Priconvert

Compress video online, privately in your browser

Reduce MP4 and MOV file size locally in your browser — your video is not uploaded for compression.

Compress your video
Your video is processed locally in your browser. The conversion engine may load on first use, but your video file is not uploaded to Priconvert for compression.
Loading usage…Local processing

Drop your video here

Drag and drop on desktop, or tap below to choose a video from your phone or computer.

Supported: MP4, MOV

Processed locally — nothing uploaded.

This release supports one .mp4 or .mov file at a time, up to 100.00 MB. Batch video compression and support for larger or longer videos may be added later.

About this tool

What does this video compressor do?

Video compression re-encodes a video so it takes up less storage space and less bandwidth to send or stream, while keeping the video watchable at a similar resolution. Priconvert does this locally in your browser using a balanced H.264 preset — your original file is read, re-encoded on your device, and never uploaded to a server for the compression itself.

This is useful whenever a video file is larger than a platform, email provider, or messaging app allows, or when you simply want a smaller file to store or share without exporting from a full video editor.

Supported formats and compatibility

Priconvert accepts .mp4 and .mov source files. The output is always a standard .mp4 file using the H.264 video codec, which plays back in virtually every modern browser, phone, and operating system without extra codecs or plugins.

This release focuses on a single balanced quality preset and processes one video at a time, up to the size limit shown above. Support for adjustable presets and batch processing may be added in a future update.

How it works

How video compression works

A straightforward local workflow — no account, no upload queue, and no server-side file handling.

  1. 1

    Choose your video

    Select or drag in an .mp4 or .mov file up to 100.00 MB. The file stays on your device — nothing uploads yet.

  2. 2

    Compression runs locally

    Priconvert loads a local video engine in your browser and re-encodes your video with a balanced H.264 preset. Your file is not sent to Priconvert for compression.

  3. 3

    Review the result

    Compare the original and compressed file size, and preview the compressed video before downloading.

  4. 4

    Download your MP4

    Save the compressed MP4 to your device. Priconvert does not keep a copy of your video on a server.

Privacy

Your video stays on your device

This video compressor is designed for local processing. Priconvert does not upload your video to a backend for compression in the current version.

  • Your video is read and compressed using your browser's own processing power.
  • The one-time video engine download is public, non-personal code — not your video file.
  • Priconvert does not receive or store the contents of your video on a server.

FAQ

Video compression questions

Common questions about compressing MP4 and MOV videos with Priconvert.

Related tools

Related converters

Need to work with images too? These run on the same local, private converter.