Free Image to Base64 Converter - Images to Base64 Online | ToolZen
Convert images to Base64 strings or decode Base64 back to images. Supports PNG, JPG, GIF, WebP, SVG.
Click to upload or drag and drop
Supports: PNG, JPG, GIF, WebP, SVG, BMP, ICO
Frequently Asked Questions
1. What is Image to Base64 conversion?
Image to Base64 conversion encodes binary image data into a Base64 ASCII string format. This allows images to be embedded directly in HTML, CSS, or JSON without separate file requests. The format is: data:image/png;base64,<encoded_data>.
2. Which image formats are supported?
Our tool supports all common image formats including PNG, JPG/JPEG, GIF, WebP, SVG, BMP, and ICO. The output will include the correct MIME type in the Data URI.
3. Is there a file size limit?
Since all processing is done in your browser, the limit depends on your device memory. For very large images (over 5MB), the Base64 string will be quite long (about 1.37x the original size). We recommend keeping images under 2MB for best performance.
4. Is my data uploaded to your servers?
No. All conversion happens locally in your browser. Your images and data never leave your device, making this tool 100% private and secure.
5. How do I use the Base64 string in HTML?
You can use the full Data URI directly in HTML: <img src="data:image/png;base64,..."> or in CSS: background-image: url(data:image/png;base64,...). Note that embedding large images as Base64 can increase page load time.
Key Features
- Image to Base64 — Convert images to Base64 strings
- Base64 to Image — Decode Base64 back to viewable images
- Drag and Drop — Easy drag-and-drop file upload
- Preview — See image preview before conversion
- Copy Output — Copy Base64 string with one click
How to Use
Step 1: Upload image
Drag and drop or select an image file.
Step 2: View Base64
The Base64 string is generated automatically.
Step 3: Copy
Copy the Base64 or paste to decode back.
Use Cases
Inline Images
Embed images as data URIs in HTML or CSS.
API Data
Send images as Base64 strings in API requests.
DB Storage
Store images as Base64 text in databases.
Why Choose ToolZen?
| Feature | ToolZen | Others |
|---|---|---|
| Privacy | Client-Side | Server Upload |
| Cost | Free | Freemium |
| Formats | PNG+JPG+GIF+WebP+SVG | Limited |
| Drag-Drop | Yes | No |