15 MiB, 16 megapixels and 16,384 pixels per side.

What should I check before using the output?

Base64 increases size by about one third. This is encoding, not compression or encryption.

Image to Base64

Encode validated image bytes as Base64 or a data URL.

JPEG, PNG or WebP image

15 MiB and 16 megapixel guardrails. Original file bytes are encoded; Base64 is about one third larger.

Output

Converters Local processing

Encode a JPEG, PNG or still WebP as raw Base64, a data URL, CSS or HTML. The encoded data preserves the selected file bytes.

Choose a supported image.

Select the required output form.

Copy or download the encoded text.

Inputs are processed in your browser. Analytics and advertising can make separate network requests.

What are the limits?: 15 MiB, 16 megapixels and 16,384 pixels per side.
What should I check before using the output?: Base64 increases size by about one third. This is encoding, not compression or encryption.