Video Compressor

Upload one video (video/*, up to 500 MB), pick a CRF-style preset (Fast 23, Balanced 28, Small 33, Tiny 38), choose encoder speed Fast/Medium/Slow (ultrafast/medium/slow), compress on the server, then download with MB sizes and approximate percent saved.

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Category: Audio & Video Tools

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Compression preset

Encoding speed (CPU time)

At "Balanced", most videos shrink 40–70% with minimal quality loss.

What does the Video Compressor do?

The Video Compressor re-encodes a single upload with constant-rate-factor style quality steps instead of asking you to type bitrates manually. Four selectable tiles translate to CRF values 23, 28, 33, and 38—lower numbers bias toward quality and larger outputs, higher numbers chase smaller files with more visible compromise. A separate Encoding speed row chooses how much CPU time the worker should spend: Fast sends an ultrafast-style preset for quicker turnaround, Medium is the default balanced pass, and Slow favors efficiency per bit at the cost of longer queues. Submitting uploads the clip and posts both the chosen CRF and encoder preset string to the media job API. When processing completes, the download card can show megabytes before and after plus a rounded percent-smaller line derived from returned byte sizes.

Expectations

The helper copy under the controls claims that at the Balanced preset many videos shrink about forty to seventy percent with minimal quality loss; treat that as guidance, not a promise—screen recordings, grainy drone footage, and already tiny web rips behave differently. This tool does not expose resolution pickers; it focuses on quality/size tradeoffs through CRF and encoder effort.

Privacy

Full video files are uploaded to Dynamic Duniya for transcoding. Use only footage you own or are permitted to process on a third-party service.

Frequently Asked Questions

What is CRF?

CRF (constant rate factor) is a quality-first knob used by common encoders: lower values mean higher quality and larger files, higher values mean smaller files with more compression artifacts. The UI labels each preset with its numeric CRF.

Will Slow speed make the file smaller?

Slower encoder presets mainly improve quality per megabyte and can yield modest size wins at the same CRF, but the biggest jumps still come from choosing a higher CRF preset.

Is the Video Compressor free?

Yes for typical personal and work use on Dynamic Duniya, within upload limits.

Tips

Quick guidance for using our tools safely and effectively.

Privacy

Files are processed on the server for conversion only and are not used for training or shared with third parties.

Best results

Use the formats suggested in each tool. Large media files may take longer — keep the tab open until processing finishes.

Need something else?

Browse related tools below or explore other categories from the main Dev Tools hub.