URL Decoder

URL Decoder reverses percent-encoding (%20, %2F, unicode sequences) into human-readable text so you inspect query parameters, redirect targets, and analytics payloads.

Security reviewers decode suspicious links locally before clicking—seeing hidden javascript: or nested redirect targets in plain text.

Log files store encoded search terms—decode reveals actual user intent strings for support.

Double-encoded OAuth states break login flows—decode twice to diagnose.

• Inspect encoded redirect query params in auth bugs
• Read analytics debug URLs with long encoded payloads
• Verify UTM Decoder output against raw browser bar
• Decode mailto and deep link parameters for QA
• Forensics on phishing URLs without visiting them

1. 1Paste percent-encoded string or full query segment.
2. 2Run decode to view plain text output.
3. 3If garbled, try decode again in case of double-encoding.
4. 4Copy decoded value into tickets or JSON Formatter if JSON inside.
5. 5Do not visit decoded malicious URLs—inspection only.

• Plus (+) in query strings often means space in form encoding—some decoders treat + as space.
• Pair with URL Encoder after editing decoded values for re-insertion.
• JWT segments use Base64URL—use JWT Decoder, not URL Decoder.
• Clear panel after decoding tokens or PII.

• Invalid escape sequences error out—fix truncated copy-paste.
• Decoding does not validate URL safety—malicious targets remain dangerous.
• Common mistake — decoding entire marketing short link then clicking: decode for inspection only.