Does this URL tool upload my input?

No. Encoding, decoding, and query parsing run locally in your browser.

Should I encode a full URL or a component?

Use component mode for query parameter values and full URL mode when you want to preserve URL separators such as slashes and question marks.

Can this decode malformed percent encoding?

Malformed percent encoding is reported as an error so you can fix the input before using it.

Web Utility

URL Encoder / Decoder

Encode URL components, decode percent-encoded text, and inspect query strings locally. Useful for redirects, API calls, tracking links, and debugging copied URLs.

Input

Output

URL encoding examples and workflows

Use this URL encoder and decoder for query parameters, redirects, APIs, OAuth callback URLs, and copied links.

How to use this tool

Paste plain text, a URL component, or a full URL.
Choose encode or decode mode, then pick component or full URL handling.
Copy the transformed output or inspect parsed query parameters.

Real examples

hello world becomes hello%20world.
name=Lin & role=admin becomes name%3DLin%20%26%20role%3Dadmin in component mode.
Decode %E4%BD%A0%E5%A5%BD into readable UTF-8 text.

Common use cases

Prepare query parameter values for API calls.
Decode copied redirect URLs before debugging.
Inspect UTM, OAuth, SSO, and webhook parameters without sending them to a server.

Sample input/output

Input: hello world & tea=green.
Component output: hello%20world%20%26%20tea%3Dgreen.
Decode: turn q=hello%20world back into readable query text.

Common errors and fixes

URI malformed: check for a percent sign that is not followed by two hex characters.
Plus signs: many form-encoded query strings use + for spaces.
Double encoding: decode once before encoding again if you see repeated %25 sequences.

Edge cases table

Case	Best mode
One query value	Component mode, similar to `encodeURIComponent`.
Complete URL	Full URL mode, similar to `encodeURI`, preserves separators.
Emoji or Chinese text	Use UTF-8 percent encoding, then decode to confirm readability.

Edge cases / errors

Malformed percent escapes cannot be decoded safely.
Full URL mode preserves URL separators where possible.
Component mode encodes reserved characters more aggressively.

Related workflow

Decode a URL, then inspect encoded payloads with Base64 Encoder / Decoder.
Convert timestamp parameters with Timestamp Converter.
Use UUID Generator for callback state values in local test fixtures.

Use these tools for common developer data and identifier workflows.

Base64 Encoder / Decoder

Encode and decode UTF-8 text and small files.

UUID Generator

Generate and validate UUIDs for tests and fixtures.

Timestamp Converter

Convert Unix timestamps into readable dates.

CSV to JSON Converter

Convert pasted CSV into JSON locally.