URL Percent Encoder & Decoder for Query Strings
Sanitize URLs and query parameters with RFC 3986 percent-encoding and decoding.
URL Percent Encoder & Decoder
Live workstation with automatic local history
Recent URL Percent Encoder & Decoder History
0 runsHow to use the URL Percent Encoder & Decoder
Follow these four simple steps for instant, production-grade results.
Enter your raw URL or encoded query parameter string into the input area.
Click "Encode" to replace reserved symbols with safe %XX hex representations.
Or click "Decode" to inspect human-readable URLs from obfuscated tracking links.
Click "Copy" to save the result.
Key Features Built for Professional Workflows
Adheres to RFC 3986 Uniform Resource Identifier specifications
Converts spaces (%20), ampersands (%26), slashes (%2F), and reserved characters accurately
Bidirectional Encode and Decode workflows with single-click clipboard copy
Large input area for analyzing long tracking links, UTM parameters, and redirect chains
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Open Base64 Encoder & Decoder →Why Digital Agencies & Developers Rely on This Tool
Standardize deliverables, accelerate sprint velocity, and maintain client privacy.
Preparing complex deep-link redirect URLs for marketing automation workflows.
Debugging third-party webhook query strings and OAuth callback parameters.
Encoding JSON strings for safe transmission inside URL query parameters.
Inspecting and validating UTM campaign parameters across marketing agency ad links.
Technical Specifications & Standards
Utilizes encodeURIComponent() and decodeURIComponent() adhering to RFC 3986 standards. Encodes all characters except: A-Z a-z 0-9 - _ . ! ~ * ' ( ).
Frequently Asked Questions
What is the difference between percent encoding and Base64?
Percent-encoding (%20, %2F) is specifically designed for URLs so that web servers and browsers parse parameter keys and values without conflicting with delimiter tokens like & or =. Base64 is a binary-to-text representation format not directly URI-safe without replacement of + and / characters.
Why are spaces encoded as %20 instead of +?
According to modern RFC 3986 specifications, %20 is the official percent-encoding for a space character across all URI components. While old application/x-www-form-urlencoded forms used +, %20 is universally supported across APIs and modern web frameworks.
Does this decode nested or double-encoded URLs?
If a URL has been double-encoded (%2520), running the Decode operation once will reveal the first layer (%20), and running it again will reveal the raw space character.
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