1How to use this tool
Easily convert between images and Base64 strings:
- To convert an image to Base64, drag & drop your image or click to select, then copy the generated Base64 string or HTML image tag.
- To decode a Base64 string back to an image, paste the Base64 text in the input area, view the instant preview, and download the reconstructed image.
2Benefits and Use Cases
- Perfect for Devs: Embed small images directly in CSS, HTML, or JSON.
- Instant Preview: Preview the output image in real-time as soon as the string is valid.
Frequently Asked Questions
How are the calculations determined?
We use standard scientific and public formulas (such as WHO standards for health trackers or standardized calendar maths).
Is my inputs data private?
Yes. All personal metrics (age, weight, cycle details) are processed locally and are never stored or tracked by NexToolkit.
Can I use this tool on mobile?
Yes. The UI is designed to be fully responsive and works perfectly on mobile phones, tablets, and desktop computers.