100% Free · No Signup · Browser-based

Convert Image to Base64
String Instantly

Upload any image and get a Base64 string or Data URI in seconds — directly in your browser, nothing uploaded to a server.

🖼️

Drag & Drop your image here

Supports JPG, PNG, GIF, WEBP, SVG, BMP, ICO

Choose File
Preview

Output

Format: —
Size: —
Dimensions: —
Base64 length: —

Why Use Our Image to Base64 Tool?

Fast, private, and packed with export options

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100% Private

Your image never leaves your browser. All processing happens locally on your device.

⚡

Instant Conversion

Convert images of any size to Base64 in milliseconds with no waiting or queues.

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Multiple Formats

Get Data URI, plain Base64, or CSS background-image format ready to paste.

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All Image Types

Supports JPG, PNG, GIF, WEBP, SVG, BMP, and ICO files.

How It Works

Convert in 3 Simple Steps

1

Upload Image

Drag & drop or click to browse your device for any image file.

2

Choose Format

Select Data URI, plain Base64, or CSS background-image output.

3

Copy or Download

Copy the result to clipboard or download as a .txt file instantly.

Frequently Asked Questions

What is Base64 encoding for images?
Base64 encoding converts binary image data into a text string that can be embedded directly in HTML, CSS, or JSON — no separate image file needed. It's widely used for email attachments, data URIs, and API payloads.
Does converting to Base64 increase file size?
Yes, Base64 encoding increases size by approximately 33% compared to the original binary file. For large images, consider whether embedding is the right approach vs. linking to an external URL.
What's the difference between Data URI and plain Base64?
A Data URI includes a prefix like data:image/png;base64, which is required for embedding in HTML/CSS. Plain Base64 is just the raw encoded string without any prefix, useful for APIs or custom implementations.
Is my image uploaded to your server?
No. This tool runs entirely in your browser using the FileReader API. Your image data never leaves your device, ensuring complete privacy.

Image To Base64 — Complete Guide

This free online image to base64 tool is designed to work entirely in your browser — no uploads, no waiting, no software installation needed. It's fast, private, and completely free to use without any account or subscription.

💡 Small images only

Use Base64 for images under 5KB — larger images increase HTML/CSS file size significantly.

💡 Data URI format

The output includes the full data URI (data:image/png;base64,...) for direct use in src attributes.

💡 Email HTML

Base64 images are ideal for HTML emails where external hosting can be blocked by email clients.

💡 SVG icons

Converting small SVG icons to Base64 allows embedding directly in CSS without external file requests.

Converting images to Base64 is a common technique for web developers embedding assets inline in HTML, CSS, emails, and APIs.

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