Does this tool support non-English text and emoji?

Yes — it uses the browser's TextEncoder/TextDecoder APIs to convert text to UTF-8 bytes before Base64-encoding, so Arabic, Urdu, Hindi, Chinese, emoji, and any other Unicode text encode and decode correctly, unlike the raw btoa()/atob() functions which only support Latin-1 text.

Is Base64 encoding the same as encryption?

No. Base64 is a reversible encoding scheme, not encryption — anyone can decode a Base64 string back to its original content with this same tool or any standard library. It provides no confidentiality or security on its own.

Why did decoding fail with an error?

A 'this doesn't look like valid Base64' error usually means the input has extra whitespace, is missing characters, or simply isn't a Base64 string in the first place — Base64 only uses the characters A-Z, a-z, 0-9, +, /, and = for padding.

Base64 Encoder & Decoder

Encode any text to Base64 or decode it back — with full support for non-English scripts and emoji, entirely in your browser.

How to use the Base64 encoder/decoder

Pick the "Encode" or "Decode" tab, depending on which direction you need.
Paste plain text (to encode) or a Base64 string (to decode) into the box.
Click the Encode/Decode button, then copy the result with one click.

How Base64 encoding works

Base64 takes every 3 bytes of input data and represents them as 4 printable ASCII characters, using an alphabet of 64 characters (A–Z, a–z, 0–9, +, /) plus = for padding when the input length isn't a multiple of 3 bytes. The result is roughly 33% larger than the original data, but is safe to transmit anywhere that only supports plain ASCII text.

Input	Base64 output
Hello	SGVsbG8=
OmniFin	T21uaUZpbg==

Quick answer

Base64 encoding converts text or binary data into a plain ASCII string using a 64-character alphabet, making it safe to embed anywhere only plain text is supported — such as JSON, URLs, or email. It's fully reversible and provides no encryption or security on its own; this tool encodes and decodes it instantly in your browser with full Unicode support.

Base64 Encoder/Decoder — FAQs

Base64 converts binary or text data into a plain ASCII string made up of letters, numbers, and a few symbols, so it can be safely embedded in places that only support plain text — such as JSON payloads, email attachments, URLs, or data embedded directly in HTML/CSS.

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