Base64 Converter
Encode and decode Base64 text and files. Convert images to Base64 and back.
About Base64 Converter
Convert text and files to Base64 encoding and decode Base64 back to original content. Perfect for embedding images in HTML/CSS, encoding API payloads, and handling data URIs. Supports both text and file (image) conversion with instant results.
Tips for Best Results
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Base64 encoding increases file size by approximately 33% — only use it for small files.
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Data URIs work best for icons and small images under 5KB.
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When decoding, make sure the Base64 string is complete — truncated strings will fail.
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Use the image-to-Base64 feature for quickly generating CSS background-image data URIs.
How to Use Base64 Converter
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Choose the mode: Encode or Decode.
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For Encode: paste text or upload an image file. For Decode: paste Base64 string.
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The conversion happens instantly in your browser.
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Review the output size and format information displayed.
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Copy the result or download it as a file.
Common Use Cases
Web Development
Embed small images directly in HTML and CSS as data URIs to reduce HTTP requests.
API Development
Encode binary data for JSON payloads that only support text content.
Email Development
Embed images in HTML emails that display without external image hosting.
Data Transfer
Safely transfer binary data through text-only channels like copy-paste and chat.
Why Use Our Base64 Converter؟
Encode and decode Base64 text
Convert images to Base64
Copy to clipboard instantly
Show output size
100% client-side
Free and unlimited