Ultimate URL Encoder
Professional URL encoder with query parameter editor, URL parser, visual diff, and advanced features
The Ultimate URL Encoder is a professional-grade tool for encoding and decoding URLs with multiple encoding formats. It supports URI Component encoding (recommended for query parameters and path segments), standard URI encoding (for complete URLs), form data encoding (using + for spaces), and Base64 URL-safe encoding (for data transmission). The tool automatically handles multiple encoding depths, making it easy to decode URLs that have been encoded multiple times.
Advanced features include a URL parser that breaks down URLs into their component parts (protocol, hostname, port, pathname, query string, hash), a query string builder for constructing URLs with multiple parameters, and a visual diff view that highlights exactly what changed during encoding. The parser extracts and displays query parameters in a table format with individual copy buttons, making it easy to work with complex URLs. Statistics show character counts, encoded character counts, and size ratios to help you understand the impact of encoding.
Whether you're building API requests, debugging URL issues, constructing query strings, or learning about URL encoding, this tool provides everything you need. The swap input/output feature makes it easy to chain operations, and all processing happens locally in your browser for complete privacy. Perfect for web developers, API developers, and anyone working with URLs and query parameters.
Four Encoding Formats
URI Component, standard URI, form data, and Base64 URL-safe encoding for all use cases.
URL Parser
Break down URLs into protocol, hostname, port, pathname, query string, and hash with copy buttons.
Query String Builder
Build query strings by adding key-value pairs with automatic encoding and formatting.
Multiple Decode Depths
Decode URLs that have been encoded multiple times (1x, 2x, 3x, or 4x) automatically.
Visual Diff View
See exactly what changed with color-coded highlighting for encoded characters.
Query Parameter Table
View all query parameters in a table with keys, values, and individual copy buttons.
Statistics Dashboard
See character counts, encoded characters, special characters, and query parameter counts.
Bidirectional Conversion
Encode plain text to URLs or decode URLs back to plain text with one click.
Swap Input/Output
Instantly swap input and output to chain operations or reverse the conversion.
Copy Everywhere
Copy entire URLs, individual parts, query parameters, or values with one click.
Real-Time Conversion
See results instantly as you type with automatic encoding/decoding.
Privacy First
All processing happens in your browser - your URLs never leave your device.