Encoding

URL Encode / Decode

Percent-encode text for safe use in URLs, or decode a percent-encoded string.

NewAPI Ready

Focused calculator

Calculate URL Encode / Decode

name%3DTom%20%26%20Jerry%2F100%25

Percent-encoded

Guide & details

When to use this tool

Use the URL Encode / Decode for quick, focused data cleanup directly on the page before copying the output into code, documentation, spreadsheets or another tool.

Developer, SEO, analytics and content workflows where text needs to be encoded, decoded or normalized safely.
Cleaning a value before pasting it into a URL, HTML page, config file or API request.
Checking privacy notes before using sensitive text such as tokens or copied session data.

Accuracy, privacy and assumptions

Encoding changes representation, not meaning. Decoding untrusted input can reveal unsafe HTML, URLs or scripts.
Browser-only tools keep input local; API-enabled tools can also be called programmatically for non-sensitive data.

Common mistakes to avoid

Most wrong answers from a URL Encode / Decode come from unit direction, rounding too early, or copying a result without its original context.

Do not assume encoding encrypts data. Base64, URL encoding and HTML entities are reversible representations.
Decode untrusted strings carefully because the output can contain scripts, markup or control characters.
For private tokens or session strings, prefer browser-only tools and avoid unnecessary sharing.

Copy-ready result format

URL Encode / Decode output: name%3DTom%20%26%20Jerry%2F100%25 (Percent-encoded).

Keep the original input available until the destination accepts the transformed output.
Copy validation errors along with the input when debugging a failed import.
Use browser-only pages for sensitive copied text or account-like payloads.

Best workflow for URL Encode / Decode

Paste or type the input into the tool above.
Choose the target mode or format when the tool offers one.
Review validation errors and copy the output only after it matches the expected structure.
For sensitive data, prefer browser-only tools and avoid API-enabled endpoints.

Next steps after this result

After the immediate calculation, choose the next tool based on what you plan to do with the value.

Copy the transformed output into the destination and test it there.
Keep a copy of the original input.
Use browser-only pages for sensitive values.

Base64 Encode / Decode HTML Entity Encode / Decode Full unit converter Batch converter API docs

Formula

How it works: Reserved and non-ASCII characters are replaced with % followed by their UTF-8 byte values in hexadecimal. Decoding restores the original characters.

Common examples

Input	Result
a b → encode	a%20b
%2F → decode	/
encode: &=?	%26%3D%3F

JSON API example

POST a JSON body to the public endpoint.

curl -X POST https://api.convematik.com/url-encode \
  -H 'Content-Type: application/json' \
  -d '{"text": "a b", "mode": "encode"}'

{
  "result": "a%20b"
}

Common questions

What does the URL Encode / Decode do?

Percent-encode text for safe use in URLs, or decode a percent-encoded string.

Does the URL Encode / Decode send my data to a server?

The URL Encode / Decode runs locally in your browser for instant results, and the same transform is also available as a public JSON API endpoint.

When should I use the URL Encode / Decode instead of a spreadsheet or script?

Use the URL Encode / Decode for quick validation, formatting, decoding or cleanup when you need a deterministic output before copying the result into code, docs, an API request or a spreadsheet.

Is the URL Encode / Decode free to use?

Yes. The URL Encode / Decode is free and does not require an account.