URL Encoder & Decoder (Percent-Encoding / Escaping)
Encode special characters into percent-encoded URL strings, or decode URLs back to plain text.
TL;DR: URL Encoder / Decoder provides bidirectional percent-encoding (RFC 3986) for URLs and query parameters.
What Is URL Encoding (Percent-Encoding) and Why Is It Used?
URL encoding (also known as percent-encoding) is a mechanism for encoding characters in a Uniform Resource Identifier (URI) under RFC 3986. Characters that are not within the standard ASCII unreserved set (such as spaces, ampersands `&`, question marks `?`, slashes `/`, and non-Latin characters) are replaced by a `%` followed by their two-digit hexadecimal ASCII/UTF-8 byte value.
How to Use the URL Encoder / Decoder
Our URL Encoder / Decoder is engineered for rapid developer workflow, high-performance in-browser execution, and complete code privacy.
- Select your mode: 'Encode URL' or 'Decode URL'.
- Paste your URL, query string, or plain text into the input field.
- Choose encoding scope: Full URL (`encodeURI`) vs Query Component (`encodeURIComponent`).
- Click 'Process' to perform the conversion.
- Copy the encoded or decoded URL to your clipboard.
Key Capabilities & Developer Best Practices
- Fast In-Browser Processing: Zero server latency; code formatting, validation, and transformations execute in real time.
- Complete Data Confidentiality: Work with sensitive API keys, production configs, and database records safely on your local device.
- Standards-Compliant Output: Generates clean, RFC-compliant code ready for production deployment and clean Git diffs.
100% Client-Side Privacy Guarantee
All parsing, formatting, validation, cryptographic hashing, and code transformations occur 100% locally inside your web browser. Your source code, database queries, and private payloads are never uploaded to any remote server.
Frequently Asked Questions
- URL encoding is a process that converts reserved and unsafe characters in web addresses into safe `%XX` hexadecimal format so web browsers and servers can parse query strings accurately.
- Paste your URL or query parameter into NexLove's URL Encoder and click 'Encode'. Spaces become `%20` or `+`, and special symbols are converted to percent-encoded codes.
- `encodeURI` preserves full URL structural characters (like `http://`, `:`, `/`, `?`, `&`), while `encodeURIComponent` encodes all reserved characters, making individual query values safe to append.
- In standard URI percent-encoding (RFC 3986), spaces are encoded as `%20`. In HTML form POST data (`application/x-www-form-urlencoded`), spaces are often represented as `+`.
- Yes. The decoder supports full multi-byte UTF-8 percent-encoding, restoring Cyrillic, Chinese, Arabic, and emoji characters to their original text.
- No. 100% of URL encoding and decoding runs in your browser's local JavaScript engine with complete privacy.
- Characters like `?`, `&`, `=`, and `#` are reserved for URL routing and query structure; if data values contain those characters unescaped, web servers will misinterpret the URL parameters.
- Most modern web browsers and CDNs support URLs up to 2,048 characters, though servers can be configured to accept longer URLs.
Embed This Tool
Add the live URL Encoder / Decoder to your own website with this lightweight responsive iframe:
<iframe src="https://nexlove.org/embed/url-encoder.html" width="100%" height="650" style="border:1px solid #e2e8f0;border-radius:12px" title="URL Encoder / Decoder — NexLove.org" loading="lazy"></iframe>