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Image to Base64
Convert images to Base64 strings or decode Base64 back to images, embeddable in HTML/CSS.
How to use: 3 simple steps
Step 1
Upload image
Drag & drop or click to select an image.
Step 2
Adjust options
Tweak options and preview live.
Step 3
Download
Click download to save the result.
Key features
Privacy first
Images are processed entirely in your browser, never uploaded.
Instant
Processed on upload, results in seconds.
Completely free
Free to use, no watermark, no limits.
FAQ
What is image-to-Base64 used for?
Base64 strings embed directly into HTML, CSS and JSON without separate image files — great for small icons, avatars, email signatures, mini-program assets and API transfers, reducing HTTP requests.
How do I convert an image to a Base64 string?
Upload; the full Base64 string (with the data:image prefix) generates automatically. Click Copy and paste into your code. Everything runs locally.
How do I restore a Base64 string to an image?
Paste the string (with the data:image prefix) into the box and click Decode. The tool parses and previews the image for download.
Does Base64 make the file bigger?
Yes, by about 33%. It suits small images (icons, thumbnails, avatars); large images should stay as files to avoid bloating HTML and slowing load.
Is online Base64 conversion safe?
Safe. Conversion happens locally; image data never uploads, suitable for unpublished assets and API testing.
When is image-to-Base64 most useful?
Frontend icon embedding, email signature images, mini-program assets, API image transfer and storing small images in databases.
Are there limits on free use?
No. Free, no registration, unlimited, large files supported, with one-click copy and download.
Which formats are supported?
All common formats: PNG, JPG, GIF, WebP, SVG, ICO. SVG-to-Base64 is especially handy for inline frontend use.