BrowserTools

URL Encoder / Decoder

Percent-encode or decode URLs and params

100% Private & In-Browser

Processed locally using client-side JavaScript. Your files and data never touch any server.

Instant & Unlimited

No registration, no waiting queues, and no limits on file conversions or generations.

Tool Overview & Guide

What is URL Encoder / Decoder?

The URL Encoder / Decoder performs bidirectional percent-encoding and decoding on website URLs, URI parameters, and query strings in full compliance with RFC 3986. It converts unsafe ASCII and non-ASCII Unicode characters into %HH hexadecimal escape sequences to ensure links transmit reliably across HTTP requests without breaking server parsers.

Step-by-Step Instructions

How to use URL Encoder / Decoder

1

Choose Encode mode to sanitize strings or Decode mode to reveal human-readable text.

2

Select your encoding scope: full encodeURI (preserves URL separators like ://, /, ?) or encodeURIComponent (escapes all reserved characters).

3

Paste your URL or parameter string into the input area.

4

The browser's UTF-8 URI engine computes the percent-encoded or decoded string in real time.

Key Capabilities
  • Full RFC 3986 compliance with UTF-8 multi-byte character support
  • Dual mode: encodeURIComponent (full parameter) and encodeURI (path preservation)
  • Instant two-way toggle and one-click clipboard copying
  • 100% private in-browser transformation with zero server logging
Common Use Cases
  • Sanitizing query parameter values containing spaces, ampersands, and slashes before appending to API URLs.
  • Decoding obfuscated redirect links, tracking URLs, and deep links for security auditing.
  • Formatting non-Latin characters (Cyrillic, Arabic, Chinese, emojis) for safe web transmission.
Clear Answers

Frequently Asked Questions

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