Image to Base64 Converter
Select a PNG, JPG, WebP, GIF, or SVG image and instantly get its Base64 data URL — fully private, runs in your browser.
Drop files here, browse
PNG, JPG, WebP, GIF, SVG · max 10 MB
Max file size: 10 MB
Browser-Based Encoding
Your image is read locally using the FileReader API and converted to a Base64 data URL entirely inside your browser. Nothing is sent to any server.
What Is Base64?
Base64 encodes binary data (like an image) as ASCII text. It is widely used to embed images directly in HTML, CSS, emails, and JSON without needing a separate file.
Size Warning
Base64 output is about 33% larger than the original file. This tool is ideal for small icons, logos, and web assets — not large photos.
How to convert an image to Base64
- Drop or click to select a PNG, JPG, WebP, GIF, or SVG image (up to 10 MB).
- ConvertForge reads the file locally and encodes it as a Base64 data URL.
- Copy the result or download it as a
.txtfile. - Toggle Show raw Base64 only if you need just the encoded string without the
data:image/…;base64,prefix.
Privacy — processed in your browser
This tool converts images locally in your browser using the native FileReader API. Your image is never sent to any server, logged, or stored anywhere. You can safely convert logos, icons, screenshots, or any private image. Large images can create very long Base64 strings, so small icons, logos, and web assets are usually better use cases than huge photos.
Frequently Asked Questions
Does this upload my image?
No. The entire image-to-base64 conversion runs locally in your browser using the JavaScript FileReader API. Your image file is never sent to any server, never logged, and never stored. You can safely convert private or sensitive images.
What is Base64 used for?
Base64 encoding converts binary data like images into a text representation using only printable ASCII characters. This lets you embed images directly into HTML <img src="data:image/png;base64,…">, CSS background-image: url(…), JSON payloads, email attachments, and API responses — without needing a separate file download.
Can I use the Base64 output in HTML or CSS?
Yes. Use the full data URL directly as an image source in HTML: <img src="data:image/png;base64,iVBORw0K…">. In CSS, use it as a background: background-image: url("data:image/png;base64,…"). For JSON or API use cases, toggle to raw Base64 only and omit the data:…;base64, prefix.
Why is the Base64 text larger than my image file?
Base64 encoding increases the data size by approximately 33% because it encodes every 3 bytes of binary data as 4 ASCII characters. A 100 KB image will produce roughly 137 KB of Base64 text. This overhead is the reason Base64 is best suited for small images like icons, logos, and UI assets rather than large photographs.
Which image formats are supported?
This base64 image encoder supports PNG, JPG/JPEG, WebP, GIF, and SVG — all formats that browsers can natively read via the FileReader API. HEIC, AVIF, TIFF, and other formats are not supported because they require additional native decoding that is not available in all browsers. Use the Image Converter to convert unsupported formats to PNG or JPG first.