Base64 Encoder / Decoder

Encode text into Base64 or decode Base64 back into readable UTF-8 text.

How Base64 works

Base64 converts bytes into a text-safe alphabet. It usually turns 3 bytes into 4 Base64 characters. Padding with = is used when the final byte group is incomplete.

Type: Encoding Secret key: None Alphabet: A-Z a-z 0-9 + / Padding: = Security: Not encryption

Options

Use URL-safe alphabet

Omit padding on encode

Ignore whitespace when decoding

Wrap encoded output

Encoding uses UTF-8, so ordinary text, symbols, and emoji can be converted safely before being turned into Base64.

Output stats

Mode: Encode Input chars: 0 Input bytes: 0 Output chars: 0 Output bytes: 0 Base64 chars: 0 Padding: 0 Lines: 0

Base64 is useful for transport, APIs, and safe text representation, but it does not hide meaning. If someone can see the Base64 string, they can usually decode it immediately.

Input text

Output Base64

Using This Tool: Guide & Notes Show guide

Base64 encodes bytes as printable text. It is common in web APIs, email, data URIs, certificates, and developer tools.

How to use it

Choose Encode to turn text into Base64, or Decode to turn Base64 back into UTF-8 text.
Paste input into the input box and check the output.
Use Load example to confirm the expected padding and alphabet style.
Copy either side when the result is ready.

Options and settings

URL-safe alphabet replaces + and / with characters safer for URLs and filenames.
Omit padding removes trailing = characters when a system expects unpadded Base64.
Ignore whitespace when decoding accepts wrapped or spaced Base64 input.
Wrap encoded output breaks long Base64 strings into fixed-width lines.

Notes

Base64 is encoding, not encryption. Anyone can decode it.
Decoded bytes must be valid UTF-8 if you want readable text output.

Base64: The Encoding That Smuggles Binary Through Text

How a simple 6-bit alphabet became one of the quiet workhorses of email, the web, APIs, certificates, tokens, and modern software plumbing.

Read the article

Signal acquired

A note from the team

We build these tools because we love cryptography, encoding, and making difficult ideas easier to explore. If they've helped you, even a small coffee means the world to the project. Thank you!

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