Image ↔ Base64

Convert images to Base64 and decode back online free. Supports PNG, JPG, WebP and GIF. Instant results, browser-based, no install.

Image Base64 Converter is a free online tool that encodes images to Base64 strings or decodes Base64 back to images. All conversion happens in your browser — no data is sent to any server. Useful for embedding images inline in HTML/CSS, transmitting image data via APIs, and reducing HTTP requests.

Drag & drop an image or click to select
lock Your files never leave your device

How to use Image ↔ Base64?

  1. Select Image → Base64 or Base64 → Image mode.
  2. Upload an image or paste a Base64 string.
  3. Copy or download the result.

Frequently asked questions about Image ↔ Base64

Where is Base64 encoding used?

It's used for email attachments, inline CSS background images, API data transmission, and more.

How to get the most out of Image ↔ Base64?

  • Base64 encoding increases file size by ~33%, so it's best suited for small icons and logos.
  • Using data URIs in CSS reduces HTTP requests and can improve page loading speed.
  • For large images, serving as regular files is better for caching and performance than Base64.

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