What video formats are supported?

The tool supports all major video formats that modern browsers can play, including MP4 (H.264/H.265), WebM (VP8/VP9), OGG (Theora), and MOV. Format support depends on your browser - Chrome and Firefox support the widest range of codecs. The format is automatically detected from the data URI prefix.

Is there a size limit for conversion?

For optimal browser performance, we recommend Base64 strings under 10MB (approximately 7.5MB of actual video data). Video files are typically large, so Base64 encoding increases size by 33%. For videos over 20MB, consider using traditional video hosting platforms like YouTube, Vimeo, or cloud storage instead.

Is the conversion secure and private?

Absolutely! All Base64 decoding and video rendering happens entirely in your browser using JavaScript. Your video content is never uploaded to our servers or transmitted anywhere. This is perfect for previewing sensitive or confidential video content without exposing it to third-party services.

Why won't my video play?

Common issues include: 1. Unsupported video codec for your browser, 2. Incomplete or corrupted Base64 string, 3. Wrong MIME type specified, 4. Browser doesn't support embedded video playback. Try using Chrome or Firefox for best compatibility. Make sure the Base64 string is complete and properly formatted.

Can I control video playback (play, pause, volume)?

Yes! The HTML5 video player includes full playback controls: play/pause, volume adjustment, fullscreen mode, progress bar seeking, and playback speed (in some browsers). You can also use keyboard shortcuts: Space (play/pause), Arrow keys (seek forward/backward), M (mute), F (fullscreen).

When should I use Base64 encoded video vs regular video files?

Use Base64 video for: short clips embedded in emails, small animations in web pages, preview thumbnails, offline applications, or when you need self-contained HTML documents. For longer videos or streaming, traditional video hosting is much more efficient as Base64 increases file size by 33% and requires full download before playback.

Supports MP4, WebM, OGG formats. Example: data:video/mp4;base64,AAAAIGZ0eXBpc29t...

Click "Run" to decode Base64 and generate video player

Free Online Base64 to Video Converter

What Is Base64 to Video Converter?

Base64 encoding is a common way to represent binary video data as ASCII text, often used in data URIs, email attachments, or JSON payloads. Our Base64 to Video tool provides a simple, browser-based solution to decode these strings and reconstruct the original video file. Instead of manually writing scripts or installing software, you can paste your Base64 string and instantly generate a playable video.

This free online converter streamlines your workflow, whether you're a developer debugging an API response, a content creator retrieving media from a text-based system, or simply handling encoded video data. The entire decoding process happens directly in your browser, ensuring your files remain private and secure. No uploads to external servers are required, making it a fast and trustworthy utility for decoding Base64 strings.

Key Features

Instant Decoding: Quickly converts any valid Base64 string back into a video file without unnecessary delays.
Built-in Video Player: Preview the decoded video directly in your browser before downloading.
Direct Download: Save the output video as a standard MP4 or WebM file to your device with a single click.
Handles Large Strings: Efficiently processes lengthy Base64 strings commonly associated with high-resolution video data.
100% Client-Side: All data processing occurs locally in your browser, ensuring your files and privacy are fully protected.
Completely Free: No hidden costs, subscriptions, or usage limits. Use it as often as you need.

How to Convert Base64 to Video?

Navigate to the Base64 to Video converter page on ToolFK.
Paste your complete Base64 string into the main input text area.
Click the "Decode to Video" button to start the conversion process.
Wait a few seconds for the tool to process the string and generate your video.
Use the built-in media player to preview the decoded video content.
Click the "Download" button to save the restored video file to your local computer.

Best Use Cases

Web Development: Extracting inline video data from HTML, CSS, or JavaScript data URIs for testing or asset recovery.
API Debugging: Interpreting Base64-encoded video responses from REST APIs or GraphQL endpoints during development.
Data Recovery: Retrieving video files from legacy databases or text-based export files where media is stored as Base64 strings.
Email Attachments: Decoding video files that are embedded as Base64 text within raw email source code or CSV exports.
Educational Projects: Learning and demonstrating how Base64 encoding and decoding works with real video file formats.

Related Tools

Frequently Asked Questions

What video formats does the Base64 to Video converter support?

The tool supports decoding Base64 strings representing common web video formats, primarily MP4 (H.264) and WebM (VP8/VP9). The output file format is automatically detected based on the encoded data's header information. If the Base64 string is valid and corresponds to a browser-playable format, the tool will successfully decode and play it.

Is it safe to upload my Base64 strings to this online tool?

Yes, safety is a core priority. Our Base64 to Video converter operates entirely within your web browser using JavaScript. No data, including your Base64 strings or generated videos, is ever uploaded to our or any third-party server. This client-side architecture ensures that your sensitive or private video data remains completely under your control.

What kind of Base64 string is required for the conversion to work?

The tool expects a pure Base64-encoded string representing a binary video file. You should copy the entire encoded string without any truncation. Often, Data URIs contain a prefix like data:video/mp4;base64,.... The tool is designed to handle standard Base64 strings and may automatically strip the Data URI prefix if present.

Is there a file size limit for the Base64 string I can paste?

While there is no explicit hard limit imposed by the tool, the processing capability depends on your web browser's memory allocation and your computer's available RAM. Very large video files encoded as Base64 (e.g., hundreds of megabytes of text) may cause performance slowdowns. For extremely large files, we recommend using a dedicated desktop application.

Why is my Base64 string not converting, or the video is not playing?

Several factors can cause conversion to fail. First, ensure the entire Base64 string has been copied correctly without missing characters or line breaks. Second, verify that the original data actually represents a video file and not another media type like an image or document. Finally, check that your browser supports the underlying video codec (e.g., H.264 for MP4).

Can I convert a Base64 string back to its original high-resolution video?

Yes, the decoding process is lossless regarding the conversion from Base64 text back to binary data. The resulting video file will be identical to the original binary file that was initially encoded. The tool faithfully reconstructs the exact bitstream, preserving the original video's resolution, quality, and metadata.

Last updated: July 1, 2026