Can I compress multiple videos at once?

Yes. Compress one or ten files. However, with .mov files over 1.5 gigabytes, you may get an FS error, which means the browser is out of memory. For smaller files under 1 GB, you can follow the 1-to-5 file principle.

What video formats are supported?

It supports these formats: MP4, MOV, WebM, AVI, MKV, WMV, and TS. However, the output is always MP4 (H.264 or H.265). You can play an MP4 file on any device without additional software, and most video editing software supports it.

What does the compression level setting do?

The compression level parameter controls the Constant Rate Factor (CRF) of the H.264 video codec. CRF balances quality and size. For example, Small (CRF 18) is nearly lossless but reduces size only slightly, while Medium (CRF 23) is the H.264 default and a good trade-off between quality and size. High (CRF 28) is heavily compressed but much smaller than Medium quality. Maximum (CRF 35) is for archiving, and size matters more than quality.

What is H.265 and should I use it?

H.265 (or HEVC format) is the newer codec that compresses videos (at least with my testing MOV files) up to a whopping 116% difference with no noticeable difference in quality. If you’re using a video or sharing it with someone who uses a newer laptop or mobile device (like the newer iPhone or Android), you can use this format. Use the older H.264 format for devices released before 2016.

How does target size mode work?

Target size, as its name implies, aims to compress the video to a specific file size. It does this by calculating its duration, then determining the exact bitrate needed to reach the target file size. The video is encoded twice: first, an analysis pass, then an output pass. It's similar to how professional video software does it (using a 2-pass VBR encoding). When the file approaches its target size, it remuxes the container files instead of re-encoding.

Does compressing a video reduce its resolution or duration?

No, compression does not reduce your video's duration. It only reduces the quality of each frame. If you choose a resolution such as 720p, your video will be downscaled during compression. However, your video will still be the same duration.

Why does video compression take longer than image conversion?

Video compression takes longer because it needs to process multiple frames. For example, your 60-second video at 30fps has around 1,800 frames, whereas an image compressor only has one frame; thus, the compression is much faster.

How much 4K footage fits in 1 GB?

At 4K (3840×2160) with CRF 23, approximately 20–30 minutes of typical footage compresses to under 1 GB. Fast-moving content (sports, action) fits less — around 10–15 minutes. For longer 4K clips, use CRF 26–28 or split the footage into segments.

Should I use H.265 to fit 4K into 1 GB?

Yes — H.265 achieves the same visual quality at roughly half the file size. A 4K clip that takes 1 GB at H.264 CRF 23 takes approximately 500 MB at H.265 CRF 26. The trade-off is that H.265 playback requires a modern device (iPhone 6s+, recent Android, Windows 10 with HEVC codec).

Can I compress multiple videos at once?

Yes. Compress one or ten files. However, with .mov files over 1.5 gigabytes, you may get an FS error, which means the browser is out of memory. For smaller files under 1 GB, you can follow the 1-to-5 file principle.

What video formats are supported?

It supports these formats: MP4, MOV, WebM, AVI, MKV, WMV, and TS. However, the output is always MP4 (H.264 or H.265). You can play an MP4 file on any device without additional software, and most video editing software supports it.

Compress Video to 1 GB

Near-lossless compression for 4K recordings and long-form professional footage.

Preparing video compressor… (downloading ~25 MB, one-time)

Drop files or a folder here

or click to browse · paste from clipboard

Accepts .MP4, .MOV, .WEBM, .AVI, .MKV, .WMV, .TS · Up to 1,000 files

How it works

Drop your files
Click to browse, or drop your files. For best results, process 1-5 files at a time.
Choose settings
Adjust quality, format, and other options to match your needs.
Click Convert
Files are processed in the browser. Nothing uploads. No risk of data breach.
Download
Download files individually or grab all at once as a ZIP.

Content creators who want a near-lossless H.264 output for long 4K videos should choose the 1 GB option. At this size, multiple hours of 1080p or 30–60 minutes of 4K footage can be stored with no perceptible loss of quality compared to the uncompressed original. This threshold is what most broadcast media uses (H.264) to store high-quality video without compromising storage capacity. Note: the current version of the video compressor has a file size limit of 2 GB, and we are continually searching for ways to raise this limit.

When you need 1 GB

Long 4K recordings at near-lossless quality
A one-gigabyte compressed video file is equivalent to 30 to 60 minutes of 4K drone footage, webinar recording, and documentary videos.
Broadcast-ready H.264 deliverables
Broadcasters and streaming platforms often require H.264 MP4 deliverables that meet specific file-size thresholds. 1 GB covers most 30-minute programs.

Frequently asked questions

200 MB

Long 1080p clips that still transfer fast. Covers WeTransfer and most file-sharing tools.

500 MB

Archival compression for long recordings. Keeps 1080p quality across hour-long footage.

Compress Video Compress MP3 MP4 TO MP3

Compress Video to 1 GB

How it works

When you need 1 GB

Frequently asked questions

Other size targets

Related tools