WebToolsHub Client-Side

URL Encode & Decode Online

Encode and decode URLs, query parameters, and special characters safely.

Interactive Tool Workspace

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Processing Limits & Device Capabilities

Executes standard RFC 3986 URI percent-encoding locally in browser memory. Unlimited input length without server roundtrips.

Zero Cloud Transmission: Zero bytes are uploaded to any server. File handling is constrained only by available device RAM.

How to Use URL Encode & Decode

  1. Enter or paste a URL or parameter string into the input area.
  2. Click
  3. to percent-encode query strings or
  4. to restore readable text.
  5. Copy the output result with one click.

About URL Encode & Decode

URL Encode & Decode provides standards-compliant RFC 3986 percent-encoding and decoding for query strings, API parameters, and web addresses. Special symbols, whitespace, and non-ASCII characters are safely converted into percent triplets (%20, %26) in browser memory with zero network requests.

Frequently Asked Questions

What is URL percent-encoding?

Percent-encoding represents characters outside the standard unreserved ASCII set as a percent sign followed by their two-digit hexadecimal byte value (for example, spaces become %20 and ampersands become %26).

Which characters are encoded by this tool?

The tool uses standard encodeURIComponent() to encode all characters except: A-Z, a-z, 0-9, hyphen (-), underscore (_), period (.), exclamation mark (!), tilde (~), single quote (\

Does this tool support emojis and non-Latin UTF-8 characters?

Yes. Multi-byte Unicode characters, accented letters, and modern emojis are encoded into consecutive UTF-8 percent-encoded bytes (for example, 🔥 becomes %F0%9F%94%A5) and decoded back losslessly.

What causes a URI malformed error during decoding?

A malformed URI error occurs when a percent sign (%) is followed by invalid hexadecimal characters or incomplete multi-byte sequences. Ensure all percent signs are valid escape sequences.

Is my URL or parameter data sent to any server?

Never. All encoding and decoding execute client-side using native JavaScript URI functions in local memory. No URLs, tokens, or queries are logged or transmitted.

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