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URL Encoder / Decoder

Encode and decode URLs and query parameters with component-level control.

Encode as:

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Input (Plain Text)
Output (Encoded)

Enter text to see encoded output…

Encoding Types

encodeURI

Encodes a full URL. Preserves: A-Z a-z 0-9 ; , / ? : @ & = + $ - _ . ! ~ * ' ( ) #

encodeURIComponent

Encodes a URL component. Encodes everything except: A-Z a-z 0-9 - _ . ! ~ * ' ( )

URL Structure

Parses the URL and selectively encodes different parts: path, query parameters, and fragment.

Component Display

When decoding, shows individual URL components (protocol, host, path, query, hash) separately.

All encoding/decoding happens locally in your browser. No data is sent to any server.

How Url Encoder Works in Your Browser

The ToolsForgess URL encoder and decoder converts URLs and URL components between readable and percent-encoded formats using the browser's native encodeURIComponent and decodeURIComponent APIs. Paste a URL or URL fragment, select full URL or component encoding, and receive the converted output instantly. The encoder handles spaces, special characters, Unicode code points, and reserved characters according to RFC 3986 specifications — all without transmitting any data to a server. This tool is essential for developers constructing query strings with special character values, debugging redirect URLs with encoded parameters, preparing URLs for HTTP request construction, and testing URL decoding in web application security contexts.

Key Features

  • Encode complete URLs or individual URL components including query parameters, path segments, and fragment identifiers. Each mode applies the correct encoding rules.
  • Handle Unicode characters, spaces, and all RFC 3986 reserved characters with correct percent-encoding sequences.
  • Bidirectional conversion — paste encoded or decoded text and the tool detects the input format for reverse transformation.
  • All encoding and decoding occur entirely within the browser using native APIs. No URL data is transmitted to any server.

Frequently Asked Questions

What is the difference between encodeURI and encodeURIComponent?
encodeURI preserves URL structure characters like slashes, colons, and question marks. encodeURIComponent encodes all special characters except alphanumerics and hyphens, underscores, periods, and asterisks. Use encodeURIComponent for individual parameter values.
Does it handle plus signs for spaces?
The standard URL encoding uses percent twenty for spaces. Plus-sign encoding is form-specific and used in application/x-www-form-urlencoded. The tool uses percent encoding by default.
Can I decode double-encoded URLs?
Apply the decode function multiple times to reverse double or triple encoding. Each application removes one layer of percent-encoding.
Is my URL data transmitted during encoding?
No. All encoding and decoding occur entirely within the browser. Your URL data never leaves your device.

All data processing for Url Encoder runs 100% locally in your browser using client-side JavaScript. No data is uploaded to any server.

Technical Specification

URL Encoding & Decoding Engine for Web Data Serialization

Overview

The ToolsForges URL encoder-decoder performs bi-directional percent-encoding and decoding of URL strings, query parameters, and form data entirely within the browser. Paste your URL or query string to receive properly encoded output with special characters, spaces, and non-ASCII characters correctly percent-encoded for safe transmission in web requests.

Feature Specifications

  • Full URI EncodingEncode all reserved and unsafe characters according to RFC 3986, including spaces as plus signs or percent-encoded hex values, with configurable encoding behavior.
  • Component and Full URL ModesChoose between encoding individual URL components (query parameters, path segments) or encoding the entire URL string, each applying the appropriate encoding rules.
  • Decoding SupportDecode percent-encoded URL strings back to their original form, stripping encoding to reveal the readable text for debugging, inspection, and data extraction workflows.
  • Query Parameter ParsingParse encoded query strings into structured key-value pairs, display them in a readable format, and re-encode with modifications for rapid URL parameter manipulation.

Architecture

The encoder uses React useState for input management and the browser's encodeURIComponent() and decodeURIComponent() functions for standards-compliant encoding and decoding.

Frequently Asked Questions

What is the difference between encodeURIComponent and encodeURI?

encodeURIComponent encodes all special characters including slashes, colons, and ampersands, suitable for individual URL components. encodeURI preserves URL structure characters, suitable for complete URIs.

How are spaces encoded in URLs?

Spaces can be encoded as %20 (percent-encoding) or + (form encoding). The tool supports both conventions, with %20 being the standard for URIs.

Does this handle international characters?

Yes. Non-ASCII characters are first converted to UTF-8 byte sequences and then percent-encoded, producing correct output for international domain names and path segments.

Is my URL data stored?

No. All URL strings, query parameters, and encoded output are processed entirely within your browser. No URL data is transmitted to external servers.