How to Use
- 1.
Choose Base64 to Image or Image to Base64 using the tabs at the top of the converter.
- 2.
To decode Base64, paste a raw Base64 string or complete data:image URL into the input box.
- 3.
Click Convert to Image, review the detected format, file size, width, and height, then download the image.
- 4.
To encode an image, open the Image to Base64 tab and choose an image file up to 15 MB.
- 5.
Select Complete Data URL for direct embedding or Raw Base64 for APIs and applications that store the MIME type separately.
- 6.
Copy the generated value to your clipboard or download it as a text file.
Features
Two-way Base64 image encoder and decoder
Raw Base64 and complete data URL support
PNG, JPG, GIF, WebP, SVG, BMP, and ICO compatibility
File signature and MIME type validation
Instant image preview, dimensions, format, and size details
Custom filename for decoded image downloads
Copy or download generated Base64 output
Private browser-based processing without server upload
Frequently Asked Questions
What is a Base64 image?+
A Base64 image is binary image data represented as text using a standard set of characters. It can be stored in text-based formats such as HTML, CSS, JSON, XML, and API requests.
Can I convert an image file to Base64 online?+
Yes. Open the Image to Base64 tab, upload an image up to 15 MB, and the tool will generate both a complete data URL and raw Base64 output.
Which image formats does the converter support?+
The converter supports PNG, JPG and JPEG, GIF, WebP, SVG, BMP, and ICO files for browser-based encoding and decoding.
What is the difference between raw Base64 and a data URL?+
Raw Base64 contains only encoded image characters. A data URL also includes the MIME type and the data:image/...;base64 prefix, making it suitable for direct use in many HTML and CSS fields.
Are my image and Base64 data uploaded to a server?+
No. Encoding, decoding, previewing, and file generation happen locally in your browser. WebToolsEdge does not receive the image or Base64 content for conversion.
Does converting an image to Base64 reduce its quality?+
No. Base64 changes how the original binary data is represented but does not resize or recompress the image, so the original image data and quality are preserved.
Why is Base64 larger than the original image file?+
Base64 represents binary bytes as text and normally increases the data size by roughly one third. It is convenient for embedding and data transfer, but large images are usually better served as normal image files.
Why is my Base64 string not converting to an image?+
The value may be incomplete, contain invalid characters, use a mismatched MIME type, or encode non-image data. Paste the full value, remove surrounding quotes, and confirm that the original content is a supported image format.
About this tool
Free Base64 Image Converter
The free WebToolsEdge Base64 Image Converter lets you encode and decode image data without installing software or sending files to a remote conversion service. Use the Base64 to Image tab to turn a raw Base64 string or a complete data:image URL into a visible image. The converter validates the encoded data, detects the real image format, shows the decoded file size and dimensions, and lets you download the result with a custom filename. Use the Image to Base64 tab when you need to embed an image in HTML, CSS, JSON, email templates, API payloads, source code, or technical documentation. Upload a PNG, JPG, GIF, WebP, SVG, BMP, or ICO file and choose between raw Base64 output and a complete data URL. The generated value can be copied instantly or downloaded as a text file for later use. A data URL includes the MIME type and Base64 prefix, so it can often be pasted directly into an HTML img src attribute or CSS property. Raw Base64 contains only the encoded characters and is useful when an application, database, or API supplies the MIME type separately. Base64 encoding does not compress an image and usually makes the text representation larger than the original binary file, so it is best suited to small assets, icons, placeholders, and data exchange rather than large website photographs. Both conversion directions run locally inside your browser. Your image and Base64 content are not uploaded to WebToolsEdge for processing. The original pixels are preserved during encoding and decoding because the tool changes the representation of the data rather than resizing or recompressing the image.
Starting with a PDF instead of an image? Convert its pages with the PDF to JPG Converter first, then return here to encode the JPG output as Base64. You can also browse all Image Tools for related browser-based conversion workflows.