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Read more→Base64 Image Encoder & Decoder
Convert images to Base64 data URIs and decode back for free. Copy as CSS background-image, HTML img tag, or raw Base64. No file uploads, 100% browser-based privacy.
Processing: local in your browser
Free Base64 Image Encoder & Decoder
Convert images to Base64 data URIs and decode them back to the original format. Copy the result as a CSS background-image, HTML img tag, or raw Base64 string. Processing occurs in the browser without uploading the image to ToolsFree.
What is Base64 Encoding
Base64 is an encoding scheme that converts binary data (like images) into an ASCII text string. It uses 64 characters (A-Z, a-z, 0-9, +, /) to represent the data, which allows you to embed images directly in HTML, CSS, or JSON without needing separate files.
When to Use Base64 for Images
Base64 is ideal for embedding small images (icons, logos, sprites) directly in CSS or HTML, eliminating extra HTTP requests and improving initial load performance. However, Base64 increases file size by 33%, so for larger images it is more efficient to use conventional files with modern formats like WebP or AVIF.
Privacy & Security
Conversion uses the browser's FileReader and Canvas APIs without uploading the image to ToolsFree. Device and extension security still matters for sensitive files.
Frequently Asked Questions
- What is Base64 encoding?
- Base64 is an encoding scheme that converts binary data (like images) into ASCII text. This allows embedding images directly into HTML or CSS as data URIs.
- Does Base64 increase file size?
- Yes, Base64 encoding increases size by approximately 33%. It's ideal for small images (icons, logos) but not recommended for large images.
- Are my images uploaded to any server?
- No, the conversion happens entirely in your browser. Your images never leave your device.
- What formats does it support?
- It works with PNG, JPEG, GIF, SVG, WebP, and most image formats. The result can be copied as a data URI for CSS or HTML.
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