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URL Encode/Decode

Encode URL strings for safe transport or decode them back to readable text.

Encode URL strings for safe transport or decode them back to readable text.

Quick start: Paste a URL, query parameter value, or any string that needs percent-encoding into the input area. → Click 'Encode' to convert special characters to their %xx equivalents, or 'Decode' to reverse the process. → Review the output — all reserved and unsafe characters are properly escaped.

How to use URL Encode/Decode

  1. 1

    Paste a URL, query parameter value, or any string that needs percent-encoding into the input area.

  2. 2

    Click 'Encode' to convert special characters to their %xx equivalents, or 'Decode' to reverse the process.

  3. 3

    Review the output — all reserved and unsafe characters are properly escaped.

  4. 4

    Click the copy button to place the result on your clipboard.

Real examples of URL Encode/Decode in action

Encode query value with spaces
Before
hello world & friends
After
hello%20world%20%26%20friends
Decode broken UTM link
Before
utm_campaign=spring%2Bsale%26launch
After
utm_campaign=spring+sale&launch
Unicode in a URL
Before
résumé.pdf
After
r%C3%A9sum%C3%A9.pdf
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Who is URL Encode/Decode for?

Web developers building query strings programmatically for API requests

Marketing analysts inspecting encoded UTM parameters in tracking URLs

QA engineers constructing test URLs with special characters like spaces and ampersands

Customer support reps decoding mangled URLs from user bug reports

Mobile developers encoding deep-link parameters for iOS and Android app URLs

Why use URL Encode/Decode?

  • Reliable percent-encoding using encodeURIComponent — the correct function for encoding individual parameter values.
  • Full Unicode support — non-Latin characters, emoji, and special symbols are encoded correctly.
  • Instant encoding and decoding with no network requests.
  • One-click copy makes it easy to paste encoded values into URLs, code, or configuration files.

Common use cases

  • Debug broken query strings by decoding percent-encoded URLs to see the actual parameter values.
  • Build deep-links with properly encoded parameters that contain special characters like &, =, and spaces.
  • Inspect tracking URLs from marketing campaigns to verify UTM parameters are correctly encoded.
  • Encode user-generated content before inserting it into URL parameters in application code.

How URL Encode/Decode keeps your data private

Percent-encoding runs through JavaScript's native encodeURIComponent inside your browser — strings are transformed and returned without touching any server. Analytics URLs with customer emails, session IDs, or personal identifiers stay completely private during encoding or debugging.

How URL Encode/Decode compares to alternatives

Honest comparison to other popular options — pick the right tool for the job.

ToolMain limitation
URLDecoder.orgRuns server-side, which is risky for URLs containing session IDs or emails
DevUtils (Mac app)Paid macOS-only app that requires installation
Browser devtoolsRequires opening console and running snippets by hand every time
URL Encode/DecodeFree, runs in your browser, no sign-up, no watermarks, no file-size limits beyond your device memory.

Limitations & things to know

  • Uses encodeURIComponent — encodes all special characters including slashes
  • Does not encode full URLs — use for individual parameter values

About URL Encode/Decode

URL encoding converts special characters into percent-encoded equivalents so they can travel safely through query strings, headers, and URL paths. Xevon Tools' URL Encode/Decode tool wraps JavaScript's encodeURIComponent and decodeURIComponent in a clean, developer-friendly interface. This is the correct encoding function for individual parameter values — it escapes all reserved characters including ampersands, equals signs, and slashes that would otherwise break URL parsing. Unicode characters, emoji, and non-Latin scripts are all handled correctly. The tool is invaluable for debugging broken query strings, building deep-links with special characters, inspecting marketing tracking URLs, and encoding user input before inserting it into URL parameters. Everything runs in your browser with no server requests, so sensitive data like API keys or user information stays private. Whether you are a front-end developer building URLs programmatically or a marketer inspecting campaign links, this tool makes percent-encoding quick and reliable.

Frequently asked questions

encodeURI encodes a full URL but preserves characters like : / ? # that have meaning in URLs. encodeURIComponent encodes everything, which is the right choice for individual parameter values. This tool uses encodeURIComponent.
The %20 encoding is the standard for URLs (RFC 3986). The + encoding for spaces is specific to the application/x-www-form-urlencoded format. This tool uses the standard %20 form.
This tool is designed for encoding individual values, not full URLs. If you encode a full URL, the slashes and colons will also be encoded, which is usually not what you want. Encode only the parameter values.
Yes. Encoding and decoding happen entirely in your browser using built-in JavaScript functions. Nothing is sent to a server.

Your files never leave your device

Every tool on Xevon Tools runs 100% in your browser. No uploads, no servers, no tracking. Free forever.

Learn more

Embed URL Encode/Decode on your site

Add this tool to your own website, blog, or internal tool page with one line of code. Free to use, no attribution required (but appreciated).

<iframe src="https://www.xevontools.com/embed/url-encode-decode" width="100%" height="640" style="border:1px solid #e2e8f0;border-radius:12px;" title="URL Encode/Decode — Xevon Tools"></iframe>
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