Base64 Encode a URL
Base64 encode a URL to pass it safely as a parameter, hide it from casual reading or store it in a single token. Use Base64URL for safer links.
Part of the free Base64 Encoder. Runs in your browser — nothing is uploaded.
Base64 Encode a URL
Encoding a full URL with Base64 lets you carry it inside another URL without worrying about ?, & and # characters. For use in links, prefer the URL-safe variant so no further escaping is needed.
Worked example: A URL with query string
URL
https://example.com/path?x=1&y=2#top
Encodings
standard: aHR0cHM6Ly9leGFtcGxlLmNvbS9wYXRoP3g9MSZ5PTIjdG9w url-safe: aHR0cHM6Ly9leGFtcGxlLmNvbS9wYXRoP3g9MSZ5PTIjdG9w
Practical tip
If you only need to put a URL in a query parameter, percent-encoding (encodeURIComponent) is simpler and keeps links readable.
How to use this Base64 Encoder
- 1Use the live tool above — it runs entirely in your browser and never uploads your data.
- 2Paste the sample from the worked example, or use your own input.
- 3Copy the result, then adapt the same steps in your editor, script, or pipeline.
Base64 Encode a URL FAQs
Is Base64 or percent-encoding better for URLs inside URLs?
Percent-encoding is standard and readable. Use Base64URL only when you need an opaque token or to avoid double-encoding issues.
Does Base64 protect a URL from being read?
No. It only obscures it. Anyone can decode Base64 in a second.
More Base64 Encoder pages
- Encode a String to Base64Encode any text string to Base64 online. Paste your text and copy the result instantly. Supports UTF-8, free and processed in your browser.
- Base64 Encode UTF-8 Text and EmojiEncode Unicode text, accents and emoji to Base64 correctly. Avoid the btoa "Invalid character" error by encoding as UTF-8 first.
- Base64URL Encoder (URL-Safe Base64)Encode text to URL-safe Base64 (Base64URL) with - and _ instead of + and /, and no padding. The format used in JWTs and URLs.
- HTTP Basic Auth Header GeneratorGenerate an HTTP Basic Authorization header by Base64-encoding username:password. Build the header for curl, fetch and Postman.
- Encode JSON to Base64Encode a JSON object to Base64 for headers, query strings and config values. Paste JSON and copy the encoded string. Free and local.
- Base64 Encode in JavaScriptEncode a string to Base64 in JavaScript with btoa() in the browser or Buffer in Node.js. Check your result with the encoder before shipping.
- Base64 MIME Encoding With 76-Character LinesMIME Base64 wraps lines at 76 characters. See what wrapped output looks like for email attachments and PEM-style data.
- Base64 Encode in PythonEncode a string to Base64 in Python with base64.b64encode. Remember to encode to bytes first and decode the result. Verify with the online encoder.
- Base64 Encoding Without PaddingEncode to Base64 without = padding characters. See when padding is optional, how to add it back, and why JWTs omit it.