Percent-encode special characters in URLs for safe transmission, or decode URL-encoded strings back to readable text online for free. Free URL encoder.
Paste your string at tools.arkaserve.com/url-encode, select "Encode," and the output converts all unsafe characters to percent-encoded equivalents: spaces become %20, & becomes %26, = becomes %3D, + becomes %2B, and # becomes %23. This is essential for building API query strings and form submissions. Completely free, no signup.
Select "Decode," paste the percent-encoded string (e.g., https://example.com/search?q=hello%20world%20%26%20more), and the readable version appears instantly. This is useful for debugging API responses, reading encoded form submissions, analyzing redirect chains, or understanding obfuscated URLs in web security work.
URL encoding (percent-encoding) is specifically for making data safe to include in a URL — it replaces unsafe characters with %XX hex codes. Base64 converts binary data to printable ASCII text for use in non-URL contexts like HTTP headers, JSON payloads, and email. For query string parameters, use URL encoding. For embedding images or credentials in headers, use Base64.