Base64 Encode and Decode

Encode text or images to Base64 and decode Base64 strings back to their original format.

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1. Select the Encode or Decode mode using the toggle at the top of the tool. 2. For text encoding, paste your plain text into the input area to generate the Base64 string instantly. 3. For image encoding, drag and drop an image file or click to upload it and receive a data URI output. 4. To decode, paste a Base64 string into the input and view the decoded plain text or image preview. 5. Toggle between standard and URL-safe Base64 variants depending on your use case. 6. Click the copy button to copy the result to your clipboard.

About This Tool

The Base64 Encode and Decode tool handles both text and file encoding with ease. Paste any text to encode it to Base64, or paste a Base64 string to decode it back to readable text. For images, drag and drop or upload a file to get a Base64 data URI ready for embedding in HTML, CSS, or JSON.

Base64 encoding is essential when you need to embed binary data in text-based formats, transmit data through channels that only support ASCII, or include small images directly in your code without separate file requests. This tool supports standard Base64 as well as URL-safe Base64 variants.

All encoding and decoding happens in your browser using native JavaScript APIs. No data is transmitted to any server, making it safe for sensitive content, API keys, or proprietary assets.

Frequently Asked Questions

Base64 encoding converts binary data into ASCII text, making it safe to transmit through text-based protocols like email (MIME), embed in JSON or XML, or include images directly in HTML/CSS as data URIs.
Yes. Upload or drag and drop any image file (PNG, JPG, GIF, SVG, WebP) and the tool generates a complete data URI string you can use directly in img src attributes, CSS background-image properties, or anywhere else.
No. Base64 is an encoding scheme, not encryption. Anyone can decode a Base64 string back to its original form. It is meant for data transport compatibility, not for protecting sensitive information.
Base64 encoding increases data size by approximately 33% because it represents every 3 bytes of binary data as 4 ASCII characters. This is the trade-off for compatibility with text-only channels.
Standard Base64 uses + and / characters, which have special meaning in URLs. URL-safe Base64 replaces these with - and _ respectively, making it safe for use in URLs and filenames without additional encoding.

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