My URL has `%252F` instead of `%2F`

it's been double-encoded. `%25` is the encoding of `%` itself. Your code is encoding an already-encoded string. Decode once to get `%2F`, decode again to get `/`. Find where the double encoding happens and fix it.

Spaces show as `+` in some places and `%20` in others

both are valid, but in different contexts. `+` is only valid in query strings (HTML form encoding). `%20` works everywhere. If you need consistency, use `%20`.

I encoded a full URL and now the slashes are gone

you used `encodeURIComponent()` on the whole URL instead of just the parameter values. Use `encodeURI()` for full URLs, or better, build the URL piece by piece with `encodeURIComponent()` on each value.

Non-ASCII characters aren't encoding correctly

make sure your input is UTF-8. URL encoding operates on bytes, not characters. UTF-8 `ü` is 2 bytes → `%C3%BC`. If your system uses a different encoding, the percent-encoded bytes will differ.

My decoded URL still has encoded characters

some characters are legitimately part of the URL structure and shouldn't be decoded. `%2F` in a path parameter is intentionally a literal slash encoded to avoid being interpreted as a path separator.

All Tools

toolzy.dev / Encoders & Decoders / URL-Encoder

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URL Encoder/Decoder

Encode or decode URL-encoded text strings.

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