"File too large" is one of the most common video upload errors. Platforms set size limits for storage and processing reasons, and they're strict — a file 1 MB over the limit gets the same error as a file 10× over. The fix is almost always to compress the video to just below the stated limit before trying again.
First: Note the Exact Limit
Before compressing, find out what you're targeting. The upload error, the platform's help page or the form itself usually states the maximum. Common limits:
| Platform | Typical limit |
|---|---|
| WhatsApp (as video) | ~16 MB |
| Email attachment | ~25 MB |
| Up to 4 GB, but smaller uploads process faster | |
| 5 GB | |
| LMS (learning portals) | Often 100–500 MB, varies widely |
| Company intranet tools | Often 50–200 MB |
How to Compress to a Target Size
- Open Video Compressor.
- Upload the video.
- Choose a quality setting and resolution that should bring it under the limit.
- Check the output file size after downloading.
- If still over, recompress from the original at stronger settings.
The most effective reductions come from lowering resolution. Dropping from 1080p to 720p typically halves the file size with minimal visible difference on most screens.
Targeting a Specific File Size
| Current size | Target | Try first |
|---|---|---|
| ~100 MB | Under 25 MB email limit | Drop to 720p, medium bitrate |
| ~500 MB | Under 100 MB LMS limit | 720p or 1080p at low bitrate |
| ~2 GB | Under 500 MB | 720p or lower, check frame rate too |
For the underlying settings, see what is video bitrate and how does it affect quality and video resolution explained.
When a Link Is Better Than Compressing
If the platform allows it, sharing a download link is often better than very aggressive compression:
- Upload to Google Drive and share the link.
- Upload to YouTube (unlisted if private) and share the URL.
- Use WeTransfer for a temporary link.
This preserves quality entirely and often makes the sharing experience smoother for the recipient too.
Compressing for WhatsApp and Email Specifically
Specific guidance for the two most common tight-limit platforms:
After Compressing: Verify Before Submitting
Always play the compressed video before uploading it to a platform — watch a section with motion if there is any, to confirm the quality is acceptable. A video compressed too far shows blockiness during movement, which is a sign the bitrate was set too low for the content type. If it looks blocky, go back to the original and try again with a less aggressive compression setting or a slightly lower resolution. For understanding why blockiness happens specifically and how to avoid it, see why compressed videos look blocky.
Platform Limits That Change
File size and duration limits on platforms do change, and they sometimes differ between free and paid account tiers or between desktop and mobile uploads. If you compress to a limit and it's still rejected, recheck the platform's current help documentation — the limit may have changed, or a different limit (like duration) may be the actual cause.
