Developer Tools

URL Encoder / Decoder

Percent-encode or decode URLs and query string components.

How to use URL Encoder / Decoder

  1. Choose Encode or Decode.
  2. Paste your URL or query string.
  3. Click Convert and copy the result.

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Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text, with correct handling of Unicode characters.

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Convert text to HTML entities or decode HTML entities back to plain text.

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JSON Formatter & Validator

Format, minify and validate JSON with clear error messages and adjustable indentation.

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UUID Generator

Generate random UUID v4 values using your browser’s cryptographically secure random number generator.

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Timestamp Converter

Convert between Unix timestamps and human-readable dates, in both seconds and milliseconds, local time and UTC.

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Regex Tester

Test regular expressions against sample text with live match highlighting and capture groups.

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Frequently asked questions

Why does + sometimes mean a space?

In query strings, + traditionally represents a space, while %20 is the strict percent-encoded form. This tool uses standard percent-encoding via encodeURIComponent.