How to Use Image ↔ Base64: Complete Step-by-Step Guide
Learn how to use Image ↔ Base64 with our complete step-by-step guide. Includes pro tips, common use cases, and expert best practices for getting the best results.
What Is Image ↔ Base64?
Convert images to Base64 data URIs and decode Base64 strings back into viewable/downloadable images.
How to Use Image ↔ Base64: Step by Step
Follow these simple steps to get started with Image ↔ Base64:
1. Choose a mode: Select 'Encode' to convert an image to Base64, or 'Decode' to convert Base64 back to an image.
2. Upload or paste: Upload an image file to encode, or paste a Base64 data URI to decode.
3. Copy or download: Copy the Base64 string or download the decoded image to your device.
Why Use Image ↔ Base64 Online?
Image ↔ Base64 runs entirely in your browser — no downloads, no uploads, no sign-up required. Your data stays private on your device. It is free to use with no limitations, making it the perfect choice for developers, designers, and professionals who need quick, reliable results without compromising security.
Frequently Asked Questions
What is an image Base64 data URI?▼
A data URI embeds the image data directly as a Base64-encoded string in the format: data:image/png;base64,... This allows embedding images directly in HTML, CSS, or JavaScript without separate HTTP requests.
Is there a file size limit?▼
Since all processing happens in your browser, the limit depends on your device's memory. Typical practical limits are 10-50MB.
What image formats are supported?▼
All common formats: PNG, JPEG/JPG, GIF, SVG, WebP, BMP, and ICO.
Are my images uploaded to a server?▼
No. All image processing happens entirely in your browser using the FileReader API. Your images never leave your device.
How do I decode a Base64 string back to an image?▼
Switch to Decode mode, paste the Base64 data URI (starting with 'data:image/...'), and the tool will display the image with a download option.