URL Encoder & Decoder
Encode and decode URLs, query parameters, and URIs online. Safely format special characters, spaces, and non-ASCII symbols with 100% client-side privacy.
How URL Encoder & Decoder Works & Technical Principles
Encode and decode URL query strings and URI components in real time. Safely format special characters, spaces, and UTF-8 symbols with zero server logging.
Technical Overview: RFC 3986 Percent-Encoding & Character Escaping
URLs may only be sent over the Internet using the standard ASCII character set. Percent-encoding (URL encoding) replaces unsafe, reserved, or non-ASCII characters with a '%' symbol followed by two hexadecimal digits representing the UTF-8 byte value (e.g., a space becomes %20).
Input & Configuration
Paste your raw text, query parameter string, or percent-encoded URL into the input field.
Client-Side Processing
The browser uses native encodeURIComponent / decodeURIComponent methods to transform character sequences.
Instant Output & Export
View the converted result instantly, toggle between Encode and Decode modes, and copy to your clipboard.
Key Capabilities & Features
Bidirectional Encoding & Decoding
Effortlessly convert raw text to percent-encoded strings or decode encoded strings back to plaintext.
Full UTF-8 & Emoji Support
Correctly handles multi-byte UTF-8 sequences, foreign alphabets, and emojis without corruption.
100% In-Browser Privacy Guarantee
Authentication callback URLs, OAuth tokens, and tracking links are parsed safely without remote logging.
One-Click Output Copying
Quickly copy sanitized URL components ready to paste into HTTP clients, API routes, or browser address bars.
Standard IETF specification for URI generic syntax and percent-encoding algorithms
Modern standard specification for web browser URL parsing and query string serialization