Encoders & Decoders - Free Online Tools
Encode and decode data between different formats. Base64, Base32, URL encoding, HTML entities, hex to ASCII, and Unicode conversions. Essential tools for working with web APIs, data transmission, and character encoding.
All encoding and decoding happens locally in your browser. Your data never gets uploaded or logged anywhere.
Available Tools
Base64 Encoder/Decoder
Encode text or files to Base64, or decode Base64 strings back to their original form. Supports both text input and file uploads for maximum flexibility.
Base32 Encoder/Decoder
Encode and decode Base32 strings. Supports RFC 4648, RFC 4648 Hex, and Crockford variants with padding options.
URL Encoder/Decoder
Encode special characters for safe URL usage or decode URL-encoded strings. Essential for working with query parameters and URI components.
HTML Entity Encoder/Decoder
Encode special characters to HTML entities or decode entities to characters. Supports named, numeric, and hex entity formats.
Hex ↔ ASCII Converter
Convert between hexadecimal and ASCII text. Supports multiple input/output formats with spacing options.
Why Use Encoding Tools?
Web APIs and data transmission often require specific encoding formats. Base64 encoding lets you transmit binary data as text. URL encoding ensures special characters don't break links. HTML entity encoding prevents XSS attacks and displays characters correctly.
These tools help you debug encoding issues, prepare data for transmission, and understand what's actually in your encoded strings. When an API returns Base64 data, you can decode it instantly to see what it contains. When you need to encode an image for a data URL, you can do it without writing code.
Encoding problems are frustrating to debug. These tools give you immediate visibility into what your data looks like in different formats.
Common Use Cases
- • Encoding binary data as Base64 for API transmission
- • Decoding Base64 strings from API responses to inspect content
- • URL-encoding parameters with special characters for safe links
- • Converting HTML entities to display special characters correctly
- • Debugging hex-encoded data in network packets or files
- • Converting Unicode characters for internationalization work
- • Encoding images as Base64 for CSS data URLs
- • Decoding Base32 tokens or identifiers
- • Preventing XSS by HTML-encoding user input
Related Categories: Converters | Security & Hashing | Developer Utilities