Image to Base64 Encoder
Encode images into Base64 strings for direct CSS/HTML embedding. 100% client-side.
Drag & drop an image here
Get the Base64 data URI instantly.
What is Base64 Image Encoding?
Base64 image encoding converts binary image data into an ASCII text string. This allows you to embed images directly in HTML, CSS, or JavaScript without separate image files. Base64-encoded images are useful for small icons, email templates, single-page applications, and reducing HTTP requests. Our free online Base64 encoder converts any image (PNG, JPEG, WebP, GIF, SVG) to a Base64 data URI string that you can embed directly in your code.
How to Convert Images to Base64
- 1Upload your image
Select or drag and drop the image you want to encode (PNG, JPEG, WebP, GIF, SVG).
- 2Get the Base64 string
The Base64-encoded data URI is generated instantly.
- 3Choose the format
Copy as a full data URI (data:image/png;base64,...), raw Base64 string, or CSS background-image snippet.
- 4Embed in your code
Paste the Base64 string into your HTML img src, CSS background-image, or JavaScript code.
Frequently Asked Questions
When should I use Base64 encoding?
Base64 is ideal for small images (icons, logos under 10KB) where reducing HTTP requests improves performance. For large images, Base64 encoding increases file size by ~33%, so regular image files are more efficient.
Does Base64 increase file size?
Yes. Base64 encoding increases data size by approximately 33%. A 10KB image becomes ~13.3KB in Base64. This trade-off is worthwhile for small images where eliminating an HTTP request is beneficial.
Can I use Base64 images in emails?
Yes. Base64-embedded images are commonly used in HTML emails because they don't require external image hosting. However, some email clients have size limits for embedded images.
Why Use DevDeck?
DevDeck converts images to Base64 entirely in your browser. Your images — including logos, screenshots, and private assets — are never uploaded to any server.