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All ToolsEncode / Decode URL
Encode / Decode URL
URL encode or decode strings. Convert special characters to percent-encoded format and back.
What is Encode / Decode URL?
Encode/Decode URL is a free online tool that percent-encodes special characters for safe use in URLs or decodes percent-encoded strings back to readable text. Essential for web developers working with query strings, API parameters, or URIs.
How It Works
URL encoding uses encodeURIComponent() which converts characters like spaces, ampersands, and non-ASCII characters to percent-encoded format (e.g. space → %20). Decoding uses decodeURIComponent() to reverse the process.
How to Use
- 1
Paste your URL or string
Enter the URL or text string you need to encode or decode in the input field.
- 2
Encode or decode
Click "Encode URL" to percent-encode special characters, or "Decode URL" to convert encoded sequences back to readable text.
- 3
Copy the result
Copy the output for use in web development, API calls, or browser address bars.
Who Uses This Tool
🔗
Query String Parameters
Encode user-supplied search terms or filter values before appending them as URL query parameters.
🛠️
API Request Construction
Percent-encode parameter values when building API request URLs programmatically to prevent injection issues.
🌍
Internationalized URLs
Encode non-ASCII characters like accented letters or CJK characters so they are safe to use in URLs.
🔍
Debugging Encoded URLs
Decode obfuscated or percent-encoded URLs from logs or redirects to read the original destination.
📧
Mailto Link Parameters
Encode subject and body text for mailto: links to ensure special characters render correctly in email clients.
📦
Redirect URL Encoding
Encode return_url or redirect parameters that contain slashes and question marks to keep the parent URL valid.
Why Choose This Tool
encodeURIComponent Accuracy
Uses JavaScript's encodeURIComponent which encodes all unsafe characters correctly for query parameter values.
Decode Mode Included
Decode any percent-encoded string back to readable text with a single button, covering both encode and decode workflows.
Malformed Sequence Detection
Shows a clear error when decoding an invalid percent-encoded sequence rather than returning corrupted output.
Unicode Handling
Correctly encodes multi-byte Unicode characters to their full percent-encoded form per the URI specification.
Instant Results
Encoding and decoding run synchronously in the browser so output appears immediately without any delay.
No Upload Required
All processing is client-side so you can safely encode sensitive query parameters and tokens offline.
Also Try
Key Benefits
- Encodes all special characters for safe URL use
- Decodes percent-encoded strings back to readable text
- Handles Unicode characters correctly
- Shows error for malformed percent-encoded sequences
- One-click copy output button
Frequently Asked Questions
Also Known As
url encoder decoder online freepercent encode url onlineurl decode online toolencode url special characters onlineurl encoding converter browserdecode percent encoded urlonline url encoder no installurl encode decode tool free
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