URL Encoder / Decoder

Encode and decode URLs and query parameters

URL Encoder / Decoder is a secure developer utility built to encode and decode urls and query parameters. Developers frequently handle sensitive tokens, JSON configs, and code blocks; this tool processes all text manipulations entirely offline, preventing leaks.

How to use URL Encoder / Decoder

  1. Enter Inputs. Input your data, values, or upload your file into the provided container panel.
  2. Configure Options. Adjust sliders, selectors, or toggles to customize your desired output parameters.
  3. Verify Live Preview. Review the instant calculation or visual representation generated in real-time.
  4. Export Result. Click the Copy or Download button to save your formatted output.

Features

  • Offline Processing: Computes operations instantly in your local browser client.
  • One-Click Copy: Instantly copy inputs or outputs to your clipboard.
  • Precision Outputs: Processes inputs immediately to provide clean, error-free results.

Why use this tool

  • Zero Leakage: Perfect for formatting sensitive client data, secrets, or API response configurations.
  • Debugging Assistance: Spots exact syntax errors and formatting issues with helper highlights.
  • Productivity Booster: Simple hotkeys and one-click operations speed up debugging workflows.

Frequently asked questions

What is URL encoding (percent encoding)?

URL encoding replaces characters that are not allowed or have special meaning in a URL with a percent sign and two hex digits. A space becomes %20 and & becomes %26. Non-ASCII characters are first converted to UTF-8 bytes, so e-acute becomes %C3%A9.

What is the difference between encodeURI and encodeURIComponent?

encodeURIComponent encodes almost everything, including / ? & = # and :, so it is right for a single query value. encodeURI leaves those structural characters alone so a whole URL stays usable. In this tool, Encode All Characters uses encodeURIComponent and turning it off uses encodeURI.

How do I decode a URL with %20 in it?

Switch to Decode, paste the URL and the percent codes are converted back, so %20 becomes a space and %26 becomes &. If you see a URI malformed error, the text contains a stray % that is not followed by two hex digits, or an invalid UTF-8 sequence.

Should a space be %20 or a plus sign?

In a URL path, use %20. A plus sign means a space only in form-style query strings (application/x-www-form-urlencoded). This tool follows JavaScript, so it produces %20 for spaces and leaves a plus as %2B when encoding all characters.

Which characters are not encoded?

With encodeURIComponent behaviour, letters, digits and the characters - _ . ! ~ * ' ( ) are left as they are. Everything else is percent-encoded. With encodeURI behaviour the reserved characters ; , / ? : @ & = + $ # also stay unchanged.

Why does my link break when I encode the whole URL with Encode All on?

Encoding a full URL with encodeURIComponent also encodes the colon and slashes, so https://example.com becomes https%3A%2F%2Fexample.com, which is no longer a clickable link. Encode only the query values with Encode All, or encode a whole URL with that option turned off.

Is my data shared when using the URL Encoder / Decoder?

No. Toolskyt operates under a zero-server policy. All calculations, data formatting, and file exports are executed locally on your machine.

Do I need to sign up or pay to use the URL Encoder / Decoder?

No, this tool is 100% free. There are no limits, sign-ups, subscriptions, or hidden charges required.

Is it safe to paste API tokens or private JSON data here?

Yes, absolutely. The tool executes 100% inside your local browser memory space. No inputs are sent to any servers.

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