Image to Base64 Converter
Controls
Base64 Output
HTML Image Tag
CSS Background
Upload one image and instantly generate the Base64 string, a ready to copy HTML image tag, and CSS background image code, then copy any output or download the Base64 text as a .txt file. No registration is required.
How to Convert Image to Base64
- Click "Select Image" and choose an image file from your device
- The image will be instantly converted to Base64 format
- View the Base64 string, HTML tag, and CSS background code
- Click "Copy to Clipboard" to copy the Base64 string
- Or copy the ready-to-use HTML or CSS code snippets
- Download the Base64 string as a .txt file if needed
Key Features
Instant Conversion
Convert images to Base64 instantly in your browser.
Ready-to-Use Code
Get Base64 string, HTML img tag, and CSS background-image code ready to paste into your projects.
One-Click Copy
Copy Base64 strings, HTML, or CSS with a single click.
Frequently Asked Questions
Converting an image to Base64 turns the file into a text string that can be embedded directly inside code or data files instead of being linked as a separate image file. It is commonly used in HTML, CSS, JSON, email templates, small web assets, prototypes, and apps where an inline image is more convenient than a separate file request.
Base64 is a binary-to-text encoding scheme that converts binary image data into plain text characters. This makes it possible to embed an image directly inside HTML, CSS, JSON, or other text-based formats without storing it as a separate file path or URL.
No. Base64 is a lossless encoding, so the decoded image is identical to the original source file. It does not improve or reduce visual quality, but the encoded text string is usually about 33 percent larger than the original binary file size.
There is no strict built-in hard limit for normal use, but smaller files are much more practical. Keeping images under about 1 MB usually gives the best performance, because very large Base64 strings can slow page rendering, increase document size, and make code harder to manage or debug.
No. All conversion happens locally in your browser using the FileReader API, so your images never leave your device while the Base64 string, HTML tag, and CSS background code are generated.
Yes. Browsers automatically decode Base64 images when they are used in an HTML img tag or CSS background. You can also decode Base64 strings back into image files with programming languages, browser scripts, or other conversion tools when needed.
JPG, PNG, GIF, BMP, WEBP, and SVG are supported. The Base64 output includes the correct MIME type for each format, which makes the generated HTML and CSS snippets ready to use without having to guess the file type manually.