Online Image to Base64 Encoder

Convert images into Base64 strings or complete data URIs for HTML, CSS, JSON payloads, emails, and API testing. The encoder runs locally in your browser, so your image is not uploaded.

Features:

• Base64 Output: Copy the plain encoded string for code and data storage.
• Data URI Output: Generate a ready-to-use image source for HTML and CSS.
• Image Preview: Confirm the selected file before copying the output.
• Output Details: View file type, size, and encoded character length.
• Download TXT: Save the generated output as a text file.

1. When Base64 Images Are Useful

Base64 is helpful for small icons, placeholders, embedded email images, test fixtures, and API payload examples where a separate image file is inconvenient.

2. Base64 Size Considerations

Base64 usually increases file size, so large images are often better served as normal image files. Use this tool mainly for small assets and development workflows.