What is a Base64 image?
A Base64 image is image binary data encoded as text. It is commonly used in HTML, CSS, JSON, API responses, and email templates.
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FAQ
Answers about Base64, image and PDF converters, browser privacy, supported formats, file limits and common errors.
Is Base64 secure?
Base64 is encoding, not encryption. Anyone can decode it, so it should not be used to hide sensitive information.
Is this converter secure?
Yes. All conversions happen locally in your browser. Files never leave your device.
Does Base64 increase image size?
Yes. Base64 output is usually about 33% larger than the original binary file.
Does Base64 reduce image quality?
No. Base64 encoding does not change the original image quality. It only changes how the same binary data is represented.
What is the maximum Base64 size?
This app is designed for images up to 10 MB. Very large strings may be slower because decoding happens in browser memory.
PNG vs JPG Base64: what should I use?
Use PNG for transparent graphics, screenshots, logos, and UI images. Use JPG for photos and smaller file sizes.
How to decode Base64 online?
Paste the Base64 string or data URL into the Base64 to Image converter, click convert, then preview and download the image.
How to convert byte array to image?
Open Bytes to Image, paste a byte array such as [137,80,78,71,...], and the tool will convert it into a previewable image.
How to decode blob image?
Convert the blob into a byte array or Base64 string, then use Bytes to Image or Base64 to Image to preview and download it.
What formats are supported?
JPG, JPEG, PNG, GIF, BMP, TIFF, SVG, WEBP, AVIF and ICO are supported.
Raw byte workflow
Convert bytes to image
Need to convert a byte array or blob image?
Open Bytes to Image for Uint8Array, Buffer, hexadecimal values and decimal byte arrays. Processing stays in your browser.