Quick Switch
URL Encoder & Decoder
100% In-Browser Execution
Raw URL or Parameter String100 chars
Encoded URL
Tool Documentation, Shortcuts & FAQs
How to Use URL Encoder & Decoder
- 1Choose 'Encode' or 'Decode' mode.
- 2Paste your URL or parameter string into the input box.
- 3Select 'Component (strict)' for query values or 'Full URL' for entire addresses.
- 4Review the parsed parameters breakdown below the output.
- 5Click 'Copy' to copy the converted string to clipboard.
Key Capabilities
Component vs Full URL Mode
Toggle between encodeURIComponent (strict encoding for query values) and encodeURI (preserves URL protocol and path separators).
Query Parameter Inspector
Automatically parses query strings into key-value pairs that you can review, edit, or copy individually.
Malformed URL Recovery
Catches URIError gracefully and pinpoints invalid percent-encoding sequences.
Instant Live Conversion
Converts text as you type with one-click copy and reset buttons.
Frequently Asked Questions
encodeURI is designed for complete URLs and does not encode protocol characters like ':', '/', '?', and '&'. encodeURIComponent is designed for query parameter values and encodes those reserved characters into percent sequences (%3A, %2F, %3F, %26).
Zero Data Retention
All calculations are performed strictly in client-side memory using your browser engine. No data is ever sent across the network.