Online URL Encoder & Decoder

Easily encode and decode special characters in URLs, query strings, and webhooks. Pure browser execution protects your sensitive tokens and URLs.

At a glance

URL Encoder & Decoder is a free browser tool that encodes and decodes URLs and query parameters online with percent-encoding. It chooses between full URI mode or component-only percent encoding. It also converts live as you type or paste. All processing is local: nothing is uploaded, and no account is required.

Live Convert Spaces as '+'

Encoding Scope:

Query Component encodeURIComponent Full URL encodeURI

Plain String / Query Input 0 chars • 0 B

| |

Encoded URL Output 0 chars • 0 B

You May Also Need

Base64 Encoder

Binary & text encoder

JSON Formatter

Inspect & beautify JSON

PNG to WebP

Modern web compression

Why Use This URL Encoder & Decoder?

Dual Encoding Modes: Choose between full URI mode or component-only percent encoding.

100% Private Client-Side: Auth tokens and redirect URLs are never sent to external servers.

Real-Time Instant Output: Converts live as you type or paste.

Graceful Fallback: Handles malformed percent-encoded sequences cleanly without crashing.

How to Use URL Encoder & Decoder

Choose Mode & Scope

Select 'Encode' or 'Decode' and pick either Component mode or Full URL mode.

Input URL or String

Type or paste your query parameters, webhook URLs, or raw text strings into the editor.

Copy or Download

Click 'Copy Output' to use your safely escaped URL immediately.

Worked example: Query Value Percent-Encoding

The engine uses encodeURIComponent for component mode or encodeURI for full-URL mode, with optional spaces-as-plus handling and decodeURIComponent plus fallback sanitizing on decode.

Raw Query Value Input Source

https://example.com/search?q=hello world&lang=en café

Percent-Encoded Output Processed

https%3A%2F%2Fexample.com%2Fsearch%3Fq%3Dhello%20world%26lang%3Den%20caf%C3%A9

Technical Specifications & Engine Details

Technical specifications and engine details for URL Encoder & Decoder
Specification	Details
Supported Formats	TXT, URL → TXT, URL
Execution Mode	100% Client-Side In-Browser (client)
Browser Requirements	Requires modern web browser with ECMAScript 6+ and standard DOM Web APIs.
Performance Constraints	Client browser memory limit (typically 1–2 GB RAM); processing speed depends on local device CPU.

Maintained by Pragyan Pahadi

100% Client-Side Privacy Guarantee

Your URLs and tokens remain strictly inside your browser. Zero data is transmitted to external servers.

Frequently Asked Questions

What is the difference between encodeURI and encodeURIComponent?

encodeURI is designed for complete URLs and preserves protocol, host, and path delimiters (like :// and /). encodeURIComponent encodes everything except standard alphanumeric characters, making it suitable for query parameter values.

Are my query strings or tokens stored on your servers?

No. All URL encoding and decoding runs 100% in your local browser memory.

What does percent-encoding do?

Percent-encoding replaces unsafe ASCII characters with a '%' followed by two hexadecimal digits, allowing special characters and spaces to be safely transmitted in internet URLs.

Methodology

This tool runs entirely in your browser. The example above shows a representative input and the result it produces.

Last updated October 2026.