Image to Base64 Converter

Convert images to Base64 Data URLs for embedding in HTML, CSS, and JavaScript. Instant conversion, no upload. For developers.

🔒 Your images never leave your browser. Processed locally. 100% private.
🧑‍💻 Base64 encoding embeds images directly in HTML, CSS, or JSON without separate file requests. Useful for email templates, small icons, API responses, and offline apps. Note: Base64 output is ~33% larger than the original file.
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Drop image to convert to Base64

JPG, PNG, WebP, SVG, GIF supported - or click to browse

Before / After
Before (original file)
Original image
After (Base64 preview)
Base64 preview
Data URL (for HTML img src)
Raw Base64 (for JSON / API)
CSS background-image
HTML img tag

→ Reverse: Base64 to Image

Paste a Base64 string or Data URL below to preview and download as an image.

What is Base64 Image Encoding?

Base64 encoding converts binary image data into a text string using only 64 safe ASCII characters. This allows embedding image data directly in HTML, CSS, and JSON files without needing a separate image file. A Base64-encoded image in HTML looks like: img src="data:image/jpeg;base64,/9j/...". The string after the comma is the full image as text. Base64 images load without an additional HTTP request since the data is embedded in the document. The significant downside is file size: Base64 encoding increases file size by approximately 33% because three bytes of binary data become four text characters. Common use cases: embedding small icons in CSS, including images in HTML emails that must work without internet access, encoding images for JSON API payloads, and creating self-contained HTML files.

How to Convert Image to Base64

1

Drop Your Image

Drag any image onto the drop zone. Conversion happens instantly using the browser's FileReader API.

2

Copy the Output

Choose the format you need: Data URL for HTML, Raw Base64 for JSON/APIs, or the ready-to-use CSS and HTML snippets.

3

Paste into Your Code

Paste the copied string directly into your HTML, CSS, or JavaScript. No file hosting required.

Frequently Asked Questions

Base64 is a way to represent binary data (like images) as plain text using 64 ASCII characters. This lets you embed images directly in HTML, CSS, or JSON without needing separate image files. The encoded string is about 33% larger than the original binary file.
Base64 is useful for small icons and logos in CSS (avoids extra HTTP requests), images in email templates, images in JSON API responses, and offline web apps that need to bundle assets. Avoid Base64 for large images as it increases HTML or CSS file size significantly.
No. Base64 encoding does not change the image quality. It is just a different way to store and transmit the same binary data. The decoded image is byte-for-byte identical to the original.
Convert your image to Base64 and use the Data URL as the img src: <img src="data:image/jpeg;base64,/9j/4AAQ...">. This embeds the image directly in the HTML file with no external file request needed.
Use the Data URL format: background-image: url('data:image/png;base64,iVBORw0K...'). This embeds the image directly in your CSS file. Best used for small images like icons and patterns to eliminate HTTP requests.

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