MP4 to AVI Converter – Convert MP4 Videos to AVI Online (Fast & Free)

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Drag & drop MP4 files here or click to browse

Supported formats: MP4, MOV, AVI, MKV

MP4 to AVI Converter – Convert Video Files Online

The MP4 to AVI Converter is a web-based video conversion tool that allows users to upload video files and convert them into AVI format. The tool supports multiple video formats, handles multiple files in a single session, and provides downloadable AVI outputs with detailed conversion information.

This tool is designed to simplify video format conversion while managing files securely through session-based handling.

What Is This Tool?

This tool converts video files from supported input formats into AVI (Audio Video Interleave) format. Users can upload one or multiple video files, select a desired quality level, convert them on the server, and download the resulting AVI files individually or as a ZIP archive.

What Is MP4?

MP4 is a widely used digital video format that stores video and audio data in a compressed form. MP4 files are commonly used for video playback, sharing, and exporting media content from different applications.

This tool accepts MP4 files along with other supported video formats for conversion.

What Is AVI?

AVI (Audio Video Interleave) is a multimedia container format that stores audio and video data together. AVI files are commonly used in video processing workflows and are compatible with many media players and editing tools.

This tool converts uploaded videos into AVI format using video and audio codecs supported by the conversion engine.

Supported Input Formats

Based on server-side validation, the tool supports the following input video formats:

  • MP4

  • MOV

  • M4V

  • MKV

  • WebM

Files with unsupported extensions are rejected during upload.

Key Features

The following features are implemented directly in the tool:

  • Upload multiple video files in one session

  • Drag-and-drop and file selection upload methods

  • Session-based file handling

  • Video quality selection (High, Medium, Low)

  • Automatic conversion using FFmpeg

  • Displays converted file details (size, duration, resolution)

  • Download single AVI file or all files together

  • Delete individual files or clear entire session

  • Automatic cleanup of temporary and converted files

How It Works

The conversion process follows these steps:

  1. Upload video files using drag & drop or file selector

  2. Files are saved temporarily on the server with unique identifiers

  3. Select a video quality option

  4. Start conversion to AVI format

  5. Converted files appear in the results section

  6. Download converted AVI files individually or together

Each upload session is isolated using a unique session ID.

Conversion Settings Explained

Video Quality Options

The tool provides three quality levels:

  • High – Higher video and audio bitrate

  • Medium – Balanced quality and file size (default)

  • Low – Lower bitrate for smaller file size

Quality selection affects video and audio bitrate during conversion.

Output Details Shown After Conversion

For each successfully converted file, the tool displays:

  • Converted AVI filename

  • File size

  • Video duration (if detected)

  • Video resolution (if detected)

  • Video codec used

  • Audio codec used

  • Selected quality level

If duration or resolution cannot be detected, the value is shown as “Unknown”.

Download Options

The tool supports multiple download methods:

Single File Download

  • Each converted AVI file can be downloaded individually.

Download All

  • If one file is converted → single file download

  • If multiple files are converted → files are packaged into a ZIP archive and downloaded together

Original filenames are preserved when possible.

Session & File Management

The tool uses session-based file management:

  • Each session has a unique session ID

  • Uploading new files clears previous session files

  • Users can remove individual uploaded or converted files

  • “Clear All” removes all files associated with the session

This prevents file conflicts between different users or sessions.

Automatic Cleanup Policy

To manage storage efficiently, the tool automatically deletes:

  • Temporary uploaded files

  • Converted AVI files

Files older than 1 hour are removed automatically by a background cleanup process.

Error Handling

The tool handles and reports various error conditions, including:

  • Invalid file type uploads

  • Missing files during conversion

  • FFmpeg not available on the server

  • Conversion timeout after 10 minutes

  • Conversion failures with detailed error messages

Errors are displayed clearly in the user interface.

MP4 to AVI Converter FAQs

Common questions about converting MP4 video to AVI.

When a new upload starts within the same session, the tool automatically removes all previous session files before saving the new ones. This prevents old files from being accidentally converted or downloaded.

Duration and resolution are detected using a video inspection process.
If this detection fails or the information is unavailable in the video metadata, the tool displays “Unknown” instead of incorrect values.

Yes. Each uploaded file includes a remove option, which deletes:

  • the temporary uploaded file

  • the converted AVI file (if created)

  • all internal tracking related to that file

Other files in the session remain unaffected.

Yes — it works on Android, iPhone, tablets, Windows, and Mac.

Each conversion has a maximum time limit of 10 minutes.
If the conversion exceeds this time, it is stopped automatically to prevent server overload.

“Clear All” removes:

  • all uploaded files

  • all converted AVI files

  • all session tracking data

A fresh session is then started automatically.

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