Nothing uploaded
Base64 encoder and decoder
Encode text as Base64 or decode Base64 back to text, with emoji and accents handled correctly and a URL-safe option. Nothing you paste leaves your browser.
For web addresses, file names and JWTs.
Base64
Type or paste text to encode.
What you type stays on this device. Nothing is uploaded.
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How to encode or decode Base64
- Choose Encode or Decode.
- Type or paste your text or Base64 into the box. The result appears as you type.
- Copy the result, or press Swap to send it back the other way.
Questions
Is what I paste sent anywhere?
No. Encoding and decoding happen in your browser on this device. Nothing is uploaded or stored, so it’s safe to decode real tokens, keys and customer data.
What is URL-safe Base64?
It uses - and _ instead of + and /, and usually leaves out the = padding, so the result can go in a web address or file name unchanged. JWTs use it. When decoding, both kinds are accepted.
Why does it say the result isn’t text?
Base64 can hold any data: images, PDFs, compressed or encrypted data. If the decoded bytes aren’t UTF-8 text, they’re shown as hexadecimal, and you can download them as a file.
Does it work with emoji and accents?
Yes. Text is turned into UTF-8 bytes before encoding, the standard on the web, so emoji, accents and every alphabet come back exactly as they were.