URL Encoder - Percent Encode Text Online

Encode URLs and query strings with percent encoding. Convert special characters for safe URL transmission. Fast, private, works offline in your browser.

Input

Drop text file or browse

Encoding Method

encodeURIComponent Recommended

For query parameters and user input

encodeURI

Preserves URL structure (:, /, ?, &, =)

Encoded Output

Statistics

Input

Output

Increase

Common Encodings

space → %20
& → %26
= → %3D

? → %3F
# → %23
/ → %2F

URL Decoder - Decode Percent Encoding

View all Url encoders →

Frequently Asked Questions

URL encoding (percent encoding) converts special characters into percent-encoded format (e.g., space becomes %20, & becomes %26) so they can be safely transmitted in URLs without breaking the URL structure or causing parsing errors.

encodeURI preserves URL structure characters (:, /, ?, &, =) for encoding complete URLs. encodeURIComponent encodes everything except alphanumerics and - _ . ! ~ * ' ( ), making it ideal for query parameter values and user input.

Use encodeURIComponent for individual parameter values, user input, and any data that might contain URL-special characters. Use encodeURI only for complete URLs where you need to preserve the structure.

With encodeURIComponent (recommended), all characters except A-Z, a-z, 0-9, and - _ . ! ~ * ' ( ) are encoded. This includes spaces, quotes, brackets, &, =, /, ?, #, and all non-ASCII characters.

URL encoding makes text safe for URLs - it's designed to be reversible and provides no security. Encryption protects data confidentiality using keys. Anyone can decode a URL; encrypted data requires the correct key.

Encode when: adding user input to URLs, passing special characters in query strings, handling non-ASCII characters, embedding URLs as parameter values, or building API requests with dynamic parameters.

Yes. encodeURIComponent properly handles all Unicode including Chinese, Arabic, emojis, and special symbols by converting them to UTF-8 byte sequences (%E2%9C%93 for ✓, multi-byte sequences for emojis).

Standard URL encoding uses %20 for spaces. The + sign for spaces is legacy application/x-www-form-urlencoded format. Modern APIs prefer %20. This tool uses standard %20 encoding.

Encode parts separately. Use encodeURIComponent for query parameter values and path segments containing user data. Don't encode the entire URL structure - that breaks :, /, ?, & separators.

Yes. All encoding happens entirely in your browser using JavaScript's built-in encodeURI and encodeURIComponent functions. No data is sent to any server - your content stays completely private.

Input

Encoding Method

Encoded Output

Statistics

Common Encodings

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