Purpose: Encode text to Base64 or decode Base64 back to text - Unicode safe, ideal for data URIs and tokens.
Base64 Encoder
The Base64 Encoder converts text to Base64 and decodes it back, with full Unicode support - the encoding used for data URIs, email attachments, and API tokens.
What Base64 is for
Base64 represents binary or text data using only 64 safe ASCII characters, so it can travel through systems that expect plain text - embedding an image in CSS as a data URI, encoding email attachments (MIME), or packing binary into JSON. It typically makes data about 33% larger, which is the cost of that safety.
Encode and decode both ways
Type text to encode it, or paste Base64 to decode it back. Full Unicode support means emojis and non-Latin scripts round-trip correctly. Remember: Base64 is encoding, not encryption - it provides no security, only safe transport. Everything runs locally in your browser.
Frequently Asked Questions
Is Base64 a form of encryption?
No. Base64 is reversible encoding with no secret key, so it provides no security - anyone can decode it. Use it for safe transport, not protection.
Why does Base64 make data bigger?
It encodes every 3 bytes as 4 characters, so the output is about 33% larger than the original.
Does it support emojis and non-English text?
Yes. It handles full Unicode, so emojis and non-Latin scripts encode and decode correctly.
What is Base64 commonly used for?
Data URIs in CSS/HTML, email attachments, and embedding binary data inside text formats like JSON or XML.
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