What does Video Compressor do?
Tubelexity compresses video files directly in your browser with controls for quality, resolution, frame rate, audio and approximate target size. It is useful when a YouTube upload, review copy or message attachment is larger than needed. You receive a locally encoded MP4 or WebM file plus an honest before-and-after size comparison.
How to use Video Compressor
- 1Choose an MP4, MOV or WebM video.
- 2Pick a quality preset and output resolution, or enter an approximate target size.
- 3Review the estimated size and codec settings.
- 4Compress locally, preview the result and download it if the reduction is useful.
Supported inputs and outputs
Inputs
MP4, MOV, WebM
Outputs
MP4 (H.264/AAC), WebM (VP9/Opus)
Practical uses
- Reducing upload time
- Preparing review copies
- Fitting a video into a message attachment
- Lowering archive storage
Browser and media limitations
- Target-size estimates are approximate.
- Already-compressed sources may become larger.
- VP9 encoding can be slow and Safari support varies.
- Upscaling does not create new detail.
How local processing works
Processing runs locally in your browser with FFmpeg.wasm. The media engine is downloaded on first use, but your media is not sent to Tubelexity or a processing server.
Frequently asked questions
Can I compress a video online for free?
Yes. Tubelexity compresses a local video in your browser without a watermark or paid credits.
Is the target file size exact?
No. The tool calculates a bitrate after reserving audio and container overhead, but source complexity changes the final size.
Which output has the widest support?
MP4 with H.264 video and AAC audio is usually the most broadly playable option.
Does compression reduce quality?
Re-encoding can reduce quality. Higher quality and resolution settings preserve more detail but produce larger files.
What if the compressed file is larger?
Tubelexity warns you and keeps the original available when compression provides no useful reduction.