在线免费Base64转图片
解码Base64字符串并预览或下载图片。
Frequently Asked Questions
What should a Base64 image string look like?
A complete data URI looks like: data:image/png;base64,iVBORw0KGgo... You can also paste just the raw Base64 string without the prefix and the tool will detect the image type automatically.
Why is my Base64 image not decoding correctly?
Common issues: truncated string (incomplete copy-paste), extra whitespace or newline characters in the string, incorrect charset prefix. Make sure you copy the complete Base64 string without line breaks.
Can I convert a Base64 string to any image format?
The output format depends on what was encoded. data:image/jpeg;base64,... decodes to JPG; data:image/png;base64,... decodes to PNG; data:image/webp;base64,... decodes to WebP.
What is Base64 image encoding used for?
Base64 images appear in: HTML/CSS data URIs (embedded images without HTTP requests), JSON API responses returning images as strings, email HTML templates with inline images, and database storage of small images as text.
Is there a size limit on the Base64 string I can decode?
The tool handles Base64 strings up to approximately 20 MB (representing ~15 MB images). Larger strings may cause browser memory issues. For very large images, use a desktop tool or command-line base64 decode.
Is the Base64转图片 free to use?
Yes, the Base64转图片 on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.
How does the Base64转图片 work?
解码Base64字符串并预览或下载图片。 No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.
Do I need to install anything to use the Base64转图片?
No installation needed. The Base64转图片 runs entirely in your web browser on any device — desktop, tablet, or mobile.
Is my data safe when using the Base64转图片?
Completely safe. The Base64转图片 processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.
Does the Base64转图片 work offline?
After the page loads for the first time, the Base64转图片 works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or network lookups) require an active connection.
What image formats does the Base64转图片 support?
The Base64转图片 works with common image formats supported by your browser, including JPEG, PNG, WebP, and GIF. SVG support varies by tool. No format conversion plugin or driver is needed.
Does the Base64转图片 work with large image files?
Yes. The Base64转图片 processes files entirely in your browser using the Canvas API. Very large files (over 20 MB) may take a few extra seconds on older or lower-powered devices. Closing other tabs can free up memory for better performance.
Does the Base64转图片 work on all browsers?
Yes. The Base64转图片 is built with standard browser APIs and works on all modern browsers including Chrome, Firefox, Safari, and Edge — on both desktop and mobile. No plugins, extensions, or third-party software are required.
How do I save or export my results from the Base64转图片?
Select and copy the result text to paste into any document or app. For image tools, a Download button saves the file directly to your device. Your browser's built-in screenshot function also captures results quickly. No account or login is required.