Base64 to Image Converter

Convert a Base64 string or data URI back to a downloadable image. Auto-detects format, shows preview, and lets you download as PNG, JPG, or WebP.

Paste Base64 String

Accepts both data URIs (data:image/png;base64,...) and raw base64 strings.

How to Decode a Base64 Image

Paste a base64-encoded string into the input field and the tool instantly decodes it back into a viewable image. It automatically detects the image format from the data URI prefix (PNG, JPEG, GIF, WebP, or SVG) and displays a preview you can download.

If your string includes the full data URI prefix like data:image/png;base64,... the format is detected automatically. If you paste just the raw base64 characters without a prefix, the tool will attempt to identify the format from the decoded binary data. Most common image formats are recognised without any manual configuration.

When Would You Need to Decode Base64 Images?

You will encounter base64-encoded images when inspecting HTML emails, debugging API responses that return image data inline, extracting embedded assets from single-file HTML exports, or working with data URIs found in stylesheets and JSON payloads.

Developers often need to decode base64 images during debugging to verify that an API is returning the correct image. Designers may extract embedded logos or icons from HTML email templates. Security researchers inspect base64 payloads to check for unexpected content. In all these cases, being able to quickly decode and preview the image saves time.

Frequently Asked Questions

What image formats can be decoded from base64?

Any image format that was originally encoded to base64 can be decoded back. The most common formats are PNG, JPEG, GIF, WebP, and SVG. The tool reads the data URI prefix to determine the format. If no prefix is present, it analyses the binary header to identify the image type.

Why does my base64 string not decode correctly?

The most common issues are incomplete strings (if the base64 text was truncated during copying), extra whitespace or line breaks inserted by email clients or code formatters, and missing or incorrect data URI prefixes. Try removing any whitespace and ensuring the full string is pasted.

Does the image get uploaded anywhere?

No. The decoding happens entirely in your browser. The base64 string is converted to binary data locally using JavaScript, and the resulting image is displayed without any server communication.

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