How do I URL encode a query parameter value?

Paste the text, set Encoding mode to Component, and press Encode. Component mode escapes all reserved characters such as &, = and /, which is what a single parameter value needs.

What is the difference between Component, Full URL and Form data modes?

Component escapes every reserved character. Full URL keeps :, /, ?, & and = intact so a whole URL stays usable. Form data works like Component but writes spaces as +.

Why does decoding fail with a percent sign error?

A stray % not followed by two hex digits is not valid percent-encoding. Invalid sequences are left as-is and counted, and a decode error message appears if the whole string cannot be read.

Can I decode links from older sites that use a different character set?

Yes. The Character set option defaults to UTF-8 and also offers other sets. The tool suggests one when a link may come from an older Russian, Turkish, Japanese, Chinese or Korean site.

How can I break a URL into its parts or remove tracking parameters?

Use Parse Query String to list each parameter, or the URL breakdown to see scheme, host, path and fragment. You can then remove tracking parameters such as utm_*, fbclid and gclid and copy the rebuilt URL.

Yes. Every tool is free to use, with no account and no credit card. The work runs on your device rather than on our servers, which is what keeps it free to run.

Does it work on mobile?

Yes. It runs in current mobile browsers on iOS and Android, with nothing to install.

🔗

Free URL Encoder & Decoder

Encode and decode URLs and query strings. Supports encodeURIComponent, decodeURIComponent, and query string parsing.

Runs in your browserNo sign-up, no pop-upsNo login requiredFree forever

Works offline once loaded

Encoding mode

Encodes every reserved character — best for query values and path segments.

Character setEach line separately

Common uses

Encode URL Parameters for APIsSafely encode query string parameters before appending them to API request URLs.
Encode URLs for Email LinksCreate click-safe links for email campaigns — encode special characters so links survive every email client.
Encode URLs for Social SharingPrepare URLs with pre-filled text, hashtags, and links for Twitter, Facebook, and LinkedIn share buttons.
Encode Complex Query StringsBuild and encode query strings with multiple parameters — ready to append to any URL.
Encode URLs for Webhook CallbacksEncode callback URLs that are passed as parameters to third-party services and OAuth flows.

How It Works

URL encoding and decoding here runs entirely in your browser using JavaScript's built-in globals — encodeURIComponent, encodeURI, and decodeURIComponent — with no third-party library and no network request. The tool also exposes the browser's native URL API to parse and display query string parameters as a key-value table.

1
Choose an encoding mode
Three modes map to real-world use cases: "Component" calls encodeURIComponent and escapes everything except unreserved characters — the right choice for individual query values. "Full URL" calls encodeURI and leaves the scheme, slashes, and domain intact. "Form" uses encodeURIComponent then swaps %20 for + to match the application/x-www-form-urlencoded format sent by HTML forms.
2
Encode or decode in one click
Encoding passes your text through the selected function and displays the percent-encoded result. Decoding calls decodeURIComponent (with + converted to spaces in Form mode). Malformed percent-sequences — like a stray %E0 with no continuation byte — are caught and reported as an inline error rather than crashing.
3
Parse query strings with the URL API
The "Parse params" action wraps your input in the browser's native URL constructor and iterates url.searchParams to extract each key-value pair. If the URL constructor rejects the input, a hand-written fallback splits on & and = and runs each token through safeDecode, so partial or raw query strings still produce a readable table.
4
Copy the result
The encoded or decoded text appears in a monospace output block. A copy button writes it to the clipboard via the Clipboard API. Nothing leaves your device at any point.