What does a URL encoder decoder do?

A URL encoder converts special characters like spaces, ampersands, and hashes into percent-encoded sequences so they travel safely in a URL. A URL decoder reverses this. This tool does both.

Is this URL encode decode tool free?

Yes, completely free with no account required. The URL encoder decoder runs entirely in your browser.

What characters need to be encoded in a URL?

Spaces, &, =, ?, #, %, +, /, :, @, [ and ] must be percent-encoded when used as data. Non-ASCII characters must also be encoded.

URL Encoder Decoder Online

🔗 Developer Tools ✔ Free Forever

URL Encoder Decoder Online Free

Encode special characters for URLs or decode percent-encoded strings instantly. Supports query strings, path segments, batch mode, and live preview. Everything runs in your browser.

✔ Encode & decode URLs ✔ Query string + path modes ✔ Live encode toggle ✔ Batch URL processing ✔ Highlight % sequences ✔ 100% browser based

All Developer Tools

Input

Try: URL with spaces Query params Encoded URL

Live Highlight

output

Result

Paste URLs (one per line)

Results

Common URL encoding rules Spaces become %20 (or + in query strings). Special characters like &, =, ?, #, /, : are encoded in most contexts. Safe characters (letters, digits, -, _, ., ~) are never encoded.

Character	Encoded	Notes

About This Tool

Why Use a URL Encoder Decoder Online

URLs can only contain a limited set of ASCII characters. Any space, ampersand, hash, or non-ASCII character must be converted to a percent-encoded sequence before it can travel safely across the internet. This URL encoder decoder online handles that conversion in both directions.

The encoder supports three modes: full encodeURIComponent, query string encoding where spaces become +, and path-segment mode that preserves forward slashes. The decoder handles both formats automatically.

Use batch mode to encode or decode entire lists of URLs at once, handy when processing API responses, cleaning data exports, or working with redirect tables.

What this URL encoder decoder does

Encode URLs using encodeURIComponent or query string (+) mode

Decode any percent-encoded string back to plain text

Live mode encodes or decodes as you type

Highlights percent sequences in yellow for quick scanning

Batch mode: process multiple URLs line by line

Full character reference table with every encoding rule

How to use the URL encoder decoder

Paste your text

Type or paste a URL, query string, or any text containing characters that need encoding.

Choose a mode

Select full encode, query string mode, or path mode depending on where your URL will be used.

Encode or decode

Click Encode or Decode. The result appears instantly with percent sequences highlighted.

Copy the result

Click Copy, or use the swap button to feed the output back as new input for chained operations.

Common Questions

FAQ: URL Encoder Decoder Online

A URL encoder converts special characters like spaces, ampersands, and hashes into percent-encoded sequences (e.g. space becomes %20) so they travel safely in a URL. A URL decoder reverses this, turning %20 back into a space. This tool does both.

encodeURIComponent encodes everything except letters, digits, and the characters – _ . ~ . It is the safest choice for encoding individual query parameters or path values. This URL encoder decoder uses encodeURIComponent by default, which matches what JavaScript’s native function does.

In path segments, a space encodes to %20. In query strings, it can also be represented as a + sign. Use the query string mode in this URL encoder if you are building query parameters. Use full encode mode for paths and fragments.

Yes, completely free with no account or signup required. The URL encoder decoder runs entirely in your browser, so your data never leaves your device.

Characters including spaces, &, =, ?, #, %, +, /, :, @, [ and ] must be percent-encoded when used as data rather than URL structure. Non-ASCII characters like accented letters, Chinese, Arabic, or emoji must also be encoded. The Reference tab in this tool lists every common encoding.

Yes. Switch to Batch Mode, paste one URL per line, choose encode or decode, and click Process All. The results appear in the output area ready to copy. Useful for processing redirect logs or data exports with many encoded URLs.