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  1. Home
  3. Encoders
  5. Image to Base64

Image to Base64 (Vision API)

Encode images for GPT-4V, Claude Vision, and Gemini

IMG
Drop image here, paste, or click to upload
Supports PNG, JPEG, GIF, WebP

Usage Notes

  • OpenAI: Max 20MB, supports PNG, JPEG, GIF, WebP
  • Claude: Max 5MB, best with PNG or JPEG
  • Gemini: Max 4MB per image
  • For best results, resize large images before encoding

Related Tools

  • Base64 Encoder - encode other data types
  • Token Counter - estimate vision token costs
  • Meta Tag Generator - add image previews
  • QR Code Generator - create scannable images
  • Favicon Generator - create icons
  • OG Preview - preview images

Learn the Concepts

📖Base64

How to Use Image to Base64

  1. 1

    Upload an image

    Click to select or drag and drop an image file.

  2. 2

    View Base64 output

    See the image converted to a Base64 data URL string.

  3. 3

    Copy for AI vision APIs

    Click Copy to use the Base64 string with GPT-4 Vision or Claude.

Frequently Asked Questions

Yes, the Image to Base64 converter is completely free with no limitations. Convert images of any size without registration or watermarks.

Yes, all image processing happens locally in your browser. Your images are never uploaded to any server. The Base64 encoding is performed client-side using JavaScript's FileReader API, ensuring complete privacy for sensitive or proprietary images.

The tool supports all common web image formats including PNG, JPEG, GIF, WebP, and SVG. The resulting Base64 string includes the proper data URI prefix (like data:image/png;base64,) making it ready to use directly in HTML, CSS, or AI vision API calls.

Base64-encoded images can be embedded directly in HTML, CSS, or JSON without separate file requests. This is useful for sending images to AI vision APIs (GPT-4V, Claude Vision, Gemini), embedding small icons in stylesheets, or including images in data exports and API payloads.

There is no artificial limit, but Base64 encoding increases file size by about 33%. Very large images may slow down your browser or exceed practical limits for their intended use (like API payload sizes). For AI APIs, check the specific model's image size limits.