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 long can a 50 MB video be at 720p?

At 720p with Medium compression (CRF 23), a 50 MB MP4 holds approximately 4–8 minutes of typical screen recording or presentation video. High-motion content fits less — around 2–4 minutes. Use High compression (CRF 28) for longer clips.

Does Slack compress the video again after upload?

Slack does not re-encode video — it stores and serves the file as-is. This means the quality you upload is the quality recipients will download.

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 50 MB

Under the Slack free-tier cap. Fits Discord standard, Asana, Notion, and most team tools.

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.

Slack's free tier caps file uploads at 50 MB. Discord's standard file upload limit is 25 MB (500 MB with Nitro). Check out your corporate intranet and project management software, such as Basecamp, Asana, and Monday.com. Typically, these set a 50–100 MB file size limit. Compressing your video to 50 MB covers all of these at once.

When you need 50 MB

Slack free-tier file shares (50 MB cap)
Slack’s free and Pro plans allow file uploads up to 50 MB. This includes video updates, screen recordings, and even demo clips that have been compressed to 50 MB or so and uploaded instantly.
Project management tool uploads
Asana, Monday.com, Basecamp, and Notion all enforce file size limits between 50–100 MB for attachments.
Short product demo recordings
3–8 min product walkthroughs and onboarding recordings also compress well to 50 MB at 720p.

Frequently asked questions

25 MB

Stay under Gmail's 25 MB cap. Send your video as a real attachment, not a Drive link.

100 MB

Hit Discord Nitro Basic and most LMS upload limits. Full 1080p quality at 100 MB.

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Compress Video to 50 MB

How it works

When you need 50 MB

Frequently asked questions

Other size targets

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