URL encoder and decoder

Encode or decode URLs, parameters and form values, one line or a batch at a time.

URL input

Encoding mode

Transform options

Decode rounds Batch by line

Output

Error location and sensitive parameter hints

Complete transform report

URL encoding boundary

Choose the mode

Use URL component for query values or path segments. Full URL mode preserves : / ? # & =. Form value mode follows application/x-www-form-urlencoded space and plus handling.

Locate errors

Malformed percent encoding, invalid UTF-8, failed batch lines, and layered encoding hints are shown as text diagnostics. Failed lines stay unchanged.

Sensitive parameters

The page reports common sensitive query key names only. Output is still the full transformed text, so redact before copying, downloading, or sharing.

Scope

Processes URL text without visiting the target address.