Image to Base64
No image selected yet. Encoding happens in your browser — the file is never uploaded.
Choose an image, then click Convert to Base64.
728 x 90 In-Content Ad
About This Tool
Image to Base64 is a free online tool that turns an image file into a Base64 text string. Pick a file and the tool encodes it one way only -- image in, text out -- and hands you a data URI you can paste straight into HTML, CSS, JSON or an email template.
Embedding an image as text has a specific payoff: a small logo or icon written into the stylesheet is one fewer network request, an avatar can travel inside a JSON payload, and a signature image survives in an email template that blocks external files. Choose the output style that matches where it is going, from a bare Base64 string to a ready-made img tag. Going the other way? Use the Base64 to Image tool.
The encoding runs in your browser, reading the file you picked and never sending it anywhere. That matters here more than usual, because the images people encode are often private: a client's logo before launch, a scanned signature, a screenshot of an internal dashboard. Nothing is uploaded to this site, and nothing is stored after you close the tab.
How to Use Image to Base64
Choose your image
Click Choose Image and pick a PNG, JPEG, WebP, GIF, SVG or BMP file. A thumbnail appears with the file type and size underneath.
Pick an output style
Choose Data URI, Raw Base64 only, CSS background-image rule or HTML img tag from the Output Style menu, depending on where the string is going.
Convert to Base64
Click Convert to Base64. The string fills the Base64 Output box, and the line above it compares the original file size with the encoded text.
Copy or save the result
Click Copy to put the string on your clipboard, or Download as .txt to keep it in a file. Clear empties the tool for the next image.
Frequently Asked Questions
Yes! All our tools are 100% free to use with no hidden costs, no registration required, and no credit card needed.
Absolutely. All tools run entirely in your browser (client-side). Your data never leaves your device and is not sent to our servers.
Yes, once the page is loaded, the tool will continue to work even if you lose internet connection since it runs in your browser.
Yes! All our tools are free for both personal and commercial use.
Choose the file, pick an output style, and click Convert to Base64. The string appears immediately and is ready to copy. The encoding happens in your browser, so a large file is limited only by your device's memory rather than by an upload cap.
Base64 writes every three bytes of binary data as four text characters, which adds about 33 percent. The tool shows both sizes so the increase is never a surprise. That overhead is why data URIs suit small icons and logos rather than photographs.
A data URI is the whole image written inline as text, beginning with data:image. Browsers treat it as a normal image source. It saves a network request for small assets such as icons, but it inflates the HTML or CSS file it lives in and cannot be cached separately.
Not on this page. This tool only encodes in one direction, image to text. Use the Base64 to Image tool to go the other way: paste the string there and it decodes to a viewable, downloadable file. The two directions are kept on separate pages on purpose.
Yes. The file is encoded from its original bytes rather than redrawn on a canvas, so an SVG stays a vector and an animated GIF keeps its frames. That is the practical difference from tools that rasterise everything to PNG before encoding it.
Anywhere a text image source is accepted: an HTML img tag, a CSS background-image rule, a JSON field, a Markdown file or an email template. Pick the matching output style and the tool wraps the string in the right syntax for you.