Image to Base64 Converter
Convert any image to a Base64 string instantly. Free tool for HTML embedding, CSS backgrounds, data URIs, and API payloads. No signup, 100% private.
Drop your image here
tap to browse or drag and drop
JPG, PNG, WebP, GIF · Max 5MB
When to Use Base64 Images
HTML Embedding
Embed images directly in HTML without external files.
CSS Backgrounds
Use Base64 images in CSS background-image property.
Email Templates
Embed images in HTML emails without external hosting.
JSON/API Data
Send images as Base64 strings in JSON payloads.
Data Storage
Store small images directly in databases.
Data URIs
Create data URIs for use in web browsers.
Three Steps
Upload your image
JPG, PNG, or WebP. Drag and drop or click to browse.
Auto-convert
Instantly encoded to a Base64 string in your browser.
Copy
Click copy and paste into your HTML, CSS, or JavaScript.
What is Base64 Encoding?
Base64 is a binary-to-text encoding scheme that converts binary data (like images) into ASCII text. This allows you to represent binary data as a string of readable characters.
Advantages
- No external hosting needed: The image is embedded directly in the code.
- Reduced HTTP requests: Fewer server requests means faster page loading.
- Universal compatibility: Works everywhere — HTML, CSS, JavaScript.
Disadvantages
- 33% larger file size: Base64 encoding increases file size.
- Not cacheable: Base64 images can't be cached separately.
- Best for small images: Use for icons, thumbnails, not large photos.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a method of converting binary data (like images) into ASCII text. This allows you to embed images directly in HTML, CSS, or JavaScript without needing separate image files.
Why would I need to convert an image to Base64?
Base64 encoding is useful for embedding images in HTML/CSS, sending images via email/JSON, storing images in databases, or creating data URIs for web development.
Does Base64 encoding increase file size?
Yes, Base64 encoding increases file size by approximately 33%. This is because Base64 uses 4 characters to represent every 3 bytes of binary data.
What browsers support Base64 images?
All modern browsers support Base64 encoded images. You can use them in img tags, CSS backgrounds, and even inline SVGs.
What is Base64 Encoding and Why Use It?
Base64 encoding converts binary image data into ASCII text, allowing you to embed images directly in HTML, CSS, or JavaScript without separate image files. This technique is widely used in web development for data URIs, email templates, and API payloads.
How to Convert Image to Base64 Online
- Upload your image — Supports JPG, PNG, and WebP formats.
- Auto-convert — The tool instantly encodes your image to a Base64 string.
- Copy — Click the copy button to paste the string into your code.
- Embed — Use the Base64 string in an
<img>tag, CSSbackground-image, or JavaScript.
When to Use Base64 Images
- HTML email templates — Embed images without external hosting.
- Small icons and thumbnails — Reduce HTTP requests for tiny images.
- JSON/API responses — Send image data as text in API payloads.
- Database storage — Store small images directly as text in databases.
Note: Base64 increases file size by ~33%. Use it for small images (icons, thumbnails), not large photos. For large images, consider our Compress to 100KB tool instead.
Need to compress a photo for a government form? Try our Compress for Govt Form tool. Or check passport photo sizes with our Passport Photo Size tool.