Image to Base64 Converter
Convert any image file to a Base64 data URL instantly. Supports PNG, JPG, GIF, WebP, SVG, and more. Choose HTML, CSS, JSON, or raw output format — and decode Base64 back to an image.
Open Image to Base64 Converter → free, no sign-inBase64 encoding lets you embed images directly in HTML, CSS, or JSON without a separate file request. This tool converts any image file to its Base64 representation in your browser — nothing is uploaded anywhere — and gives you the encoded string in the exact format you need: as a data URL, inside an tag, as a CSS background-image, or as a plain JSON value. There is also a reverse decode mode if you need to check what a Base64 string actually contains.
- ✓Supports PNG, JPG, JPEG, GIF, WebP, SVG, BMP, ICO
- ✓Shows encoded size and ratio vs original (Base64 is always ~33% larger)
- ✓Output formats: data URL, HTML img tag, CSS background-image, JSON value, raw string
- ✓One-click copy for each format
- ✓Thumbnail preview of the uploaded image
- ✓Decode mode: paste a data URL or raw Base64 and download the recovered image
- →Front-end developers embedding small icons or sprites inline
- →Email developers who need inline images that survive email clients stripping external references
- →Developers working with APIs that accept images as Base64 strings
- →Anyone who needs to inspect a mystery data URL
No tutorials. No learning curve. Open it and get started.
No server uploads. Everything runs locally in your browser. Your files and data never leave your device.
Completely free. No trial period. No premium tier for basic functionality. No account required. Use it as often as you need.
One job, done well. Image to Base64 Converter was built to solve a specific problem cleanly. No feature bloat, no ads, no distractions.
- ✓Free — no hidden costs, no premium tier
- ✓No sign-in or account required
- ✓Runs entirely in your browser — no server uploads
- ✓Works on desktop and mobile
- ✓Instant results — no processing delays
Why is the Base64 output larger than my original file?
Base64 encoding expands binary data by roughly 33%. A 100 KB PNG becomes about 133 KB as a Base64 string.
Is my image uploaded to a server?
No — everything runs in your browser. Your image never leaves your device.
Can I decode a Base64 string back to an image?
Yes — switch to Decode mode, paste your data URL or raw Base64, pick the MIME type if needed, and download the recovered image.
What is the difference between a data URL and raw Base64?
A data URL includes the MIME type prefix (e.g. data:image/png;base64,...). Raw Base64 is just the encoded characters with no prefix.
Is this free?
Yes — free with no sign-in.
Free. Instant. No sign-in. Open it and get the job done.
Open Image to Base64 Converter on Doathingy.com →