• 100% Free
  • No Sign-Up
  • No Credit Card
  • No Free Trial
  • No Pro Tier
  • No Watermarks

Nothing is uploaded. Just open it and start.

Base64 & URL encoding, without leaving your browser

Paste text, watch it encode or decode live, and switch between Base64 and URL encoding in one click. No sign-up, no watermarks, nothing between you and your data.

Base64 encode & decode

Convert plain text to Base64 and back, with full UTF-8 support for unicode and emoji.

URL encode & decode

Percent-encode text for safe use in query strings and URLs, or decode it back to plain text.

Live, both directions

Output updates as you type. Swap input and output with one click to check a round trip.

100% private, 100% client-side

Your text never leaves your browser. There's no server round trip, ever.

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Frequently asked questions

What's the difference between Base64 and URL encoding?
Base64 turns arbitrary text or binary data into a compact set of letters, digits, +, /, and = — commonly used for embedding data in JSON, JWTs, or data URIs. URL (percent) encoding escapes characters that aren't safe inside a URL, like spaces and &, using %XX sequences — used in query strings and path segments.
Is my text sent to a server?
No. Every encode and decode happens entirely in your browser using built-in Web APIs — nothing is uploaded, logged, or stored anywhere.
Does this handle unicode text and emoji?
Yes. Text is encoded as UTF-8 before Base64 or percent-encoding, so accented characters, CJK text, and emoji round-trip correctly.
What happens if I paste invalid Base64 or a malformed percent-encoded string?
Decoding fails clearly with an error message instead of silently producing garbled output, so you know right away the input wasn't valid.
Is the Base64 & URL encoder/decoder really free?
Yes. There's no account to create, no card to enter, and no trial clock ticking in the background. Encoding and decoding are unlimited in both directions, with no cap on how much text you can paste. One small ad slot covers the hosting bill, and that's the whole business model.
Do I need an account to use it?
No — nothing to register for, nothing to download, and no email address asked for at any point. Paste text and it encodes or decodes live, in whichever direction you picked.