Free online tool to generate base64 encoded placeholder images. Create custom-sized placeholder images instantly with specified width and height in pixels. Perfect for development and testing. All processing happens in your browser.
Creating a base64 placeholder image is simple:
Base64 is an encoding scheme that converts binary data (like images) into ASCII text format. Base64 images can be embedded directly in HTML, CSS, or JavaScript without needing separate image files. This is useful for small images, placeholders, or when you want to reduce HTTP requests.
Base64 placeholder images are incredibly useful for web development. They eliminate the need for external image hosting, reduce HTTP requests, work offline, and are perfect for prototyping and testing layouts before final images are ready.
Base64 is a binary-to-text encoding scheme that represents binary data in ASCII string format. It's commonly used to embed images and other binary files directly in text-based formats like HTML, CSS, or JSON.
Base64 images are best for small images (under 10KB typically). For larger images, regular image files are more efficient. Base64 increases file size by about 33% compared to binary format.
You can generate images of any reasonable size. However, very large base64 strings may cause performance issues. We recommend keeping dimensions under 2000x2000 pixels for optimal performance.