The Image to Base64 tool by PdfPixels encodes an image into a Base64 data URI with HTML, CSS, and JSON snippets. Pick a file and copy the format you need — it runs entirely in your browser.

Image to Base64 encodes any image into a Base64 data URI and formats it as ready-to-paste HTML, CSS, and JSON. Inlining small images removes extra HTTP requests, keeps logos and icons inside a single HTML file, and sidesteps asset-pipeline issues in email templates — at the cost of roughly a third larger markup. Everything runs locally in your browser: the image is read with the FileReader API and never uploaded.

• Data URI, HTML img, CSS url(), and JSON output formats
• Shows the Base64 size overhead versus the original file
• Runs 100% locally — the image never leaves your device
• One-click copy for every format
• Free with no signup and no upload at all

• 1Inlining small logos and icons directly in HTML or CSS
• 2Embedding images in single-file HTML prototypes
• 3Building HTML email templates that survive email clients
• 4Passing images inside JSON payloads to APIs