URL Encoder / Decoder

Client-Side New

Encode special characters in URLs and query parameters, or decode URL-encoded strings back to readable text. Supports both encodeURIComponent (for individual parameters) and encodeURI (for full URLs). Essential for debugging API calls, building query strings, and handling URL-encoded form data.

Mode:

Text to Encode0 chars

About URL Encoder

encodeURIComponent — Encodes all special characters including : / ? # @ etc. Best for query parameters.
encodeURI — Preserves URL structure characters (: / ? # @). Best for encoding full URLs.
All processing happens locally in your browser — nothing is sent to any server

How to Use

1

Choose Mode

Select Encode to URL-encode text or Decode to convert percent-encoded strings back to readable text.
2

Select Encoding Type

Choose encodeURIComponent for query parameters or encodeURI for full URLs.
3

Process and Copy

Click the action button and copy the result to your clipboard.

Examples by Niche

Query Parameters

Encode "hello world & goodbye" to "hello%20world%20%26%20goodbye" for use in URL query strings

API Debugging

Decode "%7B%22key%22%3A%22value%22%7D" back to {"key":"value"} when debugging API responses

Form Data

Encode special characters in form field values before submitting as application/x-www-form-urlencoded

Frequently Asked Questions

What is the difference between encodeURI and encodeURIComponent?

encodeURI preserves URL structure characters like : / ? # @ and is used for encoding full URLs. encodeURIComponent encodes all special characters and is used for encoding individual query parameter values.

When should I URL-encode my data?

You should URL-encode data when including it in query strings, form submissions (application/x-www-form-urlencoded), or anywhere special characters like & = ? might conflict with URL syntax.

Is my data safe when using this tool?

Yes, all encoding and decoding happens entirely in your browser. No data is ever sent to any server.

What is percent-encoding and how does it relate to URL encoding?

Percent-encoding is the official name for URL encoding (defined in RFC 3986). Each unsafe character is replaced with a percent sign followed by its two-digit hexadecimal ASCII value. For example, a space becomes %20 and an ampersand becomes %26.

What is URL encoding?

URL encoding replaces unsafe ASCII characters with % followed by hex codes.

Why URL encode?

To ensure URLs are transmitted safely and characters like spaces and symbols are not misinterpreted.

Which characters need encoding?

Spaces, special characters (#@!$), and non-ASCII characters need URL encoding.

Is there a difference between encodeURI and encodeURIComponent?

encodeURI preserves URL structure. encodeURIComponent encodes everything including slashes and colons.

Does URL encoding affect SEO?

Yes. Clean, readable URLs perform better. Over-encoding can hurt click-through rates.

What is double URL encoding?

Encoding an already-encoded string, which often causes errors and should be avoided.

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