URL Encoder / Decoder help

Encode text for safe use in a URL, decode it back, and take a query string apart to change one parameter. Nothing is uploaded.

Encode / decode

1. Paste a URL or a value.
2. Choose One value to encode a single field (spaces become %20, & becomes %26), or Whole URL to encode a full address while leaving :, /, and ? intact.
3. Press Encode or Decode.

Query string builder

1. Paste a URL or a bare query string. Each parameter becomes an editable row.
2. Change, add, or remove rows. The rebuilt query updates live and is re-encoded correctly.

Notes

• Decoding treats + as a space, matching how form data is encoded.
• Invalid percent sequences are left as-is rather than throwing.

Everything runs in your browser. Nothing you enter or drop is uploaded.