Image to Base64 — Convert JPG, PNG & WebP to Base64 Online
Convert images to Base64 data URIs instantly. Open JPG, PNG, WebP and get data URLs for embedding in HTML, CSS, or JSON. Browser-based, no uploads.
Features
- ✓Convert images to Base64 data URIs — JPG, PNG, WebP, GIF, SVG, and more
- ✓Drag and drop images directly into the browser
- ✓Copy Base64 string to clipboard with one click
- ✓Save the Base64 data as a .txt file
- ✓Preview the opened image before conversion
- ✓See the original file size and the Base64 string length
- ✓Decode Base64 strings back into savable images
- ✓No file size limits — all processing is local in your browser
- ✓Works offline — no data ever sent to a server
- ✓Perfect for embedding images in HTML <img> tags, CSS background-url, or JSON payloads
How to Use
- 1Open an image by clicking the file area or dragging and dropping a file.
- 2View the image preview and file details (name, size, type).
- 3Copy the generated Base64 data URI using the copy button.
- 4Paste the Base64 string directly into HTML: <img src="data:image/png;base64,..." />
- 5Use in CSS: background-image: url('data:image/png;base64,...');
- 6Use in JSON APIs to send image data as a string payload.
- 7Decode: paste a Base64 string into the decode area to preview and save the image.
- 8Convert multiple images one at a time — each conversion is instant.
- 9Save the Base64 output as a .txt file for later use.
- 10Reduce image dimensions first in our image resizer tool to get shorter Base64 strings.
Frequently Asked Questions
What is Base64 encoding?
∨
Base64 is a binary-to-text encoding that represents binary data in an ASCII string format. It's commonly used to embed images directly into HTML, CSS, and JSON without separate file requests.
How do I embed an image in HTML using Base64?
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Use the data URI as the src attribute: <img src="data:image/png;base64,YOUR_BASE64_STRING" alt="description" />. Copy the full string from this tool and paste it.
Does Base64 increase file size?
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Yes, Base64 encoding increases the file size by approximately 33%. Use Base64 embedding for small images (icons, logos) where the extra HTTP request overhead outweighs the size increase.
What image formats are supported?
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All common formats: JPG, PNG, WebP, GIF, SVG, BMP, ICO, and AVIF. The output data URI will automatically include the correct MIME type.
Is there a file size limit?
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No limit — the conversion runs entirely in your browser using JavaScript's FileReader API. However, very large files produce long Base64 strings that may be impractical to embed.
Can I decode Base64 back to an image?
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Yes. Paste a Base64 data URI into the decode area to preview the image and save it as the original format.
Is my image data safe?
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Yes. All processing happens locally in your browser using JavaScript's FileReader API. No image data is sent to any server.
When should I use Base64 vs a file URL?
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Use Base64 for small, inline images that you want to embed directly (favicons, tiny icons, email signatures). Use file URLs for larger images to avoid inflating HTML/CSS/JSON size.
What is a data URI?
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A data URI is a URL that starts with 'data:' followed by the MIME type and the actual data encoded as Base64. It allows embedding data directly in web documents without external resources.
Can I convert video or audio to Base64?
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This tool is designed for images. For other file types, use our general Base64 Encode tool which supports any text or binary data.
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