to hexadecimal representation for low-level programming.

Hex encoding
Uppercase/lowercase
Delimiter options
Bulk conversion

Hex Convert Text →

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ASCII to Text

Convert ASCII codes (decimal numbers) to readable text characters.

ASCII decoding
Decimal input
Character mapping
Validation checks

ASCII Convert ASCII →

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Text to ASCII

Convert text characters to their corresponding ASCII decimal codes.

ASCII encoding
Decimal output
Character codes
Format options

ASCII Convert Text →

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" → "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 → %20 @ → %40 # → %23 & → %26

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HTML Entity Encoding

HTML entities prevent XSS attacks and display special characters correctly.

< → < > → > & → & " → "

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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.

• Validate input format before decoding • Sanitize output for display • Use proper encoding for context • 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.

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

Frequently Asked Questions

Common questions about encoding, decoding, and data format conversion.

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.

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.

Yes, URL encoding is essential for query parameters containing spaces, special characters, or non-ASCII characters. It ensures proper parsing and prevents broken URLs.

HTML encoding converts potentially dangerous characters like <, >, and & into safe entities (<, >, &), preventing malicious scripts from executing in browsers.

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).

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.

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.

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.