Convert Image to Base64 — Free, Instant
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Supports: JPG, PNG, WebP, GIF, SVG
Encode Images as Base64
Vizua's Base64 encoder converts any image into a data URI string that you can embed directly in HTML or CSS. No need for separate image files — the image data is included inline.
Output Formats
- Data URI — the raw Base64 string with MIME type prefix
- HTML img tag — ready-to-use img element with the data URI as src
- CSS background — background-image property with the data URI
Best Practices
Base64 encoding increases size by ~33%, so it's best for small images (icons, logos). For images over 10KB, use regular file references with proper caching instead.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a way to represent binary data (like images) as ASCII text. This lets you embed images directly in HTML, CSS, or JSON without separate image files.
When should I use Base64 images?
Base64 is best for small images (under 10KB) like icons, logos, and tiny thumbnails. For larger images, separate files with proper caching are more efficient.
Does Base64 increase file size?
Yes — Base64 encoding increases data size by about 33%. A 10KB image becomes about 13.3KB in Base64. This is acceptable for small images but inefficient for large ones.