Tools & Utilities
Base64 Image Converter
Encode images into Base64 formats or decode Base64 data into a downloadable image.
Private by default. Processing happens in your browser.
- Add your inputChoose a file, paste content, or enter details.
- Choose settingsReview the useful defaults, then adjust if needed.
- Save the resultCopy or download the finished output.
Base64 image workspace
Encode image files or turn Base64 data back into a downloadable image.
One workspace, both directions
Move between image files and Base64 data without uploading sensitive assets.
Encode for your codebase
Create a data URI, raw Base64 string, HTML image, CSS background, or Next.js blurDataURL from one image.
Decode and download
Preview a Base64 image, confirm its format and size, then restore it as a local image file.
Use cases
Where Base64 image encoding is genuinely useful.
- Next.js LQIP: Generate blurDataURL for instant blurred placeholders on
<Image>components. - Email templates: Inline small logos and icons into HTML emails without relying on external image hosting.
- CSS sprites: Embed tiny background icons in CSS files to eliminate network requests for decoration.
- API payloads: Pass images as raw Base64 strings to backend APIs and AI vision models that expect encoded input.
Frequently asked questions
What is a Base64 Data URI?
A Data URI is a way to embed binary file content (like an image) directly inside HTML or CSS as a text string. It starts with `data:image/png;base64,` followed by the encoded binary data, letting you avoid a separate HTTP request for small images.
What is the Next.js blurDataURL for?
blurDataURL is a prop on the Next.js <Image> component that accepts a tiny Base64-encoded image string. It shows as a blurred placeholder while the full image loads (LQIP, or Low Quality Image Placeholder), improving perceived performance.
Can I turn Base64 back into an image?
Yes. Paste a full image data URI or a raw Base64 string, select the MIME type when needed, preview the decoded image, and download it as a file.
Should I use Base64 for all images on my website?
No. Base64 encoding increases file size by ~33% and does not benefit from browser caching. Use it only for very small images (icons, logos <5KB) or LQIP blur placeholders. For larger images, always serve via a CDN or Next.js Image Optimization.
Is my image uploaded to a server?
No. Encoding happens 100% inside your browser using the FileReader API. Your image data never leaves your device.
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