Base64 URL Encoder
Encode text to URL-safe Base64.
What Is a Base64 URL Encoder?
The Base64 URL Encoder converts text into URL-safe Base64 (RFC 4648 §5), which replaces '+' with '-' and '/' with '_' and strips the padding '=' characters. This variant can be safely placed in URLs and query strings without escaping. This free online tool is useful for Base64 URL encoder, Base64url encoder, URL-safe Base64. Common use cases include JWTs, OAuth tokens, signed URLs, cookies, and URL parameters. It is designed for quick browser-based hashing, encoding, decoding, encryption testing, checksum comparison, identifier generation, and cryptography education. For production security, follow the algorithm's current standards, key-management requirements, and application-specific security guidance.
How to Use This Base64 URL Encoder
- 1Choose the operationSelect encode or decode according to the data you have.
- 2Paste the inputEnter the text or Base64 value into the input field.
- 3Check the formatFor Base64url, use the URL-safe '-' and '_' alphabet.
- 4Review the resultThe converted data appears immediately in the browser.
- 5Copy the outputUse it in your API test, JWT inspection, data URI, or development workflow.
Frequently Asked Questions
Standard Base64 uses '+' and '/' which must be percent-encoded in URLs. URL-safe Base64 swaps them for '-' and '_' and removes padding, producing strings that are valid URL characters.
It is used in JWTs, OAuth tokens, signed URLs, cookies, and anywhere Base64 data must live inside a URL without further encoding.