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Image → Base64

Convert an image to a Data URL · drag, paste or pick

Upload image
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Click or drop an image here
Supports PNG / JPG / GIF / SVG / WEBP

Overview: Image → Base64 turns a local image (PNG, JPG, GIF, SVG, WEBP, etc.) into a Base64-encoded Data URL of the form data:image/xxx;base64,..., so you can embed the image directly in HTML, CSS or JSON without an external image hosting service.

How to use: Step 1 — click the drop zone to open a file picker, or drop an image straight onto it. Step 2 — the tool reads the image and converts it to a Base64 Data URL; you can see the preview, filename, original size and the length of the Base64 string. Step 3 — click "Copy DataURL" to place the whole string on the clipboard; paste it into a CSS background: url('...'), an HTML <img src="..."> or a JSON field. Step 4 — click "Clear" to reset and upload another image.

Typical scenarios: Front-end developers reduce HTTP requests by inlining small icons (favicon, button icons) into CSS; embed images in email templates so recipients see them without external links; convert an SVG into a Data URL to use as a CSS background; ship image assets inside Electron apps or Chrome extensions; embed images in Markdown docs to avoid path dependencies; send images as JSON field values to an API.

Technical notes: Conversion uses the browser’s native FileReader.readAsDataURL API. The Base64 string is roughly 4/3 the size of the original file (a 33% overhead). The Data URL auto-detects the MIME type (image/png, image/jpeg, and so on). Keep images under about 100 KB — a big Data URL bloats HTML/CSS and hurts first-paint performance. For SVG, URL-encoding is usually smaller than Base64.

Privacy: Image reading and encoding all happen locally in your browser and are never uploaded, making it safe to use with screenshots, design mockups or product photos that contain sensitive content.

Frequently Asked Questions

How do I use Image → Base64?
Step 2 — the tool reads the image and converts it to a Base64 Data URL; you can see the preview, filename, original size and the length of the Base64 string. Step 3 — click "Copy DataURL" to place the whole string on the clipboard; paste it into a CSS background: url('...') , an HTML <img src="..."> or a JSON field.
What can Image → Base64 do?
Typical scenarios: Front-end developers reduce HTTP requests by inlining small icons (favicon, button icons) into CSS; embed images in email templates so recipients see them without external links; convert an SVG into a Data URL to use as…
Is my data private when I use Image → Base64?
Privacy: Image reading and encoding all happen locally in your browser and are never uploaded, making it safe to use with screenshots, design mockups or product photos that contain sensitive content. Privacy: Image reading and encoding all happen locally in your browser and are never uploaded, making it safe to use…
What technical details should I know about Image → Base64?
The Base64 string is roughly 4/3 the size of the original file (a 33% overhead). The Data URL auto-detects the MIME type ( image/png , image/jpeg , and so on).