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URL Encoder / Decoder

Encode text into URL-safe percent-encoded format or decode percent-encoded strings back into readable text. Everything runs locally in your browser for complete privacy.

Full URL encoding

Off uses encodeURIComponent(), which escapes every reserved character. On uses encodeURI(), which preserves URI structure characters like / ? & #.

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About the URL Encoder / Decoder

This URL encoder decoder online tool converts text to and from percent-encoded format so it can travel safely inside a URL, query string, or form submission. Percent encoding replaces unsafe or reserved characters, such as spaces, ampersands, and slashes, with a percent sign followed by two hexadecimal digits, keeping the URL valid across every browser and server.

The tool supports both a strict URI component encoder for individual query values and a full URI encoder that preserves structural characters in a complete address. All processing happens locally using your browser's native Web APIs, so nothing you type or upload is ever sent to a server.

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How to Use

  1. Choose Encode to escape special characters, or Decode to convert a percent-encoded string back to text.
  2. Select Text Input and paste your value, or switch to File Input to upload a text file.
  3. When encoding, toggle Full URL Encoding if you need to preserve URI structure characters like slashes and question marks.
  4. Copy or download the result once it appears in the Output box.

Why Use This Tool

Accurate Percent Encoding

Uses the browser's native encodeURI and encodeURIComponent functions, so output matches exactly what your application would produce.

Automatic Decode Detection

Automatically tries full and component decoding, so partially or fully encoded strings both resolve without extra configuration.

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Who Should Use This

  • Frontend developers encoding query parameters before building fetch or API request URLs.
  • Backend engineers debugging incoming requests that contain percent-encoded path segments.
  • QA engineers verifying that encoded form data decodes back to the expected value.
  • Technical writers generating readable examples from encoded API documentation samples.

Privacy First

Every encode and decode operation runs directly inside your browser using standard JavaScript Web APIs. No text or file you enter is ever uploaded, logged, or transmitted to any server, making this tool safe for API keys, tokens, and other sensitive query data.

A URL encoder decoder converts text to and from percent-encoded format so it can travel safely inside a URL. Encoding replaces unsafe characters such as spaces, ampersands, and slashes with a percent sign followed by two hex digits, and decoding reverses the process back to readable text.
Paste the raw parameter value into the input box, choose Encode, and the tool applies encodeURIComponent so every reserved character in the value is escaped. This is the safest option for query string values, form fields, and path segments that must not be interpreted as URL structure.
Percent encoding is the standard way to represent unsafe or reserved ASCII and non-ASCII characters inside a URI using a percent sign and two hexadecimal digits. It is required whenever a URL contains spaces, special symbols, or international characters that would otherwise break parsing.
A URI component encoder escapes every character outside the unreserved set, including slashes, question marks, and ampersands, making it correct for individual query values. Full URI encoding leaves those structural characters untouched so an entire URL keeps working as a single address.
Yes, this tool decodes any percent-encoded string for free directly in your browser with no signup or software install. It automatically tries full URI decoding first and falls back to component decoding so malformed or partially encoded strings still resolve correctly.