URL Encoder & Decoder — Online Tool
Encode and decode URLs with encodeURIComponent and decodeURIComponent in real time.
About this tool
Encode strings using encodeURIComponent or decode percent-encoded URLs using decodeURIComponent instantly. Real-time conversion, error handling for invalid encoded strings, and a swap button to reverse input and output in one click.
linkEncode or Decode Instantly
Paste any string to encode it for safe use in a URL, or paste a percent-encoded string to decode it back to readable text. Switch modes instantly and swap input/output with one click.
URL encoding is essential when passing user input as query parameters — prevents injection attacks and malformed requests.
Quick Usage Guide
- 1Encode strings with encodeURIComponent
- 2Decode percent-encoded strings with decodeURIComponent
- 3Real-time conversion as you type
- 4Swap input and output in one click
- 5Error handling for malformed encoded strings
- 6100% client-side — your data never leaves your browser
Frequently Asked Questions
help_outlineWhat is URL encoding?
URL encoding (percent-encoding) converts special characters into a format that can be safely transmitted in a URL. For example, a space becomes %20 and & becomes %26.
verifiedWhat is the difference between encodeURI and encodeURIComponent?
encodeURI encodes a full URL, preserving characters like /, ?, &, and #. encodeURIComponent encodes individual query parameter values and escapes nearly all special characters including /, ?, and &.
quizWhat happens with invalid encoded strings?
If the input contains malformed percent sequences (e.g. %ZZ), an error message is shown instead of crashing the tool.
account_balance_walletCan I decode an entire URL with this tool?
This tool uses decodeURIComponent, which decodes individual URL components. For full URLs, manually decode each query parameter value separately.