Image to Base64 Converter — JPG, PNG, GIF, WebP Online
Text · Image · File — URL-safe mode · auto-detect · live image preview — 100% browser-side
Paste text → get Base64
Real-time · No button click · 200ms debounce
Convert any image to a Base64 data URI instantly — drag & drop or click to upload. Supports JPG, PNG, GIF, WebP up to 5 MB. Copy the full data URI for HTML src, CSS background-image, or JSON API payloads. Your image stays in your browser.
What is Base64 Encoding?
Base64 encoding converts binary data into a string of 64 safe ASCII characters — A–Z, a–z, 0–9, +, and /. It is the standard way to embed binary content (images, files, certificates) inside JSON, XML, HTML, and email without breaking the format. The encoded output is ~33% larger than the original.
Standard vs URL-Safe Base64
Standard Base64 uses + and / which have special meaning in URLs. URL-safe Base64 (Base64URL) replaces +→- and /→_ and removes = padding. Use URL-safe mode for JWT tokens, OAuth tokens, and URL query parameters.
Frequently Asked Questions
How do I use a Base64 image in HTML?
Use the data URI as the src attribute: <img src="data:image/png;base64,BASE64HERE" alt="Image">. No separate HTTP request needed. This is ideal for small icons, logos, and images in offline or email HTML.
How do I use a Base64 image in CSS?
Use it as a background-image value: background-image: url("data:image/png;base64,BASE64HERE"). Works in all modern browsers. Best for small images under 10 KB to avoid bloating your CSS file.
What image formats can I convert to Base64?
This tool supports JPG, JPEG, PNG, GIF, WebP, SVG, BMP, and ICO — any image format your browser can read. The file size limit is 5 MB. For larger images, compress them first before encoding.
Does converting an image to Base64 reduce quality?
No — Base64 is lossless encoding. The image data is preserved exactly. Decoding the Base64 back produces the identical original file byte-for-byte. No compression or quality loss occurs during encoding.
Why is my Base64 image string so long?
Base64 increases size by ~33%. A 100 KB PNG becomes ~133 KB in Base64. This is the tradeoff — you get a text-safe string, but at the cost of larger size. For large images, use a CDN URL instead of embedding Base64.