URL Encode / Decode

Encode characters and symbols into special codes, or decode URL-encoded strings

Features

Supports three encoding methods

Choose encodeURIComponent and others by purpose

Both encoding and decoding

Restore encoded strings back to their original characters

PHP urlencode compatible

Converts spaces to + to reproduce legacy behavior

Batch-convert multiple lines at once

Encode space-separated words individually

How to use

Switch the conversion direction

Select encode or decode with the tabs

Specify the conversion mode

Choose from urlencode, encodeURIComponent, or encodeURI by purpose

Enter the target string

Paste the string to convert into the text field, or load it from a sample

Check and copy the result

The result appears instantly after pressing, ready to copy and use

Use cases

Building query parameters

Convert values containing Japanese or symbols into a form safe to embed in a URL

Decoding encoded URLs

Turn a URL full of percent signs back into readable characters to check its contents

Formatting API request values

Encode parameters sent to an API to avoid communication errors

Investigating garbled URLs

Pinpoint unexpected conversions to help isolate issues

Basic Knowledge

What is URL Encoding

URL encoding is the conversion of characters that cannot be written directly in URLs, such as Japanese characters and symbols, into percent-prefixed hexadecimal notation like "%E3%81%82". It is also called percent encoding. The long strings of % symbols you see when sharing Japanese URLs are an example of this.

Difference Between "+" and "%20" for Spaces

When encoding spaces, there are two methods: "+", which originates from the old convention of form submission, and "%20", which can be used in URLs generally. If you mistake which encoding method was used, discrepancies can occur in the decoding result, such as a "+" remaining or disappearing.