Developer utility
Standalone tool pageBase64 Image Encoder & Decoder
Encode local images into Base64 strings or decode Base64 back into downloadable image files instantly.
Base64 Image Encoder & Decoder
Base64 output
Preview
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How It Works
Upload an image to convert it into a Base64 data URL, or paste a Base64 string to decode it back into an image preview. The app handles everything in-browser, so you can copy the output or download the restored image immediately.
Example
Upload a PNG logo and the tool generates a data:image/png;base64,... string you can paste into HTML or CSS. Or paste a Base64 API response and instantly preview and download the decoded image.
When to use this tool
- When you need to embed a small image into code or API payloads.
- When debugging an existing Base64 image string from a backend response.
- When converting screenshots, icons, or logos into inline assets quickly.
Why convert images to Base64
- Embed images directly in HTML, CSS, Markdown, or JSON payloads.
- Quickly test data URLs in prototypes and frontend development.
- Inspect or move image content without a separate file upload flow.
What this tool supports
- Local image upload with drag-and-drop support.
- Base64 decode with inline preview and direct image download.
- Copy-ready data URLs for fast frontend reuse.
Frequently Asked Questions
What is Base64 image encoding used for?
Base64 image encoding converts image binary data into text so it can be embedded in HTML, CSS, JSON, or API payloads without uploading the file separately.
Can I decode a Base64 image string back into an image file?
Yes. Paste a valid Base64 image string and the tool will render a preview and let you download the decoded image locally.
Does this tool upload my image?
No. Encoding and decoding happen entirely inside your browser. Your files and Base64 strings never leave your device.
Do I need the full data URL prefix?
No. You can paste a full data URL like data:image/png;base64,... or only the raw Base64 string. The decoder normalizes it automatically.
When should I avoid Base64 images?
Base64 increases file size compared with the binary source, so it is best for small inline assets, previews, or transport cases—not large production images.