Image to Base64 Converter

Image to Base64 Converter | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Design
Input types: file, select, checkbox, number
Output type: text
Sample coverage: 4
API ready: Yes

Overview

The Image to Base64 Converter allows you to quickly transform image files into Base64 encoded strings, making it easy to embed graphics directly into your HTML, CSS, or JSON files without external dependencies.

When to use

Embedding small icons or logos directly into your CSS or HTML to reduce HTTP requests.
Storing image data within a database or JSON configuration file.
Preparing image assets for transmission via APIs that require text-based data formats.

How it works

1Upload your image file (JPEG, PNG, WebP, or GIF) using the file selector.
2Adjust optional settings like output format, dimensions, or the inclusion of the Data URI prefix.
3Click convert to generate the Base64 string, which you can then copy directly to your clipboard.

Use cases

Optimizing web performance by inlining critical small images.
Generating base64 strings for CSS background-image properties.
Embedding profile avatars directly into user profile JSON objects.

Examples

1. Inlining a Logo for Email Templates

Web Developer

Background

The developer needs to include a company logo in a transactional email template that does not support external image hosting.

Problem

The image must be embedded directly into the HTML code to ensure it displays correctly in all email clients.

How to use

Upload the logo file, ensure 'Include Data URI Prefix' is checked, and click convert.

Include Data URI Prefix: true

Outcome

A complete Base64 string ready to be pasted into an <img src='...'> tag.

2. Optimizing Icons for CSS

Frontend Designer

Background

A designer wants to reduce the number of server requests for a landing page by inlining small UI icons.

Problem

The icons are too large and need to be resized to fit the design system before being converted.

How to use

Upload the icon, set the Max Width to 32px, and convert to Base64.

FAQ

What image formats are supported?

The tool supports JPEG, PNG, WebP, and GIF formats.

What is the 'Include Data URI Prefix' option?

When enabled, it adds the 'data:image/...;base64,' header to your string, which is required for direct use in HTML 'src' attributes or CSS 'url()' properties.

Is there a file size limit?

Yes, the tool supports files up to 10MB.

Can I resize the image during conversion?

Yes, you can specify a maximum width or height in pixels to scale the image before encoding.

Is my image data stored on your server?

No, all processing is performed locally in your browser to ensure your data remains private.

Max Width: 32, Include Data URI Prefix: true

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Examples that match this tool

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Inputs

Result

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Inlining a Logo for Email Templates

2. Optimizing Icons for CSS

FAQ

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