URL Encoder & Decoder — Free Online

Encode strings for safe use in query parameters, or decode percent-encoded URLs. RFC 3986 compliant. Free.

How to Use URL Encoder & Decoder

Enter InputType or paste your input data into the tool interface

ProcessClick the action button to run the tool

Use OutputCopy or download the result for your project

URL Encoder & Decoder — Free Developer Utility

URL Encoder and Decoder — convert strings to percent-encoded URL format or decode encoded URLs back to readable text. URLs can only contain certain ASCII characters. Spaces, special characters, non-Latin letters, and most punctuation must be percent-encoded to be safely included in a URL. A space becomes %20, the hash symbol becomes %23, and an equals sign becomes %3D. Developers need url encode functionality constantly: building query strings manually, handling form data, constructing API requests with special characters, and working with file paths that contain spaces. Our tool implements RFC 3986 percent-encoding and correctly handles url decode of any valid percent-encoded string.

Keywords and Search Terms

Developers searching for this tool use terms like: url encode, url decode, percent encoding, url encoder decoder, encode url parameters. Tooliby provides this utility free with no signup, no watermarks, and no data logging.

Privacy — Your Data is Never Stored

Every input you paste into Tooliby developer tools is processed in memory and immediately discarded. We do not log inputs, store results, or analyze your data. Your code, tokens, API keys, and sensitive strings stay completely private.

Frequently Asked Questions

Any time you add user input or special characters to a URL as a query parameter. A search query containing spaces and punctuation must be url encoded before being appended to a URL.

Encode only the values of query parameters, not the URL structure itself. Encoding the entire URL including ?, =, and & would break the URL and make it unreadable by browsers and servers.

URL encode converts characters for safe use in URLs — spaces become %20. HTML encoding converts characters for safe rendering in HTML — < becomes <. They are used in completely different contexts.

HTML form submissions use application/x-www-form-urlencoded format where spaces become +. Standard RFC 3986 url encoding uses %20 for spaces. Our tool uses the RFC 3986 standard.

Letters A-Z and a-z, digits 0-9, hyphen, underscore, tilde, and period are unreserved characters and do not need encoding.