Image to Base64 Converter Online – Encode Images to Base64 Instantly Free

Free Online Tool

Image to Base64 Converter

Convert images into Base64 encoded strings instantly in your browser. Supports JPG, PNG, WebP, GIF and more — with copy, download, and bulk conversion options.

100% Client-Side Instant Encoding No Upload Bulk Support

All image encoding is performed entirely in your browser. No files are uploaded or stored on any server.

Upload Images

Drag & Drop Images Here

or click to browse · JPG, PNG, WebP, GIF · Up to 20 images

0 images selected
—

Options

Include Data URI prefix

Adds data:image/jpeg;base64, — use directly in HTML/CSS. Disable for raw Base64 only.

Trim whitespace from output

Removes line breaks for a single continuous string.

Encoding Images

0%

Initializing...

All images encoded successfully!

Encoded Output

—

1 / 1

Preview will appear here after conversion...

Download & Copy Base64 String

Current image output size: —

How To Convert Image to Base64

1

Upload Your Image(s)

Drag and drop images into the upload area, or click to browse. You can select up to 20 images at once. Supports JPG, PNG, WebP, GIF, BMP, and SVG formats.

2

Configure Options

Choose whether to include the Data URI prefix (for direct use in HTML img tags or CSS backgrounds) or get raw Base64 only. Enable trim to remove whitespace for a single continuous string.

3

Click Convert to Base64

Hit the convert button to start encoding. Each image is read and encoded using the FileReader API entirely in your browser with zero server interaction.

4

Copy or Download the Base64 String

Switch to the "Base64 String" tab to see the full encoded text. Use the prominent buttons below to copy to clipboard, download as .txt, .html, or .json. For multiple images, navigate between results using the arrow buttons.

5

Download or Reuse the Encoded Data

Download as .txt for plain text storage, .html for a previewable webpage with the image embedded, or .json for use in applications and APIs. Use the Base64 string directly in HTML, CSS, JavaScript, or any application that accepts Base64 data URIs.

Frequently Asked Questions

Base64 is a binary-to-text encoding scheme that represents binary data (like images) as an ASCII string. It converts every 3 bytes of binary data into 4 ASCII characters, making it safe to embed in text-based formats like HTML, CSS, JSON, and XML.

Yes, completely free with no limits, no watermarks, no sign-ups, and no hidden charges. Convert as many images as you need.

A Data URI prefix is the part that tells the browser how to interpret the Base64 data. For example, data:image/png;base64, tells the browser it's a PNG image in Base64 format. Enable "Include Data URI prefix" to get a string you can directly paste into an HTML <img src="..."> tag or a CSS background-image property.

Base64 encoding increases data size by approximately 33% (3 bytes become 4 characters). A 100 KB image will produce roughly 133 KB of Base64 text. This is normal and unavoidable — it's the trade-off for being able to embed binary data in text formats.

Yes, up to 20 images per batch. After conversion, use the arrow buttons to navigate between images in the preview and copy or download each Base64 string individually. Use "Download ALL as .txt" to get all encoded strings in a single file.

JPG/JPEG, PNG, WebP, GIF, BMP, and SVG are all supported. The Data URI prefix is automatically set based on the image's MIME type (e.g., data:image/png;base64, for PNG files).

By default, the browser may add line breaks in the Base64 string for very large images. "Trim Whitespace" removes all line breaks and extra spaces, producing a single continuous string. This is useful when pasting into JSON files or code where line breaks would cause errors.

Absolutely. Your images never leave your device. All encoding happens locally in your browser using the FileReader API. No files are uploaded to any server, nothing is stored, and no one else can access your data.

In HTML: <img src="data:image/png;base64,iVBOR..." alt="My Image">
In CSS: background-image: url("data:image/png;base64,iVBOR...");
Make sure to include the Data URI prefix when using these options.

Yes. Upload images from your photo library, convert, preview, copy, and download — all from a mobile browser. The layout stacks vertically on small screens with full-width buttons.

Convert images to Base64 instantly — fast, secure, and 100% client-side.

Image to Base64 Converter · Convert Image to Base64 Online · Base64 Encoder Tool · Image to Data URL · Free Base64 Image Converter