URL Encoder/Decoder — Free Online Tool
Encode and decode URLs and query strings
All processing happens locally. No data is sent to any server.
URL encoding converts special characters into percent-encoded format safe for transmission in URLs. Our URL Encoder/Decoder supports both component encoding (for individual parameters) and full URL encoding. Paste a URL or text to encode/decode, and view the results instantly. The tool also parses query parameters into a readable table format, making it easy to inspect and modify individual parameters. Choose between component encoding (encodeURIComponent) which encodes all special characters, or full URL encoding (encodeURI) which preserves the URL structure like : / ? & =. This is essential when building query strings, handling form submissions, or working with APIs that require properly encoded parameters. The tool handles edge cases like encoding non-ASCII characters and special symbols correctly. You can copy the encoded output with a single click, or download it as a text file. The readable parameter table is especially helpful for debugging complex query strings with multiple parameters or nested values in your web applications. All processing happens in your browser — your data never leaves your device. This makes it safe to use with sensitive API keys, tokens, or confidential query parameters. For related encoding tasks, check out our [Base64 Encoder/Decoder](/tools/base64) for binary-to-text encoding, or use our [Regex Tester](/tools/regex-tester) to validate URL patterns.
FAQ
What is URL encoding?
URL encoding (percent encoding) converts characters into %XX format. For example, a space becomes %20. This is necessary because URLs can only contain ASCII characters.
What is the difference between component and full URL encoding?
Component encoding (encodeURIComponent) encodes all special characters. Full URL encoding (encodeURI) preserves URL structure like : / ? & =
Why do I need URL encoding?
URLs can only contain certain characters. Special characters like spaces, ampersands, and non-ASCII characters must be encoded to be safely transmitted in URLs.
Is my data safe?
Yes. All encoding and decoding happens in your browser. Your data never leaves your device.