Is my data uploaded to a server?

No. Base64 encoding and decoding are pure JavaScript operations that run entirely in your browser.

What is Base64 used for?

Base64 is used to safely transmit binary data as text — in emails, data URLs, API payloads, and configuration files.

Is there a size limit?

There is no hard limit, but very large files (over 10 MB) may slow down your browser tab. The output Base64 string will be roughly 33% larger than the input.

Does Base64 encrypt my data?

No. Base64 is an encoding scheme, not encryption. Anyone with the Base64 string can decode it instantly. Do not use it to protect sensitive data.

Кодирование / Декодирование Base64

Paste text or load a file to encode it as Base64, or paste a Base64 string to decode it. All processing happens locally in your browser.

encodedecodeno-upload

Ввод

Ваши данные никогда не покидают браузер. Всё кодирование происходит локально.

Кодирование / Декодирование Base64

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