PIPELINE Encoding & Decoding Beginner 2 steps

URL double decode

Some legacy systems or misconfigured proxies apply URL encoding more than once, producing strings like %2520 instead of %20. Running the decoder twice peels both layers and restores the original value. Always inspect the intermediate output after the first decode to confirm a second layer is actually present.

What it solves

Decode a URL-encoded string that has been encoded twice, recovering the original plaintext.

Input → Output

URL Decoder input → URL Decoder output across 2 steps.

Runs in

1–2 minutes · fully local in your browser.

Before you start

A string that has been URL-encoded two or more times

The pipeline

1 URL Decoder url-decode

Decode percent-encoded URL text back to readable characters. Free, private, and 100% client-side.
2 URL Decoder url-decode

Decode percent-encoded URL text back to readable characters. Free, private, and 100% client-side.

Open in Toolchain

Runs locally in your browser. The recipe defines the pipeline only — your input never leaves this tab.

▶Run this workflow

Enter your input below and click Run. All processing happens locally in your browser — nothing is uploaded.

Input data

Pipeline progress

URL Decoderurl-decode
URL Decoderurl-decode

Sample input

%2541%2542%2543

Expected output

ABC

This pair is executed against the real tools at build time (tests/unit/recipes.test.ts) — the expected output is verified, not illustrative.

Related workflows

Decode URL and show hex bytes

Percent-decode a URL-encoded string then view its hexadecimal byte representation for low-level analysis.

Decode nested URL parameter (Base64 JSON)

Unwrap a URL parameter that carries URL-encoded Base64 JSON into readable, formatted JSON.

You might also need

Workflows sharing tools or topics with this recipe.

URL Decode and Parse

URL-decode then parse the URL into components.

Base64 encode then decode round-trip

Encode text to Base64 and decode it back to verify the round-trip preserves the original data.

Learn more

How to Implement OAuth 2.0 PKCE Flow

Implement the Proof Key for Code Exchange (PKCE) extension to OAuth 2.0 Authorization Code flow for secure public client authentication.

How to Parse Query Strings

A beginner-level guide covering query-string, url, parsing. Includes step-by-step instructions, common errors, troubleshooting tips, and security considerations for query-string.

Tools used

Decode percent-encoded URL text back to readable characters. Free, private, and 100% client-side.