Free online URL encoder and decoder using encodeURIComponent/decodeURIComponent. Convert URLs and parameters containing spaces, non-Latin characters or special symbols into URL-safe form, or decode them back — entirely in your browser, nothing uploaded.
Uses encodeURIComponent/decodeURIComponent, fully in your browser — nothing is uploaded.
URLs only allow certain characters; Chinese, spaces, &, ? and # break the structure or get misread inside parameters. URL encoding converts them to a safe %XX form (a space becomes %20), so links, query parameters and tracking codes pass through intact instead of getting cut off.
Building a search link with Chinese keywords, assembling UTM tracking parameters, constructing an API query string, or decoding a long encoded URL someone sent to read the original — encoding and decoding both help. One mistyped character breaks the link, so let the tool handle it.
URL encoding just swaps in safe characters; anyone can decode it, so don't use it to hide secrets. For binary data use Base64, and for an irreversible hash use the SHA hash tool — these often appear together in a developer's workflow.
Spaces, non-Latin characters and symbols like ?, & and = can be misread by browsers or servers. URL encoding converts them to safe %XX form.
encodeURIComponent also encodes ?, &, = and /, making it right for a single parameter value. This tool uses encodeURIComponent, the most common choice for query parameters.
Yes, it uses UTF-8 so non-Latin characters encode and decode correctly.