URL Encoder / Decoder
Quick Answer
URL encoding (percent-encoding) replaces unsafe characters in a URL with a % followed by two hex digits so they are safe to use in links and query strings.
What Is URL Encoder / Decoder?
URL Encoder / Decoder is a free online developer tools tool that encode or decode url components with percent-encoding support. URL encoding (percent-encoding) replaces unsafe characters in a URL with a percent sign followed by two hex digits. For example, a space becomes %20 and a colon becomes %3A. This is necessary because URLs can only contain a limited set of ASCII characters safely — characters like spaces, quotes, and non-ASCII letters must be encoded before they are used in a link. This tool performs both encoding and decoding. Encode takes plain text and percent-encodes every unsafe character so the result can be used in a URL or query string. Decode converts percent-encoded text back to the original. Only encode the parts of a URL that need it (typically the path and query parameters), and never encode an already-encoded string twice. All processing runs in your browser. Unlike many similar tools, it runs entirely in your browser — no data is sent to any server, no account is required, and there are no usage limits. Whether you are a developer, writer, SEO professional, or casual user, this tool provides instant, accurate results without friction.
How to Use URL Encoder / Decoder
Paste text or a URL into the input and choose encode or decode. The result appears instantly. Copy it for use in links, query strings, or to reverse a previously encoded value.
Key Features
- Percent-encode and decode in one tool
- Handles all unsafe URL characters
- Works with full URLs or individual query parameters
- Fully client-side processing
Common Use Cases
- Preparing a URL that contains spaces or special characters
- Building query parameters with Unicode values
- Decoding percent-encoded URLs from server logs
Common Mistakes to Avoid
- Encoding an already-encoded string a second time
- Encoding the entire URL instead of only the parts that need it
- Forgetting to decode when reading percent-encoded log entries
Related Topics & Entities
- URL Encoding
- Percent-encoding
- Query string
Common Questions About URL Encoder / Decoder
Related Tools & Resources
- Base64
- HTML Entity Encoder
Best Practices for URL Encoder / Decoder
To get the most out of URL Encoder / Decoder, follow these best practices. Ensure your input data is clean and properly formatted for the most accurate results. Use the copy function to transfer output directly to your clipboard. Bookmark the tool for easy access. Check the related tools section below for complementary utilities that can enhance your workflow. Remember that all processing is client-side, so your data never leaves your browser.
More Encoding & Encryption Tools
URL Encoder / Decoder is part of the Encoding & Encryption Tools topic. Explore related tools in this cluster:
Privacy & Security
URL Encoder / Decoder processes all data entirely within your browser using JavaScript. No text, files, or personal information is transmitted to any server. Your data stays on your device, making this tool safe for sensitive content. We do not track usage, store inputs, or share data with third parties. The tool works offline after the initial page load and requires no account to use.
Frequently Asked Questions
Find answers to common questions about this tool.