What is the difference between Encode URL and Encode Component?

Encode URL (encodeURI) is used for full URLs — it leaves characters like : / ? and & intact so the URL remains functional. Encode Component (encodeURIComponent) is used for individual pieces of data you're putting into a query parameter — it encodes almost every non-alphanumeric character. For API requests where you're passing a URL inside another URL, you should almost always use Encode Component.

Is it safe to encode sensitive data like API keys?

This tool is 100% client-side. Every operation happens in your browser's JavaScript engine. No data is sent to our servers, logged, or stored. It is as safe as running a script on your own machine. However, always remember that URL encoding is not encryption — it's just a format change. Anyone who receives an encoded string can decode it instantly.

Why do my spaces become %20 and not +?

The standard percent-encoding specification (RFC 3986) uses %20 for spaces. Some older systems or specific form-encoding standards use +, but %20 is the universally accepted standard for modern web development, browsers, and APIs. This tool follows the RFC 3986 standard for maximum compatibility.

Can I decode a URL that was double-encoded?

Yes. If a string has been encoded twice (e.g., a space became %20 and then %2520), just paste it into the decoder, click Decode once to get the first level back, then copy that result and paste it back in to decode again. This is common when troubleshooting complex API redirects or proxy configurations.

⚡ Speed Up Workflow⚡ Workflow

URL Encoder & Decoder Online

Instant Percent-Encoding and Decoding for URLs and Query Strings.

Source String

Transformed Result

Waiting for transformation...

Encode and Decode URLs for Safe Web Transport

Browsers can only transmit a limited set of characters in a URL. Special characters like spaces, symbols, and non-ASCII characters have to be converted into a safe "percent-encoded" format. If you're building API calls, working with query parameters, or managing redirects, you need a reliable way to encode and decode these strings instantly.

This tool provides two essential encoding methods: **Encode URL** (encodeURI) for full web addresses, and **Encode Component** (encodeURIComponent) for individual parameters. It's completely free, requires no signup, and runs 100% in your browser — your data never leaves your device.

Quick Overview

Paste any string — raw URLs, query parameters, or plain text with special characters.
Choose your mode — encodeURI for full URLs, encodeURIComponent for individual parameter values.
Get instant output — the encoded result appears immediately, no page reload.
Copy in one click — use the result directly in API requests, HTML attributes, or config files.
No signup, no server — the entire process runs in your browser; nothing is stored.

Real-World Use Case

Priya, a backend developer, was integrating a third-party analytics API. The API expected a redirect_url parameter, and the destination URL itself contained query parameters — which meant ?, =, and & all needed to be encoded. She pasted the URL into Utilx, used encodeURIComponent, and got the result in seconds.

Private & Secure

All encoding and decoding happens in JavaScript on your device. Nothing is sent to any server — your data stays yours. This makes it safe for processing sensitive strings, paths, or tokens.

LOCAL COMPUTE PROTOCOL

Instant Processing

Results update as you type — no submit button, no page reload.

Dual Modes

Switch between URI and URIComponent modes depending on your use case.

Zero Server Logs

Runs entirely in JavaScript. No data is sent to any server.

RFC 3986 Standard

Follows modern web standards for percent-encoding compatibility.

Operational Workflow

CHOOSE DIRECTION

Select Encode to convert text to URL format, or Decode to convert back to plain text.

SELECT METHOD

Use Component for individual parameters or URL for complete web addresses.

PASTE INPUT

Paste your string into the input box. Output appears instantly as you type.

COPY & USE

Grab your result with one click and drop it directly into your code or request.

When to Use This Tool

Handling special characters in URLs requires precision. Use this tool for API integrations, form data, and redirect rules.

API Parameters

Encode search queries, email addresses, or nested URLs before appending them to your endpoint.

URL Redirects

Get correctly encoded paths for Nginx, Apache, or CDN redirect rules involving special characters.

Ecosystem Support

Base64 Encoder

Base64 encode for safe transport of data in API payloads.

JSON Formatter

JSON formatter for API responses — clean up your decoded payloads.

Regex Tester

Bulk string replacement and pattern matching for URL parameters.

Privacy Statement

This tool runs 100% in your browser — no data is sent to any server, logged, or stored anywhere. Your input never leaves your device.

Browser Compatibility

Works in all modern browsers — Chrome, Firefox, Safari, and Edge — on desktop and mobile. No installation required.

FAQs

URL encoding, or percent-encoding, is a way to represent characters that have special meanings in URLs (like ?, &, =, and spaces) so they can be safely transmitted across the web. Special characters are replaced with a '%' followed by two hexadecimal digits representing their UTF-8 character code. For example, a space becomes %20 and an ampersand becomes %26.

Data & Docs