FJ Tools

URL Encoder/Decoder

Safely encode or decode URLs with one click.

URL Encoder / Decoder

Output

About URL Encoder / Decoder
The URL Encoder / Decoder is a lightweight web tool to quickly encode and decode strings for use in URLs, query parameters, and web forms. It handles percent-encoding (percent-escape) rules, ensuring reserved characters are safely encoded so they can be included in query strings, or decoded back into human-readable form. This is indispensable for web developers, SEO specialists, and anyone who shares or debugs URL parameters.
Key features
  • Encode text for safe inclusion in URLs and query params.
  • Decode percent-encoded strings back to readable text.
  • One-click copy and privacy-first client processing.
  • Clear error handling for malformed encodings.
  • Mobile-ready UI for quick on-the-go usage.
When to use
Use the encoder when constructing links with query parameters that include spaces, punctuation, or user input. Use the decoder when inspecting incoming parameters or debugging URLs copied from browser address bars or server logs. Correct encoding prevents bugs and security issues arising from misinterpreted characters in URLs.
FAQ
Will this break my URL if I double-encode?
Double encoding will change the representation of reserved characters; always encode only once before insertion into the URL and decode once when reading back.
Is this safe for passwords or tokens?
The tool performs encoding/decoding locally in your browser and does not transmit data to servers. However, avoid pasting highly sensitive secrets into online tools unless you control the environment.
SEO benefit
Detailed, crawlable content and structured metadata helps the page rank for queries such as "url encoder", "encode url online", "decode url", and specific param encoding problems.
High-value keywords
url encoder, url decoder, encode url online, percent-encoding, decode url, encodeURIComponent