useonlinetools

Image to Base64

Turn any image into a Base64 data URI — embed directly in HTML, CSS, or JSON, all done locally on your device.

Drop an image here
PNG, JPEG, GIF, WebP — up to 10 MB
Your image is read locally using FileReader — nothing is ever uploaded.
how to use

How to convert an image to Base64

1

Upload your image

Drop a PNG, JPEG, or GIF into the tool. It's read locally using the FileReader API — nothing is uploaded.

2

Encode

The image is converted to a Base64 string in your browser. The output is a complete data URI you can paste anywhere.

3

Copy

Click copy to grab the full data URI string. Paste it into an <img src="...">, a CSS background-image, or a JSON payload.

4

Use anywhere

Base64-encoded images are self-contained — they don't need a separate file, making them perfect for single-file HTML demos, email templates, and API payloads.

about this tool

Image to Base64 without giving up your privacy

Online tools often ask you to upload your files before processing them. For anything sensitive — contracts, statements, personal documents — that's a real privacy concern. This tool takes a different route: everything runs entirely in your browser. Your files are opened locally, processed in your device's memory, and handed back to you. No copy is ever transmitted to a server, which means it works offline too.

Privacy by design. This tool loads once and runs entirely in your browser tab. Close the tab and nothing remains. No cookies, no tracking, no server — just the utility you need, instantly.

faq

Image to Base64 — frequently asked questions

No. All processing happens entirely inside your browser. Your files are read locally, processed in your device's memory, and handed back as a download — nothing is transmitted anywhere.
No. There's no sign-up, no email, and no paywall. Open the tool, process your files, and download — that's the entire flow.
No fixed cap. Because everything runs locally, the practical limit is your device's available memory. Most people process files up to hundreds of megabytes without any issue.
Yes. Once the page loads, the entire tool runs in your browser and works without an internet connection — perfect for planes, secure environments, or anywhere with limited connectivity.
No. The tool preserves your files exactly as they are. No quality loss, no compression artifacts, no modification unless you explicitly choose to apply changes.

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