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Free Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 to plain text instantly.

About this tool

Base64 is a binary-to-text encoding scheme that converts binary data into an ASCII string format. It is widely used in web development, email systems, and data transfer to safely transmit data that might otherwise be corrupted or misinterpreted by text-based systems. This free Base64 Encoder & Decoder tool runs entirely in your browser. Your data never leaves your device - nothing is sent to any server. This makes it safe to use even with sensitive content. Common use cases include encoding API keys for HTTP Basic Authentication headers, embedding images directly in HTML or CSS as data URIs, encoding JSON payloads in JWT tokens, and transmitting binary file contents over text-based protocols like email or JSON APIs.

How to use

Step 1: Select Encode to convert plain text to Base64, or Decode to convert Base64 back to plain text.
Step 2: Paste or type your input text in the left box.
Step 3: Click Convert to instantly process your text.
Step 4: Click Copy to copy the result to your clipboard.
Step 5: Use the Swap button to flip the input and output and switch modes automatically.

Frequently Asked Questions

Base64 is an encoding scheme that represents binary data using 64 printable ASCII characters (A-Z, a-z, 0-9, +, /). It is commonly used to safely transmit binary data over text-based protocols.

No. Base64 is an encoding scheme, not encryption. It does not provide any security or confidentiality - anyone can decode a Base64 string. Never use Base64 as a security measure.

Base64 encodes data in groups of 3 bytes into 4 characters. If the input is not a multiple of 3 bytes, padding characters (=) are added to make the length a multiple of 4.

Standard Base64 uses + and / characters which are special in URLs. URL-safe Base64 replaces + with - and / with _ to make the encoded string safe to use in URLs without additional encoding.

This tool works with text input. To encode binary files like images to Base64, you would need a tool that accepts file upload and reads the binary content directly.

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