Data URL to File Downloader - Online Decode & Save

A Data URL (also called Data URI) is a string that encodes file data directly into a URL using the data: scheme. It includes the MIME type, optional base64 encoding flag, and the actual file content. Common format: data:[MIME-type][;base64],<data>. Data URLs are widely used for embedding images, fonts, and other small assets directly in HTML/CSS to reduce HTTP requests.

Our tool parses the Data URL string to extract the MIME type and encoded data. If the data is base64-encoded, it decodes it into binary; if it's URL-encoded plain text, it decodes using decodeURIComponent(). Then it creates a Blob object in your browser and generates a downloadable file — all processing happens locally on your device, no data is ever uploaded to any server.

Absolutely safe. All processing is done entirely client-side in your browser using JavaScript APIs (atob(), Blob, FileReader). Your data never leaves your device. We don't use any server-side processing, no cookies track your Data URLs, and no information is stored or transmitted. You can even disconnect from the internet and the tool will still work perfectly.

Our tool supports all MIME types that can be represented in a Data URL, including: Images (PNG, JPEG, GIF, WebP, SVG, BMP, ICO), Documents (PDF, DOCX, XLSX), Text (plain text, HTML, CSS, JavaScript, JSON, XML), Audio (MP3, WAV, OGG), Video (MP4, WebM), Fonts (WOFF2, TTF), and more. For images, text, audio, and video, you get an instant live preview before downloading.

Common use cases: (1) You found an image embedded as a Data URL in a webpage's source code and want to save it as a proper image file. (2) You received a Data URL via email or messaging and need the actual file. (3) You're a developer debugging base64-encoded assets. (4) You need to extract embedded resources from HTML/CSS for optimization. (5) You want to convert a large inline asset back to a separate file for better caching and performance.

Switch to the "File → Data URL" tab, then drag & drop a file or click to browse. The tool uses the FileReader.readAsDataURL() API to encode your file into a Data URL instantly. You can then copy the generated Data URL to your clipboard. Note: Data URLs are roughly 33% larger than the original binary file due to base64 encoding overhead, so this method is best for files under ~10 MB.

Size overhead: Base64 encoding increases file size by ~33%. Browser limits: Some browsers impose limits on Data URL length (e.g., ~2 MB for data attributes in older browsers, though modern browsers handle much larger). Caching: Unlike separate files, Data URLs can't be cached independently by the browser. Readability: Large Data URLs make source code hard to read. No incremental loading: The entire resource must be loaded before rendering. For production websites, external files are generally preferred over large Data URLs.

Currently, our tool processes one Data URL at a time for clarity and reliability. If you have multiple Data URLs, simply process them one after another — the tool resets quickly and maintains fast performance. For bulk extraction of Data URLs from HTML pages, consider using browser DevTools or a specialized scraper. We may add batch processing in a future update based on user feedback.