#178 · Converters & Encoding Text Tool

URL Decoder

URL Decoder turns percent-encoded sequences back into readable text and flags malformed or double-encoded URL fragments.

Text Input

Converter input

Recent History

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How to use this text tool

  • Paste or upload your text into the input box.
  • Choose the conversion format and any repair or live-preview options.
  • Run the tool, then copy, download, or export the result.

What this tool does

Decoded output = percent sequences such as %20 converted to their UTF-8 characters.

Decoded output = percent sequences such as %20 converted to their UTF-8 characters.

If the result still contains encoded sequences like %2520, the input may have been encoded twice.

Example

Example input: hello%20world%3Fname%3DCallText%26lang%3Den. Run the tool to generate the converted result and view integrity metrics.

Use cases

  • Programming and debugging
  • API and web development
  • Encoding lessons and documentation
  • Data cleanup before import or export

Tips for better output

  • Use auto-detect when pasted data has mixed separators or formats.
  • Check the data integrity score before copying output into code.
  • Use JSON or CSV export when documenting conversion results.
  • For non-ASCII text, prefer Unicode or UTF-8 workflows.

Processing details

This tool runs locally in the browser and performs deterministic text conversion without uploading your input. Metrics include size, validity, and character-level analysis where relevant.

Browser text decoding may display binary data as replacement characters. For sensitive secrets, remember that encoding is not encryption.

FAQ

How do I decode a URL encoded string?

Paste the encoded value and run the decoder. Percent sequences such as %20 are restored to readable characters.

Why is my URL encoded twice?

Patterns such as %2520 indicate that the percent sign itself was encoded. Decode once more only if that second layer is intentional.

How do I fix malformed URL encoding?

Malformed escapes such as % or %2 are invalid. The tool flags them so you can repair or remove the broken sequence.

How do I decode API query parameters?

Paste the parameter value, enable plus-to-space handling if needed, and decode it into readable text.

Why does %20 become a space in URL decoding?

%20 is the percent-encoded UTF-8 byte for a space character, so decoding restores it as a normal space.

Conversion modules

ModulePurpose
Conversion EngineApplies the selected encoder or decoder.
ValidationDetects invalid input, malformed sequences, or unsupported characters.
Data Integrity ScoreScores conversion safety from 0 to 100.
Export ToolsCopies or downloads output as TXT, CSV, or JSON.

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