Yes, we automatically delete files after 24 hours and use encrypted file transfers.

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MP4 to SPH Converter

Q: Will my formatting be preserved?

Yes, the layout, fonts, and images are preserved as much as possible in the converted DOCX.

Convert your mp4 files to sph (nist sphere audio file) online & free

Drag & Drop or Choose a file

Chose MP4 file

To
Drop file here. 150 MB maximum file size.

No sign-up required. Your files are deleted automatically after 24 hours.

Convert to SPH

What did you think of your recent MP4 conversion? 5 (21842 Votes)

Convert Other MP4 File

How to Convert PDF to DOCX

Click the "Choose MP4 File" button and select your MP4.
Click “Convert to SPH”.
Wait a few seconds while we convert your file.
Download the resulting SPH file instantly.

What is MP4?

An MP4 file is a commonly used multimedia file used to store a film or video clip. Subs-titles or images may also be included. MPEG-4 Part 14 is a container format based on the QuickTime File Format (QTFF) used by .MOV and .QT files.

Read everything about MP4 file type.

What is SPH?

An SPH file is an audio file created in the NIST SPHERE format, which is often used in searching speech recognition. Usually contains the apos; recording of apos; a person who speaks. The SPH files can be provided as voice-recognition system entries.

Read everything about SPH file type.

More Free Online MP4 Tools

We have 100% free online MP4 tools that does not required any registrations and installations on your system, here are few popular free MP4 tools to View, Convert, Edit, Merge, Split, Compare and manage file metadata online from any device with a modern browser like Chrome, Opera and Firefox.

MP4 Converter

Open MP4

Edit MP4

Compare MP4 Files

Merge MP4 Files

Split MP4 Files

MP4 Metadata Viewer

Frequently Asked Questions

❓ How can I convert MP4 to SPH?

Chose or drag & drop your MP4 file, click Convert to SPH, and download the SPH file. No registration needed.

🔐 Are my files secure?

Yes, all uploads are encrypted. Your files are auto-deleted after 24 hours.

📝 Will my formatting be preserved?

Yes, our converter retains layout, fonts, and images as accurately as possible.

⏱️ How long does it take to convert MP4 to SPH?

Fileproinfo converter engine works fast. You can convert MP4 to SPH in a few seconds to couple of minutes for large size files with complex structure.

Convert from MP4

FileProInfo support manay file formats that allow you to convert MP4 to 100s of file formats, without any limit, registration and downloading, 100% free and online MP4 converter.

MP4 to MP3 MP4 to GIF MP4 to AVI MP4 to WMV MP4 to MPEG MP4 to WAV MP4 to WEBM MP4 to MPG MP4 to MOV MP4 to DIVX

Viw All MP4 Converter

Other recommended free online mp4 to sph file converter

All converters in this list are manually verified & 100% free and working properly, however you must use these apps according to their respective terms & conditions.

#	Tools	License	Developer
1	MP4 to SPH converter	Free	JeDok.com
1	MP4 to SPH converter	Free	Docpose.com

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This tool and page updated at: 12-Apr-2025

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