🔐 Image to Base64 Encoder Offline
Convert images to Base64 strings for embedding in HTML/CSS. 100% offline - your images never leave your browser.
How to Use
Upload an image and the tool generates both a Data URI and raw Base64 string. I use the Data URI when I need to embed images directly in HTML or CSS, and the raw Base64 when storing in JSON or databases.
- Upload an image file (PNG, JPEG, GIF, WebP, SVG).
- Preview the image to confirm it looks right.
- Copy the Data URI or raw Base64 string.
- Paste the result into your project.
Use Cases
Image → Base64 is handy for:
- Email templates with embedded logos or icons.
- Inline UI assets for small icons in single-page apps.
- API payloads where you need to send image content.
- Offline-first apps that bundle assets directly.
Tips & Best Practices
- Keep files small: Base64 adds ~33% overhead, so use this for icons or small assets.
- Optimize first: Compress images before encoding to avoid bloated HTML.
- Prefer SVG: SVGs encode efficiently and scale perfectly.
- Use Data URI only when needed: External assets cache better for large images.
Comparison with online tools
Online converters require uploading image files. TurboUtil keeps images local, which is safer for private or proprietary assets.
Online converters
- Upload image files to servers
- Potential data retention
- Require internet access
- Often limit file size
TurboUtil
- Runs entirely client-side
- No uploads or tracking
- Works offline after load
- Instant conversion
FAQ
Should I use Data URI or raw Base64?
Use Data URI for HTML/CSS embedding. Use raw Base64 for APIs or databases.
Why is my output so large?
Base64 adds roughly 33% size overhead. Compress the image first.
Is my image uploaded?
No. Everything runs locally in the browser.
Can I encode SVG?
Yes. SVGs are supported and work well with Base64.