Base64 Encoder & Decoder
Base64 Encoder & Decoder
Encode text or binary data into Base64 format or decode Base64 strings with full UTF-8 Unicode support.
Base64 Encoded Result
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About Base64 Encoder & Decoder
Base64 encoding is an essential tool for software engineers, data scientists, and web developers. It allows binary assets, authorization headers, cryptographic tokens, and embedded images to be represented in clean ASCII strings. ConvertSheet provides a 100% client-side encoder and decoder that runs entirely in your browser memory, guaranteeing that sensitive keys, credentials, and payloads are never sent to external servers.
How to Convert Base64 Encoder & Decoder to Result Online in 3 Simple Steps
Convert your data effortlessly with zero installations and complete local privacy.
- 1Step 1:
Select Mode
Choose whether you want to encode plain text into Base64 or decode an existing Base64 string.
- 2Step 2:
Input Content
Type, paste, or upload your UTF-8 text or raw data into the input workspace.
- 3Step 3:
Copy or Download
Instantly copy the converted output to your clipboard with one click.
Frequently Asked Questions: Base64 Encoder & Decoder
Answers to common questions regarding inputs, calculations, and mathematical methodology.
Does this Base64 tool support UTF-8 and special characters?
Yes. Our engine uses TextEncoder and TextDecoder APIs to safely handle Unicode characters, emojis, and non-ASCII text without encoding errors.
Are my encoded keys or tokens transmitted to your servers?
No. The entire transformation executes locally in your browser memory using client-side JavaScript. Zero bytes are uploaded.
What is Base64 padding (=)?
Base64 requires inputs to be multiples of 3 bytes. If the input has 1 or 2 leftover bytes, '=' padding characters are appended to satisfy the 24-bit block alignment.
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