Developer Utilities

Paste your URL or string into the URL encoder. It automatically converts special characters (spaces, ampersands, equals signs) into percent-encoded format (e.g., space becomes %20) safe for use in URLs.

Paste your percent-encoded URL (e.g., hello%20world%3F) into the URL decoder. It converts it back to readable text (hello world?).

Enter your regex pattern and test string in the Regex tester. Matches highlight in real-time as you type. You can also see capture groups, global matches, and whether the pattern is valid.

Paste your text into the Base64 encoder. The tool instantly generates the Base64-encoded version. This is commonly used for encoding credentials in HTTP headers or encoding binary data in JSON.

URLs can only contain certain ASCII characters. Special characters like spaces, &, =, ?, and # have special meanings in URLs. URL encoding converts these to percent-encoded format so they're transmitted correctly in HTTP requests.

Paste the full URL or just the query string (e.g., ?name=John%20Doe&city=New%20York) into the URL decoder. It converts all percent-encoded characters back to readable text, making it easy to inspect API URLs, OAuth redirect parameters, or tracking query strings.

No. URL, Base64, and regex operations all run locally in your browser.

Yes — you can toggle common flags like global and case-insensitive and see matches update live.