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Choose encode or decode
Select Image to Base64 when starting from a file, or Base64 to Image when starting from encoded text.
Image ↔ Base64
Convert images to Base64 and back
Encode JPEG, JFIF, PNG, WebP, HEIC, HEIF, AVIF, SVG, BMP and TIFF images as Base64, or decode Base64 back into an image file — all locally in your browser.
Convert image to Base64
Encode an image as a Base64 data URL or raw Base64 text. The file is processed locally in your browser.
Drop an image here
JPEG, JFIF, PNG, WebP, HEIC, HEIF, AVIF, SVG, BMP or TIFF · up to 25 MB
Encode images as Base64 and decode them back to files
Base64 represents binary data as text. For images, it is often used in data URLs, development prototypes, API payloads, HTML or CSS experiments and situations where a small image needs to travel inside a text-based format instead of as a separate file.
Image Toolroom can encode a supported image into Base64 and can also decode Base64 text back into an image file. Both directions run in the browser, making the tool convenient for development and troubleshooting without sending the image content to a conversion service.
How it works
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Convert locally
The browser reads the file or encoded text and creates the corresponding Base64 string or image data.
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Copy or download
Copy the Base64 result for development use or download the decoded image file.
When Base64 is useful
- Base64 makes binary data text-friendly, but it is larger than the original binary file and is not automatically a compression method.
- Data URLs are convenient for small embedded assets, while large Base64 images can make HTML, CSS or JSON unnecessarily heavy.
- Keep the MIME type correct when using a data URL so browsers know how to interpret the encoded image.
- If your goal is only to make an image smaller, use Compress Image rather than Base64 encoding.
Frequently asked questions
Does Base64 compress an image?
No. Base64 is an encoding method, not an image-compression method. The encoded text is usually larger than the original binary data.
What is the difference between raw Base64 and a data URL?
Raw Base64 is only the encoded data. A data URL adds a prefix containing the MIME type and encoding information so it can be used directly in places such as an image source.
Can I decode Base64 back to the original image?
If the Base64 text is valid and represents the original image bytes, decoding reconstructs the image data into a downloadable file.
Why are large Base64 strings inconvenient?
They increase text size, are harder to inspect manually and can make code, API payloads or documents unnecessarily large.
Is my Base64 content sent to a server?
The normal encode and decode workflow runs locally in your browser and does not require sending the content to Image Toolroom.