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Image to Base64 Converter

Convert images to Base64 strings for embedding in HTML, CSS, and JavaScript

Click to upload or drag & drop image
Any image format supported
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What is Image to Base64?

Free image to Base64 converter. Convert any image to Base64 string for CSS, HTML and JavaScript embedding. Instant, no server upload. Browser-based image tools — no upload to servers, all processing done locally. TekPulse's Image to Base64 is completely free — no signup, no ads in results, and no data stored on our servers.

How to Use Image to Base64 Online

  1. Upload your image (JPG, PNG, WebP, GIF, SVG, or BMP)
  2. The Base64 data URI is generated instantly (e.g. data:image/png;base64,...)
  3. Copy the full data URI for embedding directly in HTML <img src="..."> or CSS background-image
  4. Use the CSS snippet tab to get ready-to-paste CSS code
  5. Note: Base64 encoding increases file size by approximately 33% — use it for small images only

Why Use TekPulse Image to Base64?

Runs Entirely in Your Browser
Uses the browser's built-in FileReader API — your image is never uploaded
Instant Results
Base64 output appears as soon as you pick a file
100% Free
No hidden charges, no premium tier — always free
Mobile-Friendly
Works perfectly on smartphones, tablets, and desktops

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Frequently Asked Questions

A data URI embeds file data directly in HTML or CSS using the format: data:[mediatype];base64,[encoded-data]. Example: <img src="data:image/png;base64,iVBOR..."> displays an image without a separate file request.

Use Base64 images for: small icons/logos to reduce HTTP requests, email HTML (some clients block external images), offline-capable pages, and critical above-the-fold images. Avoid for large images — they increase HTML size significantly.

Yes — Base64 encoding increases file size by approximately 33% because it converts every 3 bytes of binary data into 4 ASCII characters. A 100KB image becomes ~133KB as Base64.

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