Free Online URL Encoder

URL encoding replaces characters with special meaning in URIs — spaces, ampersands, hash signs, non-ASCII — with their percent-encoded equivalents per RFC 3986.

Your data is processed entirely in your browser and never sent to any server.

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How to Use This Developer Tool

  1. Paste text into the input area.
  2. Read the percent-encoded version in the output panel.
  3. Click Copy and paste into your URL or query string.

What Is an URL Encoder?

HTTP libraries usually handle URL encoding automatically, but the manual case shows up constantly: building an OAuth `redirect_uri`, constructing a deep link in a marketing email, pasting a search query into a redirect, or debugging why a request fails on the server.

The encoder runs input through `encodeURIComponent`, the most aggressive of the JavaScript options, which is the right choice for query-parameter values and form fields. Multi-byte UTF-8 (emoji, accented characters, CJK) is percent-encoded per byte, which matches what every modern server expects on the receiving end.

Frequently Asked Questions

When do I need URL encoding?
URLs can only contain certain characters. Spaces, symbols, and non-ASCII characters must be percent-encoded (e.g., space becomes %20) for valid URLs.
What's the difference between encodeURI and encodeURIComponent?
encodeURI preserves : / ? # [ ] @ ! $ & ' ( ) * + , ; =. encodeURIComponent encodes everything except - _ . ! ~ * ' ( ). Use encodeURIComponent for query values.
Does it handle Unicode?
Yes, Unicode characters are encoded as UTF-8 percent-encoded sequences. For example, é becomes %C3%A9.

Published by the WeGotEveryTool team. We build and test every tool in-house and update pages when the underlying spec, formula, or recommendation changes.

Reviewed: May 2026. Disclaimer: this tool is provided as-is for general informational use. For decisions with material consequences (medical, legal, financial, security) verify results against a qualified professional source.

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