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How to compress a video for WhatsApp on a Mac
By Himanshu Ranjan · Updated 8 November 2026
WhatsApp's help page says the default video limit is 100 MB at 720p on faster connections and 64 MB at 480p on slower ones. To prepare a video on your Mac, run FileDial's Compress › Compress to 720p or Compress › Compress under 50 MB. Both save a new copy and nothing is uploaded.
What WhatsApp actually allows
WhatsApp's own help page for sending media states that for videos the default size limit is 100 MB and 720p resolution on faster connections, and 64 MB and 480p resolution on slower ones. The same page says documents can be up to 2 GB. It also says you can send up to 100 photos or videos at once.
Those are the numbers WhatsApp publishes today, and they can change, so check the help page if your send keeps failing. The practical takeaway is that WhatsApp expects a video near 720p, so sending a 4K file from your Mac wastes time and storage on a picture the app will shrink anyway.
Prepare the video in FileDial
Resolution is the biggest lever. A 1080p or 4K recording carries far more pixels than WhatsApp displays. Dropping it to 720p before sending gives you control over the result instead of leaving it to the app.
- In Finder, select the video.
- Hold the right Option key to open the dial.
- Choose Compress › Compress to 720p. If the result is still over your limit, run Compress › Compress under 50 MB on the original instead.
- Check the result card for the size before and after, then drag the new file into WhatsApp Web or the desktop app.
Picking the right option
Compress to 720p is the simple choice for a clip of normal length. Compress under 50 MB targets a size and leaves a margin below the 64 MB slow-connection limit. Compress to 480p is for very long clips on the slow-connection setting. To quote a measured example, FileDial compressed a 366 MB 1080p video to 720p in 23 seconds, with 117 MB out. A longer clip may still need a smaller target.
If the video is long, trim it first with Cut › Trim… so you are not compressing minutes nobody needs to see. Compare also with Cut › Split in half if you would rather send two parts at full quality.
Alternatives on a Mac
QuickTime Player can export at 720p or 480p: open the movie, choose File > Export As and pick a resolution. Apple lists 720p and 480p as H.264 exports. You cannot set a target size, so you may need a second pass.
If quality matters more than size, WhatsApp's documents route accepts up to 2 GB per its help page, which sends the file as a document rather than a video. The recipient then downloads it like any file. Whether that suits your chat depends on the people you are sending to.
Sending from the desktop or from the phone
You can send a video from WhatsApp Web or the desktop app by attaching it, and from the phone after moving it over by AirDrop. Either way, the file you prepare on the Mac is the one that goes into the chat, so it is worth getting the size right once instead of letting the app decide.
If you prepare a batch for several chats, select all the clips in Finder and run the tool once. Every clip gets its own compressed copy beside it, so you can check each result and send the ones you like.
What to do when quality still matters
Some videos should not be squeezed: a wedding clip, a dance performance or a product demo you want people to see sharply. For these, think of the chat as a preview and send the full-quality file another way, such as a document attachment, which WhatsApp's help page says allows up to 2 GB, or a shared link. The compressed copy then works as a teaser in the chat.
If the clip contains a few good seconds in a long recording, trimming with Cut › Trim… gives you a short video that can stay at a higher quality inside the limit.
Common mistakes
The most common mistake is compressing a video that was already compressed by a messaging app and then compressing it again. Each pass loses detail, so always start from the original file on your Mac, not from a copy you received through chat. Another mistake is choosing 480p for every send. That setting matches the slower-connection limit, but on a normal connection WhatsApp's own page lists 720p, so 480p throws away detail you were allowed to keep.
A third mistake is judging the result on the Mac screen only. A clip that looks soft on a large display usually looks fine on a phone, which is where it will be watched, so preview on a phone if you can. When FileDial is not the right tool: if the clip is a long lecture or a feature-length recording, no compression will make it a pleasant chat video, and a shared link is the better choice.
Why do this on your Mac
Family videos and work clips are often personal. Compressing locally means the large original never passes through a third-party converter site. FileDial works offline, saves a separate copy, and keeps the original so you can try another setting if the first result looks too soft.
Questions
What is WhatsApp's video size limit?
Per WhatsApp's help page, the default video limit is 100 MB at 720p on faster connections and 64 MB at 480p on slower ones. Documents can be up to 2 GB. These figures can change, so verify on WhatsApp's help page. Because the limit is lower on slower connections, aim for the smaller figure if your recipient may have a weak signal.
Which FileDial tool should I use?
Start with Compress › Compress to 720p. If the file is still too big, use Compress › Compress under 50 MB on the original. Both save a new copy beside the original and show sizes before and after. Compress to 480p is a third option for very long clips, though the picture is noticeably smaller and softer.
Will WhatsApp still recompress my video?
Possibly. WhatsApp states default limits for resolution and size, and it may process videos to meet them. Preparing the file yourself at 720p means the picture you send is closer to the picture they receive, but the app has the final say. Treat your prepared file as the best input you can give the app, because WhatsApp stays in charge of what it finally sends.
Can I send a longer video without compressing?
You can try sending it as a document, which WhatsApp's help page says supports up to 2 GB. Alternatively split it with Cut › Split into parts under N MB… and send the parts. Check first that the recipient's phone can open a document of that kind, since a document arrives as a file to download.