How it works

Done In 3 Simple Steps.

1

Choose the source

Upload a supported video no larger than 100 MB.

2

Set CRF

Choose a quality tradeoff between 18 and 40.

3

Compress and compare

Review the size comparison and playback before saving the MP4.

Supported formats and capabilities

Know Your Output Options.

H.264 MP4

AAC audio at 128 kbps

CRF 18–40

FAQ

Frequently Asked Questions

Still have questions? View the full FAQ or Contact.

Try Another Tool.

Continue with a related tool. Review its supported inputs, availability and usage requirements before processing.

Video Converter

Convert an uploaded video to MP4, WebM, MOV, AVI or MKV using the available server encoder.

Video to MP3

Extract an uploaded video’s audio as MP3 at 128, 192 or 320 kbps.

GIF Maker

Create a looping GIF from the first ten seconds of an uploaded video with a frame-rate control.

MP4 to GIF

Convert the first ten seconds of an uploaded MP4 to a looping GIF with a frame-rate control.

01

Introduction

Video attachments and recordings can be larger than a sharing workflow permits. Video Compressor exposes a quality-based compression setting so you can evaluate a smaller derivative. It does not promise a target byte size or lossless reduction.

02

What This Tool Does

FFmpeg encodes video with libx264 and the selected CRF, using the fast preset. Audio is encoded as AAC at 128 kbps and the result is MP4. A higher CRF generally sacrifices more visual detail; an already efficient source may not become smaller.

Key features

Video Compressor Features

Choose compression with the CRF slider. Lower CRF favors quality and larger files; higher CRF favors smaller files at lower quality.

CRF Slider

Control the implemented quality range of 18–40.

H.264 Encoding

Create an MP4 with the service’s libx264 settings.

AAC Audio

Encode sound at the configured 128 kbps.

Measured Size Change

See whether the actual derivative is smaller.

MP4 Delivery

Receive a file with a fixed output container.

Original Retained

The operation creates a new download without changing the local source.

Benefits

Why People Actually Use It.

Beyond the headline features, here is what the tool unlocks in real workflows.

Attachment Planning

Compare the result with a sharing service’s size budget.

Quality Decisions

Choose a less aggressive setting for motion and readable screen text.

Consistent Delivery

Receive one defined output format instead of an unexplained extension change.

Best practices

Use It The Right Way.

A few habits that consistently produce the best results.

1Keep the original before using a lossy derivative.
2Review motion, text and audio after compression.
3Compare actual size rather than expecting a fixed percentage reduction.
4Choose a shorter source if processing exceeds the server timeout.

Helpful Resources

Guides and Official References

Use the reference below for the formats, concepts or platform rules relevant to Video Compressor. The capabilities described on this page are limited to the controls SavDown actually provides.

SavDown Service Information

SavDown Privacy Policy
Review account data, site analytics and service privacy information.
SavDown Plans and Credits
Review current account allowances and credit options.

Official Documentation

FFmpeg conversion documentation
Official reference for media conversion concepts, stream selection and encoding options.

External documentation describes its own platform or standard and does not imply that SavDown implements every feature it documents. See the SavDown privacy policy and pricing page for account and service details.

Supported inputs

Supported Inputs and Compatibility

One uploaded video, up to 100 MB. Accepted containers still need readable codecs. Processing depends on the deployed FFmpeg binary, server timeout and source complexity; there is no guaranteed duration or completion speed.

MP4WebMMOVAVIMKV

Common use cases

Built For Real Workflows.

Practical applications of the inputs, controls and outputs described above.

1

Screen Recordings

Prepare a review copy for an issue discussion.

2

Training Clips

Evaluate a lighter MP4 for internal distribution.

3

Upload Preparation

Try a smaller derivative before submitting to a size-limited service.

Tips & tricks

Power-User Tips.

Small habits that save time and produce better files.

Increase CRF gradually if the first result is too large.

Use a lower CRF if small screen text becomes unreadable.

There is no target-megabyte or resize control here.

Re-run from the original rather than compressing each successive result.

Why choose SavDown

Why This Tool?

The CRF control makes the compression tradeoff visible instead of hiding it behind a claimed percentage saving. The reported result size and fixed MP4 delivery give you something concrete to compare against the destination’s requirements.

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