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Free developer utilities that run entirely in your browser. Fast, private, and always free.

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  • JSON Formatter
  • Base64 Encoder
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  3. Base64 Encoder/Decoder

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 to text

Related Tools

  • URL Encoder - encode URL components safely
  • Hash Generator - create cryptographic hashes
  • Image to Base64 - encode images for AI vision models
  • JWT Decoder - decode Base64-encoded tokens

How to Use Base64 Encoder/Decoder

  1. Enter your text or Base64 string

    Paste the text you want to encode, or a Base64 string you want to decode.

  2. Select encode or decode mode

    Choose whether to encode plain text to Base64 or decode Base64 back to text.

  3. Copy the result

    Click the Copy button to copy the encoded or decoded output to your clipboard.

Frequently Asked Questions

Is the Base64 Encoder/Decoder free to use?
Yes, this Base64 tool is completely free with no usage limits. Encode or decode as many strings as you need without any registration or payment required.
Is my data secure when using this Base64 tool?
Yes, your data is completely secure. All Base64 encoding and decoding operations happen locally in your browser. No data is ever transmitted to our servers or any third party. Your sensitive information stays on your device at all times.
What is Base64 encoding used for?
Base64 encoding is commonly used to safely transmit binary data over text-based protocols like email (MIME) or embed images directly in HTML/CSS (data URIs). It converts binary data into ASCII characters, making it safe to include in JSON, XML, URLs, and other text formats that might not handle raw binary data well.
Can I encode files to Base64 with this tool?
This tool is designed for text-to-Base64 conversion. For encoding images and other files to Base64, we offer a dedicated Image to Base64 tool that handles binary files and generates data URIs suitable for embedding in web pages or sending to AI vision APIs.
Why does Base64 encoding increase the size of my data?
Base64 encoding increases data size by approximately 33% because it represents 6 bits of binary data with 8-bit ASCII characters. For every 3 bytes of input, Base64 produces 4 characters of output. This overhead is the trade-off for being able to safely transmit binary data as text.