ReelWorkshop exports as MP4/H.264, in vertical 9:16 at either 1080x1920 or 720x1280. Between two exports of the same compilation, the biggest driver of file size difference is which of those resolutions you chose, followed by the total duration of the export.
Most likely cause: exporting at the higher resolution by default
1080x1920 carries meaningfully more data than 720x1280 for the same content and duration. If you're posting somewhere that re-compresses on upload anyway, or you're bumping up against a storage or file-size limit, the higher resolution may not be buying you visible quality on the platform you're using.
Second cause: a longer compilation than necessary
File size scales with duration. A 90-second export is going to be meaningfully larger than a 60-second one at the same resolution, so if you're not tied to the longer duration, shortening the compilation is one of the most direct ways to bring the file down.
How to fix it
- Re-export at 720x1280 if 1080x1920 isn't necessary
Check what your target platform actually displays and re-compresses to before assuming you need the higher resolution.
- Shorten the compilation before exporting
Cut to a tighter edit or a shorter target duration rather than exporting the longest version and hoping compression handles it.
- Check whether audio is adding overhead you don't need
If you plan to mute the video anyway on the platform side, exporting muted from ReelWorkshop avoids carrying audio data you won't use.
- Re-check the current storage and file size guidance in the app
Plan-level storage limits and any file size guidance can change, so confirm current numbers rather than relying on old assumptions.
Exporting at the highest available resolution isn't automatically the right choice if the platform you're posting to compresses everything on upload anyway. Match your export settings to where the video is actually going.
Resolution and size at a glance
| Resolution | Typical use case |
|---|---|
| 1080x1920 | Best quality for platforms that preserve resolution, or for archiving your best exports |
| 720x1280 | Smaller file size, useful when storage or upload limits matter more than maximum resolution |
Preventing it next time
- Decide on a resolution based on your destination platform before exporting, not after you see the file size.
- Keep compilations at the shortest duration that still tells the story you want.
- Check your account's current storage allowance in the app periodically if you're exporting frequently, so file size doesn't creep up on you.
When file size isn't really about export settings
If the export itself is taking unusually long or appears to hang rather than simply producing a large file, that's a render stall rather than a size issue — see the render stalls page.
Which resolution options does ReelWorkshop export at?
Vertical 9:16 MP4 at either 1080x1920 or 720x1280.
Does muting audio reduce file size?
Yes, exporting muted removes the audio track's data from the file, which can help slightly, though resolution and duration are the bigger factors.
Is there a way to compress after exporting instead of before?
ReelWorkshop's own export settings are the place to control size before rendering; the how-to guide on compressing a compilation's file size covers additional options after export.