What compression setting is actually used?

A CRF (constant quality) of 30 with libx264's fast preset — CRF targets a consistent visual quality rather than a fixed bitrate, so results vary a bit by content.

Will this reduce video quality?

Yes, some — any real compression involves a quality tradeoff. CRF 30 is a moderate setting that noticeably shrinks file size while staying watchable.

Is the audio compressed too?

Yes — the audio track is re-encoded to AAC at 96kbps at the same time, not left at its original bitrate.

Why does a longer video take more time?

Every frame is genuinely re-encoded, so processing time scales roughly with the video's length and resolution.

Compress Video

Upload an MP4 and get a smaller version in seconds — free, no account required.

Drop your file here, or click to browse

.mp4 · max 20 MB

FloxerFile shrinks MP4 videos by re-encoding them at a lower quality directly on our servers. Video compression is real work for a server to do — best suited to short clips rather than long recordings. No software to install, no data stored after conversion.

How it works

1
Upload your MP4 file
Drag and drop your .mp4 file into the converter, or click to browse. Short clips up to 20 MB work best.
2
Compress
Click Convert. The compression runs on our servers — expect it to take a bit longer than an audio conversion, since video is much more work to re-encode.
3
Download your compressed video
Download the smaller MP4 directly to your device. Your file is never stored — it is deleted immediately after conversion.

Features

Real H.264 re-encode
Compressed with libx264 at CRF 30 (fast preset) — a genuine quality-targeted re-encode, not a bitrate guess.
Audio compressed too
The audio track is re-encoded to AAC at 96kbps alongside the video, so the whole file shrinks, not just the picture.
Works best on short clips
Because it's a full re-encode, processing time scales with video length — short clips finish fastest.
Rejects unreadable MP4 files
Invalid or corrupted MP4 files are rejected with a clear error.

Supported formats

.mp4

MP4

The most common video container.

Output format: .mp4

Frequently asked questions

What compression setting is actually used?: A CRF (constant quality) of 30 with libx264's fast preset — CRF targets a consistent visual quality rather than a fixed bitrate, so results vary a bit by content.
Will this reduce video quality?: Yes, some — any real compression involves a quality tradeoff. CRF 30 is a moderate setting that noticeably shrinks file size while staying watchable.
Is the audio compressed too?: Yes — the audio track is re-encoded to AAC at 96kbps at the same time, not left at its original bitrate.
Why does a longer video take more time?: Every frame is genuinely re-encoded, so processing time scales roughly with the video's length and resolution.

Related tools

Crop Video

Crop an MP4 video to a specific width, height, and position.

Trim Video

Cut an MP4 video down to a specific start and end time.