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Image to Base64
- Image to Base64
- Base64 to Image
About This Tool
Image to Base64 is a completely free online image-Base64 conversion tool, converting images to Base64 encoding and vice versa, all processed locally in your browser.
How to Use
- Image to Base64
In the "Image to Base64" tab, click upload to generate Base64 encoding.
- Base64 to Image
In the "Base64 to Image" tab, paste the Base64 text to restore the image.
- Copy or Download
Click "Copy" or "Download" to save the result.
Use Cases
- Embed small icons as Base64 in HTML/CSS to reduce HTTP requests
- Encode images as plain text for transmission in JSON/XML
- Restore Base64 encoding from code or APIs back to images
Key Advantages
- Completely Free
No payment or registration needed; unlimited use.
- Privacy Safe
All processing is done locally; files are never uploaded.
- Bidirectional
Supports both image-to-Base64 and Base64-to-image conversion.
- One-Click Copy
Copy results to clipboard with one click for instant pasting.
- Instant Conversion
Results appear instantly after upload or input, no server wait.
Base64 Encoding Explained
Key facts about Base64 encoding:
| Characteristic | Description | Note |
|---|---|---|
| Size Increase | Encoded size is about 133% of original | Best for small images only |
| Data Prefix | Starts with data:image/png;base64 | Required for web use |
| Privacy | Conversion is fully local | Sensitive images are safe |
FAQ
Base64 encodes binary data using 64 printable characters (A-Z, a-z, 0-9, +, /), commonly used to embed images in text-based contexts.
In the Image to Base64 tab, click upload; encoding is generated automatically. Copy or download the result.
Base64 uses 4 characters to encode 3 bytes, resulting in about 133% of the original size. Not suitable for large images.
Switch to the Base64 to Image tab, paste the encoding, and the tool generates a downloadable image.
All conversion is entirely local in your browser; nothing is uploaded to any server.
Common formats (JPG / PNG / WebP / GIF, etc.) are supported; output matches input format.
Limited by browser memory and text field capacity; recommend keeping each image under 10MB.
Conversion is local; only the initial page load needs a network connection.
Yes. The tool is responsive and works on mobile and tablet browsers.
Directly in HTML img tag src attribute, CSS background-image, or JSON data.
Make sure images are not corrupted; for Base64-to-image, ensure the encoding is complete and valid.
Completely free, no registration needed. Open your browser and start using. Generous daily quota provided.
Content last updated：2026-07-10
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