URL Encoder / Decoder

What this does

URLs can only contain a limited set of characters. Anything else — spaces, accented letters, emoji, special punctuation — has to be percent-encoded (e.g. %20 for space). This tool runs the standard encodeURIComponent / decodeURIComponent pair in your browser, so it works for query string values, form fields, and path segments. Use the Swap button to round-trip and verify your encoding is reversible.

When to use which

• Encode — you have plain text that needs to become safe URL content.
• Decode — you have a percent-encoded string you want to read in plain form.
• Decode will warn you if the input contains invalid escape sequences.