iPhone Video Guide

How to Reduce Video Size on iPhone

If your iPhone storage is full due to heavy 4K camera recordings, here is how you can quickly shrink them without losing video quality.

Quick Answer

To reduce video size on your iPhone, the easiest and safest method is using a secure, on-device compressor app like Compress. Because iPhones capture videos in high-quality 4K or 1080p, files can quickly reach hundreds of megabytes. With Compress, you can select these heavy videos and shrink them directly on your device. Another option is going to Settings > Camera > Formats and choosing 'High Efficiency' to capture smaller HEVC files, or using Apple's iMovie app. However, for existing videos, an on-device compressor is the quickest way.

Simple Process

3 Steps to Shrink iPhone Videos

Reclaim your gigabytes of storage space in less than a minute.

Choose Videos

Open the Compress app and pick the large video files from your library. You can select one file or process a bunch in batch mode.

Adjust Settings

Select one of the quick presets (like the 80% quality sweet spot) or manually adjust resolution and bitrate to hit your target size.

Save the File

Tap the compress button. The app encodes the file locally. Save the new, smaller video or replace the original file.

App Preview

Visual Guide

Pick videos directly from your library

Adjust quality presets easily

Compare sizes and save space

Specifications

Supported Formats & Codecs

Media Type	Supported Formats	Codecs Supported
Videos	MP4, MOV, M4V	H.264 (AVC), H.265 (HEVC)
Images	HEIC, JPEG, JPG, PNG, WebP	Optimized raster formats

Your Files Stay on Your Device

We care about your privacy. Unlike other video compressors, Compress does not upload your files to external servers. The entire compression is done offline, locally inside your iPhone's secure sandbox.

FAQ

Common Questions

Does reducing video size on my iPhone lower the video quality?

Not necessarily. When using the Compress app, the video is optimized by removing redundant pixel data that the human eye cannot detect. This lets you shrink the file size by up to 90% while the visual quality remains virtually identical to the original clip.

Will compressing a video delete my original recording?

No, the app gives you full control. After the compression process is complete, you can review the new file size and choose to either save it as a new copy in your camera roll, or replace the original file to free up space instantly.

How can I change my iPhone settings to record smaller videos?

Go to Settings > Camera > Formats and select 'High Efficiency' (HEVC). This records video in the HEVC codec, which is roughly half the file size of the older 'Most Compatible' (H.264) standard. You can also lower your recording resolution, such as choosing 1080p at 30 fps instead of 4K.

Ready to compress your media?

Download Compress for free on iOS and Android. Reclaim storage space and speed up sharing with secure on-device optimization.

Download on theApp Store

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