URL Encoder & Decoder
Local ProcessingEncode and decode URL parameters or full links, parse query parameters, and inspect URL components locally. Encode and decode URLs safely, split parameter tables, and analyze request queries offline in real time.
Raw Text / Plain URL
Resulting Output
💡 URL Encoding Functions Reference Card
URL encoding converts characters into format that can be safely transmitted over the Internet. The differences between browser functions are important:
| Function Name | Description & Intended Use Case | Preserved Characters (Not Encoded) |
|---|---|---|
| encodeURI(url) | Used to encode a complete URL. It keeps valid URL structural separators (like protocol slashes, domain names, query markers) intact so the browser can still navigate the output. | A-Z a-z 0-9 ; , / ? : @ & = + $ - _ . ! ~ * ' ( ) # |
| encodeURIComponent(segment) | Used to encode a query parameter value, path segment, or data payload. It escapes structural separators (like ? or &) to prevent parameters from breaking the host URL structure. | A-Z a-z 0-9 - _ . ! ~ * ' ( ) |
🔒 Privacy Notice: All URL encoding and decoding operations are executed 100% locally inside your web browser sandbox. No input strings, parameters, or URLs are ever uploaded to external servers or logged.
Frequently Asked Questions
🤔 Why do we need URL Encoding (Percent Encoding)?▼
URLs can only be sent over the Internet using the US-ASCII character set. Since URLs often contain special characters outside this ASCII range (like spaces, Unicode characters, and brackets), these characters must be converted into a valid ASCII format. URL encoding replaces unsafe characters with a % followed by two hexadecimal digits.
🛠️ What characters are escaped in batch mode?▼
Batch mode processes lines individually. Each line is URL-encoded or URL-decoded according to your selected active schema configuration (encodeURI or encodeURIComponent) and output back line-by-line, which is ideal for cleaning up lists of web scrape data or raw log files.
⚠️ What does the 2,000 character limit warning mean?▼
While the HTTP specification does not impose a maximum limit on URL lengths, practical server configurations (such as Apache and IIS limits) and proxy caches limit URLs to around 2,000 to 8,000 characters. Most notoriously, historical browsers like Internet Explorer had a strict 2,083 character limit. Keeping URLs under 2,000 characters guarantees they will load properly on all clients.