URL encode and decode

Percent-encode or decode URLs and query parameters.

Encoding uses encodeURIComponent, which is right for individual query parameter values.

How to use it

  1. Choose Encode or Decode.
  2. Paste your text.
  3. Copy the result.

Questions

Are my files uploaded to a server?

No. The tool runs entirely in your browser using JavaScript, so your files never leave your device. You can even disconnect from the internet after the page loads and it keeps working.

Guides

All guides
Developer tools · 23 Oct 2026How to Decode a Base64 Encoded String (Linux, JS, Python)How to decode a Base64 encoded string online or with Linux, PowerShell, JavaScript atob/btoa and Python, and why Base64 is not encryption.Developer tools · 23 Oct 2026How to Decode a URL Encoded String (%20 and More Explained)Decode URL encoded strings like %20 and %3A online or in JavaScript, Python, Java and C#. Learn encodeURIComponent, + vs %20 and query strings.Developer tools · 23 Oct 2026JSON Formatter and Validator: Fix Common JSON Errors FastFormat and validate JSON privately, understand errors like trailing commas and single quotes, and format JSON in VS Code, Notepad++ or the terminal.

Related tools

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Base64 encode / decodeEncode or decode Base64 text with UTF-8 support.JSON formatterBeautify, validate or minify JSON, privately.Image to Base64Get a data URL for HTML or CSS, or turn Base64 back into an image file.UUID generatorRandom v4 UUIDs, up to 1000 at once.Password generatorStrong random passwords, generated on your device.QR code generatorTurn a link or text into a QR code that never expires.SHA-256 hashHash text or files with SHA-256, SHA-1, SHA-384 or SHA-512.