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Encode and decode URLs with percent-encoding (RFC 3986)
Discover the powerful capabilities of our url encoder / decoder.
Encode special characters in URLs using percent-encoding (RFC 3986)
Decode percent-encoded URL strings back to human-readable text
Swap input and output with one click to quickly reverse the operation
Handles full URLs, query parameters, path segments, and individual values
Detects malformed % sequences and invalid encoded strings
All encoding and decoding runs in your browser — no data sent to servers
Tools that work great together with URL Encoder / Decoder
Discover all 39 free tools — text, image, developer, SEO, calculators and more
Browse All ToolsThe URL Encoder / Decoder is a free, browser-based utility designed for developer productivity. Encode and decode URLs with percent-encoding (RFC 3986) Unlike desktop software that requires installation, this tool runs entirely in your browser — meaning no downloads, no accounts, and no data ever sent to a server. You get instant results right in your tab.
Whether you are a developer, student, writer, or designer, the URL Encoder / Decoder saves time by automating repetitive tasks that would otherwise require expensive software or technical knowledge. It is completely free with no usage limits — use it as many times as you need.
There are many tools available online for developer productivity, but the URL Encoder / Decoder on AppyGrid stands out for several reasons:
Getting started with the URL Encoder / Decoder takes less than a minute. Here is a detailed walkthrough:
Choose Mode
Select Encode to percent-encode, or Decode to reverse it
Paste Your Text
Enter a URL, query string, or any text to encode or decode
Click the Button
Hit URL Encode or URL Decode to process the input
Copy the Result
Copy the output or use the swap button to flip input/output
The entire process typically takes under 30 seconds. The URL Encoder / Decoder is designed for speed — no waiting for server processing, no upload progress bars, and no page reloads.
The URL Encoder / Decoder is used by a wide range of professionals and enthusiasts across different fields. Here are some common use cases:
No matter your background or use case, the URL Encoder / Decoder delivers fast, accurate results without the overhead of heavyweight software or complex setup.
Here are detailed answers to the most common questions about the URL Encoder / Decoder:
URL encoding (percent-encoding) converts characters that are not safe in URLs into a % followed by two hexadecimal digits. For example, a space becomes %20, and & becomes %26. This ensures URLs can be transmitted safely over the internet.
Encode values when you're including user-provided text in a URL — especially in query string parameters. For example: `https://example.com/search?q=hello+world` should be `?q=hello%20world`. Never encode the full URL structure (protocol, slashes, domain).
This tool uses `encodeURIComponent`, which encodes all characters except letters, digits, and `- _ . ! ~ * ' ( )`. This is appropriate for encoding individual parameter values. `encodeURI` preserves URL-structural characters like `:`, `/`, `?`, `&` — use it for full URLs, not parameter values.
%20 is the URL-encoded representation of a space character. The % sign indicates an encoded character, and 20 is the hexadecimal ASCII code for space (decimal 32).
The + sign is used to represent spaces in application/x-www-form-urlencoded format (HTML form submissions). In modern RFC 3986 URL encoding, %20 is the correct encoding. Some servers accept both, but %20 is more universally correct.
The tool will detect and report malformed percent sequences (e.g., `%GG` or a trailing `%`). Valid portions before the malformed sequence may not be decoded. Fix the broken encoding first.
AppyGrid is a free online tools platform built for developers, writers, designers, and everyday users. Every tool on AppyGrid — including the URL Encoder / Decoder — is free, requires no account, and processes data entirely in your browser. We believe that useful utilities should be accessible to everyone, everywhere, without paywalls or data collection.
The URL Encoder / Decoder is one of 38+ free tools available on AppyGrid, covering developer productivity, text processing, image editing, SEO, calculators, and more. Related tags for this tool include: url, encode, decode, percent, developer.
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