Why do other tools garble my accented characters?

They use the legacy btoa and atob functions, which only handle Latin-1. This tool converts to UTF-8 bytes first, so any language round-trips correctly.

Is Base64 encryption?

No. Base64 is an encoding, not encryption — anyone can decode it instantly. Never use it to protect passwords or secrets.

Base64 Encoder / Decoder

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INPUT

Direction

OUTPUT

Encode and decode Base64 with full UTF-8 support, so accents, Chinese and emoji survive the round trip. Free and client-side.

How to use Base64 Encoder / Decoder

Paste or type your contentThe result appears as you type — there is no submit button.
Set “Direction”
Read and copy the resultThe output updates live and the copy button takes it in one click.

Worked example

Hello world: SGVsbG8gd29ybGQ=

Nothing you enter leaves your device

All of the work happens inside your browser. Whatever you type is never packaged up and sent to a server, and no request this page makes carries it.

That makes it safe for contract amounts, personal details and internal documents you would rather not hand to a third party — close the tab and it is gone.

What this tool does not do

Base64 Encoder / Decoder only does what a browser can do on its own — it talks to no backend service. So it keeps no history for you and syncs nothing across devices; if you need a record, copy or download the result.

It is also not a substitute for professional judgement. For legal, medical or tax decisions, treat the output as a starting point rather than a final answer.

Frequently Asked Questions

Why do other tools garble my accented characters?: They use the legacy btoa and atob functions, which only handle Latin-1. This tool converts to UTF-8 bytes first, so any language round-trips correctly.
Is Base64 encryption?: No. Base64 is an encoding, not encryption — anyone can decode it instantly. Never use it to protect passwords or secrets.