Image to Base64
Upload any image and convert it to a Base64 data URL ready for HTML, CSS, or JSON — free online converter supporting PNG, JPEG, SVG, WebP. No server upload.
Updated March 2026
Low Latency Encoding
Asynchronous processing handles large files without blocking the UI.
Local Processing
Assets are encoded in-browser. Data never leaves your machine.
Data URI Support
Directly generate CSS, HTML, and Data URL ready string formats.
How to convert an image to Base64
Four output formats, one click to copy
1. Drop the image
PNG, JPG, GIF, SVG, or WebP up to 20 MB — drag and drop or click to browse.
2. Pick the output format
Raw Base64, Data URL, HTML `<img>`, or CSS `url()`.
3. Copy the result
Click Copy or press Shift+Enter to grab the encoded string.
What this Base64 image encoder does
More than just spitting out a string
Four output formats
Raw Base64, a full data URL, a ready-to-paste <img> tag, or a CSS url() value.
Shows image metadata
Dimensions, original file size, and encoded size, all before you copy anything.
Zoomable preview
Check the image visually before embedding it in your code.
Runs entirely in your browser
Uses the FileReader API — your image never leaves the device, and it works offline once loaded.
Examples
When you'll reach for this tool
The most common scenarios among people converting images to Base64
Cut HTTP requests
Small icons and logos (under 5–10 KB) load inline with the HTML/CSS, skipping an extra network round trip.
Self-contained HTML
Single-file demos, email templates, or offline docs work with zero external dependencies.
Images in email
Many email clients block remote images but render inline data URLs without issue.
API payloads
Webhooks and REST APIs that transfer images usually expect a Base64 string in the request body.
Canvas and WebGL
Base64 strings sidestep the CORS restrictions that apply to externally hosted images.
Going the other way
To paste Base64 and view the image, use [Base64 to Image](/en/tools/base64-to-image).
Common questions
Image too large to embed
Above a few KB, hosting the file separately usually beats inlining it as Base64.
Quality doesn't change
Base64 is lossless — the string represents exactly the same pixels as the original file.
Why encode here
Every conversion happens in the browser with the FileReader API — your image never leaves the device, and the tool keeps working offline once the page has loaded.
The four output formats skip the manual step of hand-building the <img> tag or the CSS url() value — just copy the format you need and paste it straight into your code.
Frequently asked questions
Use the data URL output and paste it as the src of an <img> tag, or pick the HTML <img> output format directly — the tool already generates the full tag for you.
References
Related Tools
- Base64 to Image Developer Paste a Base64 string or data URL and instantly preview the decoded image — free online converter supporting PNG, JPEG, WebP, GIF, SVG. No upload, runs locally.
- Base64 Encoder Developer Encode any text or string to Base64 instantly in your browser. Supports UTF-8, shows character count and output payload size. Free, no signup, 100% client-side.
- Base64 Decoder Developer Free online Base64 decoder — decode Base64 strings back to plain text instantly in your browser. Validates input and shows decoded payload size.
- HTML Entity Encoder Developer Encode text to HTML entities online — escape special characters like <, >, &, and " instantly in your browser. No install needed.
- URL Encoder Developer Encode any URL or text to percent-encoding instantly in your browser. Follows RFC 3986. Free, no sign-up required.
