Nerulio.
All toolsNo upload · processed on this device

Reduce video size

Control resolution, FPS, bitrate and target size. Inspect measured results.

Drop video files hereProcess many files at once
No upload · processed on this device

Reduce video size

Control resolution, FPS, bitrate and target size. Inspect measured results.

How it works

  1. Open the source file
  2. Choose the processing mode and settings
  3. Run, inspect the result and download

Supported formats

MP4 / WebM / MOV → MP4 / WebM — Input decoding and output encoding depend on browser support.

What this tool does

Control bitrate, dimensions and FPS; target-size estimates account for duration and audio.

Implementation and verified quality

advanced · WebCodecs bitrate and resolution control with measured size targets. Quality qualification is in progress. Pro/Flagship quality has not been established.

Before you export

Fast cut shrinks to inner keyframes. Precise mode re-encodes; codec availability varies. Temporary outputs use local browser storage when available. Compatibility recording retains its short-clip limits.

Frequently asked questions

What determines the supported size?

Actual device memory, storage and codec support. Tested examples are evidence, not a guarantee for every file. advanced

Are my files uploaded?

Nerulio processes selected files on your device and has no file-upload API. Optional engines and models are downloaded from third parties; those requests expose connection information such as your IP address.

Will my work be saved automatically?

No. Images and editing state stay in this tab; media output can use local temporary storage. Changing language preserves your work; reloading, closing the tab, or following a link to another page can clear it.