100% Client-Side

URL Decoder

Free online URL decoder. Decode percent-encoded URLs and query strings back to readable text instantly in your browser. — runs 100% in your browser, client-side only. No data is sent to any server. Free to use, no account required.

Free Client-Side No Login No Storage
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How to Use the URL Decoder

  1. Paste a percent-encoded URL into the input field.
  2. Click Decode to convert back to readable text.

URL decoding converts percent-encoded characters (like %20 for space, %3D for =) back to their original characters.

What is URL Decoding?

URL decoding reverses percent-encoding, converting %XX sequences back to their original characters. For example %20 becomes a space, %40 becomes @, %2F becomes /. This is essential when reading URL parameters that were encoded before transmission.

Why Use This Tool

When analyzing logs, debugging OAuth callbacks, or inspecting encoded API requests, you need to see the actual parameter values. URL decoding reveals the human-readable content hidden behind percent-encoding.

When to Use It

Use URL decoding when reading query parameters from server logs, debugging encoded redirect URLs, inspecting OAuth callback parameters, or analyzing encoded data copied from browser address bars.

Common Uses

  • Decoding query parameters from server logs or analytics data
  • Debugging encoded redirects and OAuth callback URLs
  • Reading encoded data from browser URL bars
  • Inspecting encoded API request parameters

Frequently Asked Questions

Why do I see %20 in my URL?

%20 is the URL-encoded form of a space character. Spaces are not allowed in URLs so browsers and servers automatically encode them. You'll also see this in file download URLs that contain spaces in the filename.

What is the difference between decodeURI and decodeURIComponent in JavaScript?

decodeURI decodes a full URL but preserves structural characters like /, ?, &. decodeURIComponent decodes everything including those structural characters — use it for decoding individual parameter values, not entire URLs.

Is it safe to decode URLs in the browser?

Yes. CipherKit runs 100 % client-side — no data is sent to any server. It is safe to decode any URL here, including those containing sensitive query parameters.