Common use cases
- API debugging
- Decode parameters passed through webhook URLs or API calls.
- Tracking links
- Prepare campaign URLs with safe encoded values.
- Form validation
- Check how user input is represented inside URLs.
Development · free tool
URL encoder and decoder for query strings, APIs and redirects
Encode or decode URLs, query strings and percent-encoded text.
Your tool
URL Encoder / Decoder
Use it well
How to use URL Encoder / Decoder
Steps
- Paste readable text or an encoded URL.
- Edit either side of the converter.
- Review the decoded or encoded output.
- Copy the safe URL value.
Limits and good practices
Good practices
- Use realistic test values when validating forms, exports or API payloads.
- Keep real customer, banking and production secrets out of public tools.
- Check the output format before copying it into a production workflow.
- Document whether a value is generated, validated, converted or only estimated.
Common mistakes
- Confusing valid format with real-world validity
- A generated or locally validated value can match a format without proving that it exists in an official system.
- Using real production data
- Public utilities are best for test data, demos, fixtures, QA and quick checks, not for confidential values.
FAQ
Frequently asked questions
What is URL encoding?
URL encoding replaces reserved characters with percent-encoded values, for example spaces can become %20.
When should query parameters be encoded?
Encode query parameters when they contain spaces, symbols, accents, URLs or other reserved characters.
Is URL encoding encryption?
No. URL encoding is reversible formatting, not a security mechanism.
Are my inputs sent to a server?
OnSubmit tools run in the browser whenever the task can be processed locally. Avoid pasting production secrets, real banking details or personal data into public tools.