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Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 strings instantly.

URL-safe

Plain Text

Base64 Output

About Base64 Encoder/Decoder

Free Base64 encoder and decoder that converts plain text to Base64 encoding or decodes Base64 strings back to readable text. Supports UTF-8 and ASCII character sets. Commonly used by developers for encoding API tokens, embedding data in URLs, handling email attachments, and working with data URIs. Paste your input, click encode or decode, and copy the result.

Frequently Asked Questions

What is Base64 encoding used for?▾

Base64 encoding converts binary data into ASCII text, making it safe to transmit through text-based systems like email, URLs, and JSON APIs. Common uses include encoding images for data URIs, handling authentication tokens, and embedding binary data in XML or HTML.

Is Base64 encoding the same as encryption?▾

No. Base64 is an encoding scheme, not encryption. It converts data to a different format but does not protect or secure it. Anyone can decode Base64 strings - it should not be used for sensitive data protection.

Why does Base64 make text longer?▾

Base64 encoding increases data size by approximately 33%. It converts every 3 bytes of input into 4 ASCII characters. This overhead is the trade-off for making binary data safe to transmit through text-only channels like email and URLs.

What characters are used in Base64?▾

Standard Base64 uses 64 characters: A-Z, a-z, 0-9, plus (+) and slash (/), with equals (=) for padding. URL-safe Base64 replaces + and / with - and _ to avoid conflicts with URL special characters.

Is this Base64 tool free and private?▾

Yes, completely free with no signup required. All encoding and decoding happens in your browser - your data is never sent to any server, making it safe to use with API tokens, credentials, and other sensitive strings.

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