URL Decoder

What Is URL Decoding?

Decoding reverses percent-encoding: %20 becomes a space, %2F becomes a slash, and multi-byte UTF-8 sequences become the original characters. It is the companion step to encoding when you read values from logs, network traces, or query strings.

ToolLane applies decodeURIComponent in your browser. Enable Treat + as space (form-urlencoded) when the source used plus signs for spaces—common in HTML form posts. Invalid % sequences surface as an error in the Decoded panel instead of failing silently.

How to Use This URL Decoder

Paste encoded text, adjust the plus toggle if needed, read the human-readable output, then copy.

1. Paste encoded text. Use the Encoded text area for the percent-encoded fragment you want to inspect—often a single component, not a full URL with ambiguous slashes.
2. Set Treat + as space. Leave it on for typical application/x-www-form-urlencoded values; turn it off if plus signs must stay literal.
3. Review the Decoded panel. Confirm the UTF-8 text matches what you expected before you reuse it elsewhere.
4. Copy output. Use Copy output to move the decoded string to your editor or ticket. Fix malformed % sequences if you see an error message.

Why Use ToolLane URL Decoder?

You can verify payloads locally instead of piping sensitive URLs through a third-party decoder tab.

• Free with no signup.
• decodeURIComponent parity with how front-end code usually decodes values.
• Form-friendly toggle for plus vs literal plus behavior.
• Clear error messages when a string contains invalid escape sequences.

When Decoding Helps Most

Any time encoded text hides the real user input or token, a decoder makes it readable again.

• Redirect and SSO debugging where state parameters arrive percent-encoded.
• Search and analytics URLs copied from the address bar.
• API error payloads that echo escaped query fragments.
• Pairing with the ToolLane encoder to round-trip a value during QA.