Developer & Security Tools • 100% Local Browser Memory

URL Encoder & Decoder

Percent-encode URLs and query values, or decode them back — instantly

Zero File Uploads In-Browser RAM Engine Complete Data Privacy

URL Encoder & Decoder

Percent-encode query values or full URLs for safe use in links and APIs. Runs in your browser.

Local Encoding

Scope:

Direction:

Text to percent-encode

Output

Query Value mode encodes every reserved character (used for values inside ?q=…). Full URL mode keeps :, /, ?, # and & intact and only encodes illegal characters.

AnyFileX Knowledge Graph Integration

Connected File Formats & Intelligence

Inspect with File Analyzer

Supported Input Formats

Target Output Formats

.TXT

Related Comparisons & Guides

Explore Format Comparisons

How to Use the URL Encoder & Decoder

Pick a Scope

Choose Query Value for parameter values, or Full URL when the structure must stay readable.

Encode or Decode

Convert your input and check the output instantly.

Copy

Copy the result straight into your link, code, or API call.

Technical Architecture

Client-Side Browser Processing Engine

How In-Browser Transformation Works

Query Value mode uses encodeURIComponent; Full URL mode uses encodeURI. Decoding prefers decodeURIComponent and falls back to decodeURI for strings that were encoded as full URLs.

Unlike legacy online converters that transmit entire files to third-party cloud servers, our architecture prevents network bottlenecks, provides near-instant processing, and eliminates cloud wait queues.

Zero-Knowledge Privacy Guarantee

Files never upload to remote servers or cloud storage
Temporary byte arrays in RAM are discarded upon tab close
No account registration or personal email required

Frequently Asked Questions

Use Query Value mode when you are building a value for a parameter (e.g. the search text in ?q=…) — every reserved character gets encoded. Use Full URL mode when the address itself must stay readable and only illegal characters should be encoded.

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