Base64 Encode

Encode text or files into Base64 for safe transport in JSON, email, or data URIs.

About Base64 Encode

Base64 encoding rewrites binary or text data using only 64 safe ASCII characters, so it can travel through systems that were built for plain text. The Base64 Encoder takes a file or a block of text and returns its Base64 representation, ready to drop into a JSON field, an email header, an XML document, or a data URI.

Paste your text or upload a file and copy the encoded result. Encoding is deterministic: the same input always produces the same output, and the size grows by about a third because every three bytes become four characters.

Developers use it to embed small images directly in CSS or HTML, to send binary payloads through text-only APIs, and to store certificates in configuration files. Because Base64 is an encoding and not encryption, treat the output as readable - anyone can decode it, so never rely on it to hide secrets.

Frequently asked questions

Is Base64 the same as encryption?

No. Base64 only re-represents data using safe characters; anyone can reverse it. Use AES Encrypt if you need confidentiality.

Why is my encoded text larger than the original?

Base64 expands data by about 33 percent, because every three bytes are written as four characters.

What is URL-safe Base64?

A variant that replaces + and / with - and _ so the result is safe inside URLs and filenames.

Can I encode any file type?

Yes. Images, PDFs, archives and other binaries all encode the same way, and the result is plain text.

Does encoding change my original file?

No. The tool produces a new encoded string and leaves your input untouched.