🖼️ Image to Base64
Convert any image to Base64 data URL — runs in your browser
Drop your image here
or click to browse · JPG, PNG, GIF, WebP, SVG, BMP, ICO
Filename: —
Format: —
Original size: —
Base64 size: —
Dimensions: —
What is Base64 image encoding?
Base64 is a way to represent binary data — like image files — as a plain text string. When applied to images, the result is a data URL: a self-contained text version of the image that can be pasted directly into HTML, CSS, JSON, or email templates. The browser decodes the text and renders the image without ever requesting a separate file from a server.
When to use Base64 images
Good use cases: small icons that ship with a single-page app, inline logos in HTML emails (where external images may be blocked), tiny background images in CSS, embedding images in JSON payloads, or sending images through APIs that only accept text. When to avoid: large photos and hero images — the Base64 string is roughly 33% larger than the original file, doesn't cache separately, and slows down HTML parsing.
How to use the converter
1. Drop or browse an image file
2. The data URL, raw Base64, HTML, and CSS snippets are generated instantly
3. Click the tab for the format you need
4. Click Copy to send it to your clipboard
5. Paste it where you need it — img tag, CSS background, email body, JSON payload
Why use FileTools Image to Base64?
✅ Free — no signup, no spam
✅ 100% private — runs in your browser, image never uploaded
✅ Multiple output formats: data URL, raw Base64, HTML img, CSS background
✅ Preview with file size and dimensions
✅ One-click copy on any format
✅ Supports JPG, PNG, GIF, WebP, SVG, BMP, ICO
Frequently Asked Questions
What is Base64 encoding for images?
Base64 turns binary image data into a text string that browsers can render directly without a separate file request.
When should I use Base64 images?
Small icons and inline assets where avoiding an HTTP request matters. Avoid Base64 for large images — the string is 33% bigger than the file.
Which formats are supported?
JPG, PNG, GIF, WebP, SVG, BMP, and ICO. The data URL preserves the original format in its prefix.
Is my image uploaded to a server?
No. The conversion runs in your browser using the FileReader API. Your image never leaves your device.
How do I use the Base64 string?
Paste the data URL as the src of an img tag, the background-image in CSS, or as an attachment in an email template.