Data URI to File Converter
Convert any data URI back into a downloadable file. Paste a data URI (data:image/png;base64,... or data:text/plain,...) and instantly extract the original file with automatic MIME type detection and filename extension. Supports 40+ file types including images, text, audio, video, fonts, and PDFs - all processing happens locally in your browser, no signup required.
Convert any data URI back into a downloadable file. Paste a data URI (data:image/png;base64,...) and instantly extract the file with automatic MIME type detection and filename extension.
Paste the full data URI including the "data:" prefix and comma separator
Paste a data URI to convert
A data URI looks like data:image/png;base64,iVBOR...
All conversion is performed locally in your browser. No data is uploaded to any server.
Why Use Our Data URI to File Converter?
Instant Data URI Parsing
Paste any data URI and instantly extract all metadata - MIME type, encoding (Base64 or raw), file extension, category, and file size. Supports text, images, audio, video, fonts, and application files with automatic type detection.
One-Click File Download
Download the decoded file with a single click. The tool automatically suggests the correct filename extension based on the MIME type, and lets you customize the filename before downloading. Supports files of any size that can be handled by your browser.
Content Preview for Text Files
Preview the content of text-based files (HTML, JSON, CSS, JavaScript, plain text) directly in the browser before downloading. See the decoded content to verify it converted correctly, with a scrollable preview panel for large files.
40+ MIME Types Supported
Our tool recognizes 40+ common MIME types including all major image formats (PNG, JPEG, GIF, WebP, SVG, AVIF), text formats, audio/video codecs, font formats, and application types like PDF and Office documents. Unknown types default to .bin.
Common Use Cases for Data URI to File Converter
Front-End Development & Debugging
Extract embedded images, fonts, or other assets from data URIs found in CSS files, HTML inline styles, or JavaScript bundles. Convert data URIs back to standalone files for inspection, optimization, or replacement with external resources.
Email Attachment Recovery
Extract file attachments from data URIs embedded in HTML emails. Many email clients embed images and documents as data URIs within the email body. Convert them back to downloadable files for saving or sharing.
Image Extraction from Web Pages
Save images that are embedded as data URIs in web pages. When you inspect a page and find images using the data: URI scheme, use this tool to download them as actual image files for offline use.
Database & Export Recovery
Recover files from database exports that store binary data as data URIs. Convert blob data from SQL dumps, MongoDB exports, or JSON backups back into their original file formats.
API Response Decoding
Decode data URIs returned by APIs that embed file content in responses. Some REST APIs return images or documents as data URIs in JSON payloads - convert these back to files for testing and verification.
Security Research & Analysis
Analyze data URIs found during security research. Extract and inspect the content of data URIs used in phishing emails, malicious documents, or XSS payloads to understand the embedded content without executing it.
Understanding Data URIs
What Is a Data URI?
A data URI (Uniform Resource Identifier) is a scheme that allows you to embed file content directly within a URL string, rather than linking to an external file. Defined in RFC 2397, a data URI follows the format data:[<mediatype>][;base64],<data>. The MIME type tells browsers what kind of content it is (e.g., image/png, text/html), and the optional ;base64 flag indicates that the data portion is Base64-encoded binary data. Data URIs are commonly used for embedding small images (sprites), fonts, and other assets directly into CSS, HTML, and JavaScript to reduce HTTP requests.
How Our Data URI to File Converter Works
- Paste the Data URI: Copy any data URI string and paste it into the input area. The tool accepts data URIs of any size, including those with Base64 or raw/URL-encoded data.
- Parse & Decode: The tool parses the data URI to extract the MIME type, detect the encoding scheme (Base64 or raw), and decode the data into its original binary form. The MIME type is mapped to the appropriate file extension using a database of 40+ common types.
- Download or Preview: Customize the filename, then click "Download" to save the decoded file. For text-based content, you can preview the decoded content directly in the browser before downloading. The tool also provides a "Copy Content" option to copy decoded text to your clipboard.
Data URI Components Explained
- Scheme (data:): The URI scheme prefix that identifies this as a data URI. Without this prefix, the browser will not recognize it as inline data.
- MIME Type: The media type of the embedded content (e.g., image/png, text/html, application/pdf). This tells the browser how to interpret the data. If omitted, it defaults to text/plain;charset=US-ASCII.
- Encoding Flag (;base64): Indicates that the data portion is Base64-encoded. Without this flag, the data is treated as URL-encoded text (percent-encoding), which is inefficient for binary data but works for simple text content.
- Data Payload: The actual file content, either as Base64-encoded binary or URL-encoded text. The data follows the comma separator and can be of any length, though most browsers limit data URIs to around 32KB for performance reasons.
Privacy, Security & Availability
Our Data URI to File Converter processes everything locally in your browser. The data URIs you paste are never sent to any server - all parsing, Base64 decoding, and file generation happens client-side using JavaScript. The tool is 100% free with no signup, no account, and no usage limits. We support 40+ MIME type to extension mappings and can handle data URIs of any size that your browser can process. Downloaded files are created as Blob URLs that are revoked immediately after download.
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Frequently Asked Questions About Data URI to File Converter
A data URI (data: URL scheme) is a way to embed file content directly into a URL string instead of linking to an external file. Defined in RFC 2397, it follows the format data:[<mediatype>][;base64],<data>. Data URIs are commonly used in HTML, CSS, and JavaScript to embed small images, fonts, and other assets to reduce HTTP requests.
Simply paste the data URI into the input area and click "Convert Data URI". The tool automatically parses the MIME type, decodes the data, and presents a download button. You can customize the filename before downloading. For text-based content, you can also preview the decoded content in the browser.
The tool recognizes 40+ common MIME types including all major image formats (PNG, JPEG, GIF, WebP, SVG, BMP, TIFF, AVIF, ICO), text formats (HTML, CSS, JavaScript, JSON, XML, CSV, plain text), audio formats (MP3, OGG, WAV, WebA), video formats (MP4, WebM, OGV), font formats (TTF, OTF, WOFF, WOFF2), and application types (PDF, ZIP, GZIP, RTF, Office documents).
The tool processes files entirely in your browser, so the limit depends on available memory. Most browsers handle data URIs up to 32KB efficiently. Larger files may work but can slow down your browser. For files over 10MB, consider using traditional file hosting instead of data URIs.
Base64 encoding converts binary data into ASCII text, making it safe to embed in URLs. Raw (URL-encoded) data uses percent-encoding (%20 for spaces, etc.) and is typically used for simple text content. Base64 is more efficient for binary files (images, PDFs), while raw encoding works for short text snippets.
Yes. CSS data URIs look like `url(data:image/png;base64,...)`. You need to copy just the data URI portion (the part between the parentheses, starting with "data:") and paste it into our tool. The tool will decode it and let you download the original image file.
Data URIs eliminate additional HTTP requests, which can improve page load performance for small assets. They are useful for very small images (icons under 1KB), inline fonts for custom typography, and self-contained HTML documents that need to work offline without external dependencies.
Yes! Our Data URI to File Converter is completely free with no signup, no account, and no usage limits. All conversion happens locally in your browser - your data is never sent to any server.