Understanding Percent-Encoding (RFC 3986)
Percent-encoding replaces unsafe ASCII and multibyte UTF-8 characters with a '%' followed by two hexadecimal digits representing the character's byte value in ASCII/UTF-8.
TOOL / DEVELOPER
URL Encoder
Percent-encode URLs and special characters online for safe web transmission.
LOCAL CLIENT-SIDE·ZERO SERVER UPLOAD·MAX 20MB·.txt → .txt
Processed 100% in your browser. Your files are never uploaded to any server.
INPUT95 chars· 95 B
OUTPUT· 123 B
01 / WORKFLOW
How to use / URL Encoder
01
Select Text File
Choose the text file containing the URL or query string.
02
Encode URL
The engine percent-encodes all reserved and non-ASCII characters.
03
Download
Download the encoded URL document.
02 / CAPABILITIES
Key Features & Capabilities
Standard RFC 3986 percent-encoding
Escapes reserved query characters, spaces, and Unicode glyphs
Safe for query string parameters and API endpoints
100% client-side execution
03 / FORMAT
Supported Formats
Input Formats
.txt
Output Format
.txt04 / REFERENCE
About this tool
05 / FAQ
Frequently Asked Questions
Everything you need to know about using this tool. URL Encoder.
Why is URL encoding necessary?
URLs can only be sent over the Internet using the ASCII character-set. URL encoding converts non-ASCII and reserved characters (like spaces, &, ?, =) into % followed by hexadecimal digits.
What is the difference between encodeURI and encodeURIComponent?
encodeURI preserves URL protocol and domain structure (like https://), whereas encodeURIComponent encodes all special characters, making it ideal for query string values.
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