URL Encoder / Decoder
Convert plain text or URLs to percent-encoded form and decode them back. Great for query strings and redirects.
Input
Result
Why use a URL encoder and decoder?
The URL encoder converts unsafe characters such as spaces, ampersands and question marks into a safe, percent‑encoded format that browsers and servers understand. Use it when you build UTM tracking links, sign OAuth redirect URIs or include user‑generated text in a query string. The URL decoder reverses the process so you can quickly read and debug existing encoded URLs.
This simple online URL encoder / decoder runs entirely in your browser and does not log the links you paste into the text area. You can keep the tool open while working on marketing campaigns, webhook endpoints or API clients and copy the encoded result directly into your code, email or analytics platform.
Typical use‑cases
- Create campaign URLs with
utm_sourceandutm_mediumparameters. - Encode callback URLs when integrating OAuth or SSO providers.
- Debug 400‑errors caused by malformed query strings in APIs.
- Clean up links before sharing them in email newsletters or chat apps.
Best practices for encoded URLs
When you generate links for users, always encode dynamic parts such as search terms or IDs. This prevents broken URLs and protects against accidental injection of reserved characters. With this encoder you can visually confirm that the encoded version still represents the original text before shipping it to production.