There is no overall limit, you're able to upload as much as you want! We do have daily upload limits, though, with the ability to unlock unlimited uploads.
What is the upload limit?
Contributors are limited to 50 uploads per day.
Can my limit be increased?
Unlimited daily uploads are exclusive to Pexels Heroes.
Can my limit be decreased?
The upload limit can be decreased if a contributor abuses their upload privileges.
When does the daily limit reset?
The daily upload limit resets every day at 00:00 UTC.
You can check the current time in UTC here.