Developer

Base64 Encoder / Decoder

Convert plain text to Base64, or decode a Base64 string back to readable text.

Input

Output

How to use the base64 encoder / decoder

Paste text (to encode) or a Base64 string (to decode) into the input box.
Click the matching button.
Copy the result from the output box.

Features

Full Unicode support, including emoji and accented characters
Clear error message for invalid Base64 input
One-click copy

When Base64 is useful

Base64 converts text or binary data into a text-safe representation that can travel through systems designed for plain text. It is commonly seen in data URLs, API payloads, configuration files and email content.

Base64 is encoding, not encryption. Anyone who has the encoded value can decode it, so do not use it to protect passwords, secrets or private information. For security, use proper encryption or a secret-management system instead.

For developer testing, decode unfamiliar Base64 only when you trust the source. Decoding can reveal text or binary content, but the fact that a value is Base64 says nothing about whether the underlying data is safe to open or execute.

A quick sanity check after decoding is to look at the output type: readable text should appear as normal characters, while arbitrary binary data may contain symbols or control bytes that are not meaningful in a text box.

Frequently asked questions

Base64 turns arbitrary bytes into plain ASCII text, which is useful for embedding small files or binary data inside text formats like JSON, URLs or email.

Yes, the tool encodes and decodes UTF-8 text correctly, including accented letters and emoji.

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Base64 is encoding, not encryption

Base64 changes binary or text data into an ASCII-safe representation. Anyone can decode it, so it should never be used to hide passwords, API secrets or private information. Its value is compatibility, not confidentiality.

Use Base64 for transport or embedding where text-only data is required.
Do not treat an encoded value as securely protected.
For large files, Base64 adds overhead; direct file transfer is usually more efficient.