Free Base64 to Image Converter that works offline
Paste a complete image data URL or raw Base64 text to recreate an image in your browser. The decoder validates the payload, detects common raster formats and creates a local preview and download without sending the content anywhere.
What this base64 to image converter does
A Base64 image is binary image data represented with printable text. A complete data URL includes a MIME prefix such as data:image/png;base64, while raw Base64 contains only the encoded bytes. This tool can use the prefix or identify common file signatures when the prefix is absent. Base64 is encoding rather than encryption, and the decoded bytes are handled only in the current browser tab.
How to use the Base64 to Image Converter
- Paste a complete image data URL or raw Base64 into the input field.
- Leave format detection on automatic, or select the expected format for raw Base64.
- Choose Preview image and verify the decoded dimensions and file type.
- Download the recreated image file or clear the input when finished.
Common uses
- Recovering a PNG or JPEG from an API response or test fixture
- Previewing image data embedded in HTML, CSS or JSON
- Turning a copied data URL back into a downloadable file
- Checking whether an image Base64 payload is complete and valid
Private processing and offline access
This tool does not submit your input to a conversion server. Processing takes place inside the browser using local JavaScript and standard Web APIs. After the PWA has been installed or cached, the page and its core features remain available without an internet connection. Closing or clearing the page removes unsaved input; the tool does not create an account or cloud history.
Tips for accurate results
- Keep the data:image/...;base64, prefix when available because it identifies the format.
- Do not treat Base64 as secret or encrypted content.
- Large images are better transferred as files because Base64 adds roughly one third to the size.
Frequently asked questions
Does the Base64 image leave my device?
No. Decoding, preview and file creation happen locally in the browser.
Can I paste raw Base64 without a data URL prefix?
Yes. Automatic detection recognizes common raster signatures, and a format selector is available when detection is not possible.
Which image formats are supported?
The tool accepts common raster formats including PNG, JPEG, WebP, GIF, BMP, AVIF and ICO when the current browser can display them.
Why is SVG not accepted?
The decoder intentionally limits output to raster image formats to avoid treating active SVG markup as an ordinary image payload.