Base64 Image Encoder
Convert any local image into a Base64 data URL string for embedding directly into HTML or CSS.
Drag & Drop Image Here
or click to browse local files (Max 5MB)
What is this tool?
The Base64 Image Converter provides bidirectional conversion between image files and Base64 Data URIs. It converts PNG, JPG, WebP, GIF, and SVG images into embeddable data:image/...;base64 strings with ready-to-copy HTML <img> tags and CSS background-image snippets, and decodes raw Base64 strings into previewable, downloadable images.
How to convert images to Base64 and decode Data URIs
- Drop an image file (PNG, JPG, SVG, WebP) into the upload box to generate a Base64 Data URI.
- Copy the raw Base64 string, HTML <img> tag, or CSS url() rule for direct code embedding.
- To decode, switch to the decoder tab and paste any valid Base64 image string or Data URI.
- Inspect the decoded image preview and click Download Image to save it locally.
Key Features
- Bidirectional conversion: Image to Base64 string and Base64 string to downloadable Image
- Generates ready-to-paste code snippets for HTML <img> tags and CSS background-image rules
- Supports PNG, JPEG, SVG, WebP, and GIF image formats
- Live visual image preview and calculated Base64 string length metrics
- Client-side FileReader API processing ensuring maximum security and speed
Frequently Asked Questions
What is a Base64 image Data URI?
A Base64 Data URI is a string representation of binary image data prefixed with 'data:image/[type];base64,'. It allows you to embed images directly inside HTML, CSS, or JSON files without making separate HTTP requests.
When should I use Base64 images instead of image URLs?
Base64 images are ideal for tiny icons, email templates, avatars, or self-contained HTML files where eliminating an additional HTTP network request improves loading performance.
Does converting an image to Base64 increase its file size?
Yes. Base64 encoding increases the binary data size by approximately 33% due to representing 3 bytes of binary data as 4 ASCII characters.
Can I decode a Base64 string without a Data URI header?
Yes. The decoder accepts both complete Data URIs (starting with 'data:image/...') and raw Base64 strings, automatically identifying the image format.
Privacy First
All image encoding and decoding is processed directly in your browser using client-side File APIs. No image files or encoded strings are sent over the network.