URL Encoder / Decoder
Encoders & DecodersEncode special characters in URLs using percent-encoding and decode URL-encoded strings back to plain text. Fast, free, and browser-based.
Plain URL
URL Encoded
About URL Encoder / Decoder
The URL Encoder & Decoder converts characters that are not allowed in URLs into their percent-encoded equivalents (e.g. space → %20) and decodes them back to readable text. This is essential when building URLs with query parameters, form submissions, or API endpoints that contain special characters.
Features
- ✓Percent-encodes all non-safe URL characters using encodeURIComponent
- ✓Decodes percent-encoded strings back to plain text
- ✓Handles multi-byte Unicode characters (e.g. Chinese, Arabic, emoji)
- ✓Shows clear error messages for malformed percent-encoded input
- ✓Copy encoded/decoded output with one click
- ✓100% browser-based — no data leaves your device
Common Use Cases
- Encoding query string values containing spaces, &, =, and other reserved characters
- Decoding URL parameters received from external APIs or analytics tools
- Building URL-safe redirect parameters for OAuth and SSO flows
- Debugging percent-encoded webhook payloads
Frequently Asked Questions
QWhat is URL encoding?
URL encoding (percent-encoding) replaces characters that are not valid in a URL with a % followed by their two-digit hexadecimal code. For example, a space becomes %20 and & becomes %26.
QWhat is the difference between encodeURI and encodeURIComponent?
encodeURI encodes a full URL while preserving its structure characters (/, :, ?, #, &). encodeURIComponent encodes individual query parameter values and escapes additional characters like /, :, and ?.