Base64 Encoding and Decoding: Complete Developer Guide
Master Base64 encoding and decoding with practical examples. Learn when to use it, common pitfalls, and best practices for handling binary data.
Encode or decode URL strings and query parameters using percent-encoding (UTF-8)
This URL Encoder & Decoder converts unsafe characters into percent-encoded form so URLs and query parameters work correctly in browsers, servers, analytics tools, and APIs. It also decodes encoded URLs back into readable text, which is useful for debugging query strings, UTM parameters, redirects, form submissions, and API requests. Encoding prevents issues with spaces, symbols, emojis, and non-English characters.
Paste a URL, query string, or plain text into the input
The tool auto-detects encode vs decode
Click Encode/Decode (or just copy if it updates automatically)
Copy the output and use it in your browser, API call, or tracking link
Encode query parameters safely (spaces, &, =, ?, #)
Decode UTM tracking links to inspect parameters
Fix broken URLs copied from logs or apps
Encode user input for GET requests and redirects
Encode Unicode (Hebrew/Arabic/Chinese) and emojis into valid URLs
Encode and decode in one place
Handles Unicode and emoji safely
Great for query strings and API URLs
One-click copy
Local processing (no uploads)
Learn more about this tool with our in-depth guides
Master Base64 encoding and decoding with practical examples. Learn when to use it, common pitfalls, and best practices for handling binary data.
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