Base64 Encoder
Encode and decode text to/from Base64 instantly. It runs entirely in your browser — no signup, no installation, and nothing you paste or drop leaves your device.
Base64 is an encoding, not encryption: anybody can turn the result back into the original text. Everything runs in your browser, nothing is uploaded.
What Base64 Encoding Does
Base64 turns text or bytes into 64 printable characters, so data survives systems that only accept plain ASCII: e-mail bodies, JSON fields, data URLs or the payload of a JWT. Paste your text above and the result appears immediately, in your browser, with nothing uploaded and no account needed. The encoder works on UTF-8 bytes, so German umlauts, accented letters and emoji are converted correctly instead of breaking the output. Two switches cover the common layouts: the URL-safe alphabet of RFC 4648 section 5 (- and _ instead of + and /) and line breaks every 76 characters, the layout MIME and PEM files expect. Under the fields you see how the size changes: Base64 needs four characters for every three bytes, so ASCII text grows by about a third. What it does not do: this is not encryption and it hides nothing, because anybody can decode the result.
Was Base64-Kodierung tut
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What is Base64 Encoder / Decoder?
Base64 Encoder / Decoder is a free online developer tool built for developers debugging payloads, configs and code. Encode and decode text to/from Base64 instantly In practice you paste your text or Base64 string, choose encode or decode, and then copy the converted value.
Your code, tokens and payloads never leave the browser, which matters when you are debugging something under NDA or handling production data.
How to use Base64 Encoder / Decoder
- Paste your text or Base64 string.
- Choose encode or decode.
- Copy the converted value.
Base64 Encoder / Decoder FAQ
Is Base64 Encoder / Decoder free to use?
Yes. Base64 Encoder / Decoder is completely free and needs no account, no trial and no payment details. Every feature on the page is available without limits.
Is my data uploaded anywhere?
No. Base64 Encoder / Decoder runs entirely in your browser, so the text, file or number you enter never leaves your device.
Does Base64 Encoder / Decoder work on a phone or tablet?
Yes. It works in any modern browser on desktop, tablet and phone. There is no app to install and no account to create.
How do I use Base64 Encoder / Decoder?
Paste your text or Base64 string. Choose encode or decode. Copy the converted value.