Base64 to Image Converter
Convert Base64 strings or data URIs back to images instantly in your browser. Supports PNG, JPG, WebP, and GIF. Auto-detects format from magic bytes. No upload — files stay on your device.
Base64 or Data URI
Related Tools
Image → Base64
Convert images to Base64 data URIs instantly. Supports PNG, JPG, GIF, WebP, SVG. Files never leave your browser.
Image Compare
Compare two images with a draggable before/after slider in your browser. No upload required.
Image Cropper
Crop any image in your browser by selecting a region with your mouse. Download as PNG — no upload required.
Base64 encoding converts binary image data into a text string that can be embedded directly in HTML, CSS, JSON, or any text-based format. This is the reverse operation: given a Base64 string or a complete data URI (data:image/png;base64,...), the original binary image is reconstructed and rendered. The conversion is lossless — the decoded image is pixel-for-pixel identical to the original before encoding.
The need to decode Base64 back to an image arises when working with data URIs embedded in HTML or CSS source files, debugging API responses that return image data as Base64 strings (Google Vision AI, AWS Rekognition, OpenAI Vision, Twilio Media), extracting inline images from email HTML, or verifying that a Base64-encoded image was encoded correctly by checking whether it renders as expected.
This tool accepts both raw Base64 strings and full data URIs. For raw strings, it checks the magic bytes (the first few Base64 characters that encode the image format header) to auto-detect PNG, JPEG, GIF, or WebP — you can also manually select the format if auto-detection does not apply. The image is rendered entirely in the browser using a standard img element; no data is transmitted to any server.
Common Use Cases
Verifying Base64-encoded images in API responses
APIs like Google Vision AI, AWS Rekognition, and OpenAI Vision return or accept images as Base64 strings in JSON payloads. When debugging an integration, pasting the Base64 value from the API response into this tool immediately shows whether the image was correctly received, encoded, or cropped — faster than writing a script to decode and save the file.
Extracting embedded images from HTML and CSS
Web pages sometimes embed small images as data URIs in HTML img elements or CSS background-image properties. Copying the data URI value and pasting it here renders the image immediately and allows downloading it as a file. This is useful for archiving assets from pages that do not host them as separate files or for extracting icons from CSS sprite sheets embedded as data URIs.
Debugging image attachments in email HTML
HTML emails from transactional email services sometimes embed images as Base64 data URIs to avoid external image blocking by email clients. When an image does not render correctly in an email preview, extracting the data URI and decoding it here shows whether the image data itself is valid or whether the issue lies in the email client's rendering.
Inspecting images stored in databases or configuration
Some legacy systems store images directly in databases as Base64-encoded strings (in MySQL TEXT or BLOB columns exported as Base64) or in JSON configuration files. Pasting the stored value here immediately shows what the image looks like without needing to write a script to decode and save it to disk first.
How to Use
- Paste a Base64 string or a full data URI (
data:image/png;base64,...) into the input. - If pasting a raw Base64 string, select the image format (PNG, JPG, WebP, or GIF).
- The image preview appears instantly — no data leaves your browser.
- Click Download to save the image file, or Copy Data URI to copy the full URI.
Format auto-detection
If the input starts with data:, the format is read from the MIME type in the URI. For raw Base64, the tool checks the magic bytes (PNG, JPG, GIF, WebP headers) and selects the format automatically when possible.