Utilities
Image to Base64
Convert images to base64-encoded strings for embedding directly in HTML, CSS, emails, and JSON payloads. Generates ready-to-use data URIs with the correct MIME type. Useful for eliminating external image requests in web pages and emails.
Features
- Generates complete data URI with MIME type
- Supports JPEG, PNG, WebP, GIF, and SVG encoding
- Copy-to-clipboard for the encoded string
- Shows encoded size vs original size
- Batch convert multiple images
What you can do
- Embed small icons as data URIs in CSS to reduce HTTP requests
- Inline images in HTML email templates for guaranteed display
- Convert images to base64 for inclusion in JSON API responses
- Generate data URIs for use in SVG documents and inline styles
Self-hosted. Your images never leave your network.
SnapOtter runs entirely on your own infrastructure. Images processed with Image to Base64 are never uploaded to third-party servers. Deploy a single Docker container and process images with full privacy, no watermarks, and no usage limits. Open source under AGPL-3.0.
Frequently asked questions
- When should I use base64 instead of a regular image file?
- Base64 is best for very small images (icons, UI elements under 2-3KB) where eliminating an HTTP request saves more time than the 33% size increase from encoding. For larger images, use regular files.
- Does base64 increase file size?
- Yes. Base64 encoding increases the data size by approximately 33% because it converts binary data to text (3 bytes become 4 characters). This is why it is only recommended for small images.
- Can I use a base64 image in CSS?
- Yes. Use the generated data URI as a background-image value: background-image: url('data:image/png;base64,...'). This embeds the image directly in your stylesheet.
Ready to try Image to Base64?
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