What's the difference between encodeURI and encodeURIComponent?

encodeURI leaves URL-reserved characters (like / : ? &) alone — use it on a full URL. encodeURIComponent encodes them — use it on values you're inserting into a URL.

When should I encode a URL vs. a URL component?

Encode the full URL when preserving an existing URL's structure. Use component encoding when building a URL with user-supplied values (e.g., search queries, callback URLs).

What characters are always safe in URLs?

Alphanumerics (A-Z, a-z, 0-9) and - _ . ~ are unreserved and never need encoding.

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URL Encoder / Decoder

Percent-encode or decode URLs and query parameters — full and component modes.

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About this tool

Encode strings for safe use in URLs (percent-encoding) or decode URL-encoded strings back to plain text. Two modes: full URL and component (encodeURIComponent).

How to use

1 Paste your URL or query parameter value into the input.
2 Choose mode: Full URL (encodeURI) preserves URL structure; Component (encodeURIComponent) encodes everything including & and =.
3 The encoded or decoded result appears instantly.
4 Click Copy to use the result.

Frequently Asked Questions

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