Image to Base64 Converter
Convert PNG, JPG, GIF, SVG images to Base64 strings instantly. Perfect for embedding images in CSS, HTML, or JSON files.
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Instant Conversion
Convert in milliseconds
100% Private
No server uploads
All Formats
PNG, JPG, GIF, SVG, WebP
Why Choose Filator's Image to Base64 Converter?
Multiple Output Formats
Get Base64 as Data URI, CSS background-image, HTML img tag, or raw string. Ready to paste into your code instantly.
100% Client-Side
Your images never leave your browser. All processing happens locally using JavaScript—no server uploads, complete privacy.
All Image Formats
Support for PNG, JPG, GIF, SVG, WebP, BMP, ICO, and TIFF. Automatic MIME type detection for correct Data URI output.
How to Convert Images to Base64 Online for Free
Filator's free Image to Base64 converter lets you encode any image into a Base64 string instantly in your browser—no file uploads to servers, no signup required. Unlike competitors like Base64-image.de (1MB limit, 20 files max), CodeBeautify (4MB limit), and Base64.guru (server processing for URLs), Filator processes everything locally on your device with no file size restrictions for complete privacy.
Why Convert Images to Base64?
Reduce HTTP Requests
Embed small images directly in HTML or CSS to eliminate separate HTTP requests. Significantly improves page load times for sites with many small icons or logos.
Email Templates
Base64 images display immediately in emails without requiring external hosting. Email clients often block external images by default—embedded images always show.
Self-Contained Files
Create HTML files that work offline with all images embedded. Perfect for documentation, reports, or single-file web applications.
API and JSON Data
Include images in JSON responses or API payloads without separate file hosting. Essential for data transfer between systems.
How to Convert Image to Base64 Step-by-Step
- 1.Drag and drop your image into the upload area, or click to select a file from your device
- 2.The image is instantly converted to Base64—preview appears immediately
- 3.Choose your output format: Data URI, CSS background, HTML img tag, or raw Base64
- 4.Click "Copy" to copy the Base64 string to your clipboard instantly
- 5.Paste directly into your HTML, CSS, JavaScript, or JSON code
Supported Image Formats
| Format | MIME Type | Best For |
|---|---|---|
| PNG | image/png | Logos, icons, transparency |
| JPG/JPEG | image/jpeg | Photos, complex images |
| GIF | image/gif | Animations, simple graphics |
| SVG | image/svg+xml | Scalable vector graphics |
| WebP | image/webp | Modern web format |
| BMP | image/bmp | Uncompressed bitmaps |
| ICO | image/x-icon | Favicons |
How to Use Base64 Images in Code
In HTML (img tag)
<img src="data:image/png;base64,iVBORw0KGgo..." alt="Logo" />In CSS (background-image)
.logo {
background-image: url('data:image/png;base64,iVBORw0KGgo...');
width: 100px;
height: 50px;
}In JavaScript
const imageData = 'data:image/png;base64,iVBORw0KGgo...';
document.getElementById('logo').src = imageData;Advanced Features
- • Multiple Output Formats: Get Base64 as raw string, Data URI, CSS background-image, HTML img tag, or JSON format
- • Batch Conversion: Convert multiple images at once with individual copy buttons for each
- • Auto MIME Detection: Automatically detects image format and includes correct MIME type in Data URI
- • Image Preview: See your image alongside the generated Base64 string
- • Copy to Clipboard: One-click copy for instant use in your code
- • No File Limits: No restrictions on file size or number of conversions
- • Offline Support: Install as PWA to convert images without internet after initial load
- • Cross-Platform: Works on Windows, Mac, Linux, iOS, and Android with any modern browser
Best Practices for Base64 Images
Use for Small Images
Base64 encoding increases file size by about 33%. Best suited for small images under 10KB like icons, logos, and UI elements.
Consider Caching
Base64 images embedded in HTML/CSS cannot be cached separately. For frequently used large images, external files may be more efficient.
Optimize First
Compress and optimize images before converting to Base64. Smaller source images create shorter, more efficient Base64 strings.
Use Data URI Format
Always include the Data URI prefix (data:image/type;base64,) for browser compatibility. Filator generates this automatically.
Frequently Asked Questions
What is Base64 encoding and why convert images to Base64?
Base64 encoding converts binary image data into ASCII text strings. This allows you to embed images directly in HTML, CSS, or JavaScript code without separate image files. Benefits include reducing HTTP requests, embedding images in emails, and creating self-contained HTML files.
How do I convert an image to Base64 online?
Simply drag and drop your image into Filator's converter or click to select a file. The tool instantly generates the Base64 string with options to copy as Data URI, CSS background-image, HTML img tag, or raw Base64. Everything happens in your browser with no server upload.
Is it safe to convert images to Base64 online?
Yes, Filator processes images 100% client-side in your browser using JavaScript. Your images never leave your device or get uploaded to any server. This makes it completely safe for converting sensitive or private images.
What image formats can I convert to Base64?
Filator supports all common image formats including PNG, JPG/JPEG, GIF, SVG, WebP, BMP, ICO, and TIFF. Each format is automatically detected and the correct MIME type is included in the Data URI output.
What is the maximum image size I can convert?
There is no hard file size limit since processing happens in your browser. However, for best performance when embedding in HTML or CSS, we recommend keeping images under 10KB. Large Base64 strings increase file size and cannot be cached separately.
How do I use Base64 images in CSS?
Use the Data URI format in CSS background-image property. Filator generates ready-to-use CSS code that you can copy directly into your stylesheet. The format is: background-image: url(data:image/png;base64,...);
Can I convert multiple images to Base64 at once?
Yes, Filator supports batch conversion. Upload multiple images simultaneously and convert them all to Base64 in one go. Each image gets its own Base64 output that you can copy individually.
Does the Image to Base64 converter work offline?
Yes, after the initial page load, Filator works completely offline. Install it as a PWA (Progressive Web App) to convert images to Base64 without an internet connection. Perfect for developers working in restricted environments.
Ready to Convert Your Images to Base64?
Start converting images instantly with no signup, no file size limits, and complete privacy. Get multiple output formats ready for HTML, CSS, JavaScript, or JSON. Fast, secure, and completely free—with none of the limitations you find on other converters.