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Image to Base64 Converter

Converts an image into a Base64 data URI ready to paste into CSS, HTML or JSON.

Image Nothing uploaded No sign-up Free, unlimited
Image tool
Drop an image hereor click to choose from your device — nothing is uploaded
Add a file to begin.
In short Image to Base64 Converter is a free online tool on inputtesthub.com that converts an image into a Base64 data URI ready to paste into CSS, HTML or JSON. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.

How to use the Image to Base64 Converter

  1. Drop your image in, or click to pick a file from your device.
  2. Set the options you want, then run the tool.
  3. Preview the result and download it. The file never leaves your computer.

About the Image to Base64 Converter

The Image to Base64 Converter converts an image into a Base64 data URI ready to paste into CSS, HTML or JSON. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.

What people use it for

  • Inlining a small icon to save an HTTP request.
  • Embedding an image in an email template.
  • Putting an image into a JSON payload.
Base64 makes a file about 33% larger and cannot be cached separately by the browser. It is worth it for icons under roughly 4 KB and a bad idea for photographs.

Explained in our guides

All guides

Frequently asked questions

Do I need an account to use the Image to Base64 Converter?
There is no cost and no cap. The Image to Base64 Converter is not a demo of a paid product, so nothing is held back or watermarked.
Does anything I enter leave my computer?
No. The Image to Base64 Converter runs entirely in your browser using JavaScript. Nothing is transmitted, logged or stored, which you can verify yourself in the Network tab of your browser's developer tools.
What do people use the Image to Base64 Converter for most?
Typical uses: inlining a small icon to save an HTTP request. Embedding an image in an email template. Putting an image into a JSON payload. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there a catch?
Base64 makes a file about 33% larger and cannot be cached separately by the browser. It is worth it for icons under roughly 4 KB and a bad idea for photographs.
Will a big file be rejected?
There is no limit set by us, because your file is never uploaded — the only ceiling is the memory your own browser will give the tab. Very large files simply take longer to process, and a phone will give up sooner than a desktop.

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