Image to Base64 Converter Online
Upload any image and turn it into a Base64 string or data URI. Copy the code for HTML, CSS, or JSON, or download it — all inside your browser.
How to Convert an Image to Base64
Open the tool and switch to Image to Base64. Drop in a picture, preview it, then copy the Base64 string or data URI with one click.
Step 1
Open Encoder
Switch to Image to Base64 and the upload area appears, ready for your picture.
Step 2
Upload Image
Drop in a PNG, JPEG, WebP, GIF, SVG, AVIF, HEIC, BMP or ICO file to encode.
Step 3
Copy or Save
Preview the result, copy the Base64 string, or download it as a .txt file.
Free Online Image to Base64 Converter to Encode Any Image into a Base64 String
An image to Base64 converter encodes a picture into a text string so it can live anywhere text is accepted. Rather than hosting a separate image file, you turn the image bytes into Base64 and embed them directly in HTML, CSS, JSON, or an email. The browser then renders that string as if it were a normal image source. For front-end developers, email designers, and anyone building offline or self-contained apps, encoding an image to Base64 removes external dependencies and keeps assets bundled neatly inside the code that uses them. This keeps assets and code in the same place, easy to ship.
The classic use cases are small, critical assets. A favicon, a logo, a loading spinner, or a UI icon can be inlined as a data URI so it appears with zero extra HTTP requests. Email clients frequently block external images, so embedding them as Base64 guarantees they display without the recipient clicking show images. JSON and REST APIs can carry image previews as strings instead of multipart uploads, and offline documents or PWAs can bundle images directly in code. Base64 adds roughly 33 percent overhead, so it suits icons and thumbnails rather than large hero photos — but for those small assets it is ideal. For newsletters and embedded widgets, inlining also avoids broken image links.
This converter makes encoding effortless. Drop an image into the tool and it reads the real format from the file’s byte signature, then produces a Base64 string or a full data URI you can copy or download as a text file. You can choose a raw Base64 output with no prefix or a properly tagged data URI, and fold long strings at 64 or 76 characters for readability. The detected format and file size are shown alongside the result. Everything runs in your browser with JavaScript, so your image is never uploaded — it is read and encoded locally, with no server involved. You can also load a sample and watch the encoded string appear instantly.
Whether you call it an image encoder, a Base64 string generator, or a data URI maker, the purpose is the same: turn a picture into portable text. This free online converter combines broad format support, copy and download options, and line-wrap controls in one clean interface. Upload an image, get its Base64 string, and paste it wherever your project needs it — all in your browser, with nothing uploaded and nothing to install. It is the simplest way to encode any image to Base64, ready whenever you need to embed, transfer, or store a picture as text. There is nothing to install and no account to create.
Encode Any Image
Turn PNG, JPEG, WebP, GIF, SVG, AVIF, HEIC, BMP or ICO into a Base64 string.
Data URI or Raw
Output a full data: URI or a bare Base64 string, whatever your code needs.
Format Detected
The tool reads the real format from file bytes and shows it with the file size.
Copy or Download
Copy the Base64 to your clipboard or save it as a plain .txt file.
Line Wrap Control
Fold long output at 64 or 76 characters, or keep it as one continuous line.
Fully Private
Your image is read and encoded in your browser — nothing is ever uploaded.
FAQ
Frequently Asked Questions
Image to Base64 encoding converts binary image data into a text string using 64 printable characters. It lets you embed pictures directly in HTML, CSS, JSON, or email without a separate file.
Open the tool, switch to Image to Base64, and drop in your picture. The tool reads its format and shows a Base64 string or data URI you can copy or download.
A data URI wraps a Base64 string with its MIME type, like data:image/png;base64,. Use it to embed images inline in HTML or CSS so they render with no extra request.
It encodes PNG, JPEG, GIF, WebP, AVIF, HEIC, SVG, BMP, and ICO, reading the real format from the byte signature. Unrecognized files still export as a generic binary string as well.
No. Encoding only translates the image bytes into text, so the picture stays identical to the source. Quality is unchanged because no recompression happens during the Base64 conversion step in any way.
Yes. Choose the Raw base64 option to skip the data: prefix, or pick a specific format. The output is a bare string you can paste wherever your code expects it.
No. Encoding runs entirely in your browser with JavaScript, so your image never leaves your device. Nothing is uploaded, stored remotely, or shared with anyone at any point in the process.
Base64 turns every three bytes into four characters, which adds about 33 percent overhead. It is ideal for small assets like icons, while large hero images are better kept as separate files.
Yes. Copy the data URI and paste it into an img src attribute or a CSS background-image url(). The browser renders it as a normal image with no separate file.
Yes. It is completely free with no watermarks, no sign-up, and no daily limits of any kind. Encode as many images as you like, at any time, in your browser.