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URL Encoder / Decoder

Encode URI components so they are safe to include in links and form submissions. Decode incoming values and parse query strings into a structured object for easy use.

UUID GeneratorRegex TesterURL Encoder
Utilityv1.0.0

URL Encoder & Decoder

Encode or decode URLs and query strings instantly. Three encoding modes, a query parameter parser, and a full URL component breakdown: 100% local.

Text to Encode

67 bytes · 67 chars

Encoded OutputComponent
Hello%20World!%20Price%3A%20%2429.99%20%26%20discount%3D10%25%20%7C%20email%3A%20user%40example.com

99 bytes · 99 chars+47.8% larger

67 BInput Size
99 BOutput Size
ComponentMode
EncodedDirection

Three Encoding Modes

Component encoding for query values, Full URL encoding that preserves structural characters, and Form encoding where spaces become +.

Query Param Parser

Paste any URL or query string and get an instant breakdown of every key-value pair, decoded for readability.

100% Private & Local

All encoding and decoding uses the browser's native encodeURIComponent and decodeURIComponent APIs. Nothing leaves your device.

Guide

How to Encode or Decode a URL

1

Choose direction

Select Encode to percent-encode text, or Decode to convert an encoded string back to readable form.

2

Pick encoding mode

Choose between encodeURIComponent (query values), encodeURI (full URLs), or Form (x-www-form-urlencoded).

3

Convert Instantly

Output updates as you type: no button press needed. Paste a full URL into the parser tab to break it into its components.

4

Copy or swap

Copy the output with one click, or hit Swap to move the result back into the input for chained operations.

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Use Cases

Who Uses a URL Encoder?

Frontend Developers

Encode query parameter values before appending them to fetch calls or building dynamic URLs in JavaScript.

Backend Developers

Decode incoming percent-encoded form data and URL query strings from HTTP requests.

QA Engineers

Verify that your application encodes special characters correctly before integration and end-to-end tests.

DevOps Engineers

Encode special characters in webhook URLs and callback endpoints for CI/CD pipeline configuration.

SEO Specialists

Decode and inspect crawled URLs to verify parameter structure, canonical paths, and tracking tags.

Security Researchers

Decode obfuscated or double-encoded URLs found in phishing links, malware payloads, and web application logs.

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Comparison

Endless Forge vs Other URL Tools

Three encoding modes, a query parser, and full URL breakdown - all local.

Feature
Other Toolsaverage
Endless Forge✦ This website
Three encoding modes
Sometimes
Yes
Query parameter parser
Sometimes
Yes
Swap input & output
No
Yes
Zero server processing
No
Yes
Works offline
No
Yes
Free to use
Limited
Yes
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Every URL encoding scenario covered

The Endless Forge URL Encoder handles the three encoding scenarios developers actually encounter: encodeURIComponent for individual query values, encodeURI for complete URLs, and application/x-www-form-urlencoded where spaces become +. The Query Parser tab goes further: paste any URL to get an instant decoded table of every parameter.
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FAQ

Frequently Asked Questions

encodeURIComponent encodes everything except letters, digits, and - _ . ! ~ * ' ( ). It's for individual values like query parameters. encodeURI leaves structural URL characters intact and is designed for encoding a complete URL without breaking its syntax.
You need to encode URL components when they contain characters that have special meaning in URL structure or that are outside the safe ASCII range. Common situations include encoding query parameter values that contain spaces, ampersands, or equals signs, and encoding non-ASCII characters like accented letters in a URL. If you are building API authentication headers or encoding binary data for URL transport, the Base64 Encoder with URL-safe mode is often more appropriate than percent-encoding for that specific use case.
Percent encoding represents a character as a percent sign followed by two hexadecimal digits. For example, a space is %20, an ampersand is %26, and an at sign is %40.
A literal + in a query value should be encoded as %2B when using Component encoding, because + is interpreted as a space in form-encoded data.
No. All URL encoding and decoding is performed locally in your browser using JavaScript's built-in encodeURIComponent() and decodeURIComponent() functions. No data is transmitted to any server. For decoding JWT tokens that are passed in URL query parameters, the JWT Decoder handles both the URL-decoding and the Base64URL-decoding of the token segments in one step.
Never. All encoding and decoding uses the browser's native APIs. Nothing you type is transmitted anywhere.

6 questions answered

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