The 10-Conversions-Per-Hour Limit: Why It Exists and How to Plan

You have a list of eight clips to convert, you start working through them, and then at number eleven the site asks you to wait. That is the hourly limit in action. Ten conversions per hour per IP address sounds small until you plan around it, and then it turns out to be quite workable.

Why a limit exists

A shared service is a bit like a shared kitchen. If one person uses every burner for hours, nobody else can cook. A cap keeps resources fair, protects the servers from overload and discourages bulk use that does not fit the tool's purpose. It also keeps costs sustainable, since processing audio takes real computing power.

How the window works

The limit is a sliding window, not a clock reset on the hour. The service counts how many conversions your address made in the previous 60 minutes. If it is fewer than 10, you can go ahead. If it is 10, you wait until the oldest one is more than an hour old.

An example: you convert at 10:00, 10:05 and ten minutes apart afterwards until you have ten. At 10:55 you hit the limit. At 11:00 the first conversion drops out of the window, and you can run one more. At 11:05, another.

Your address is not stored in plain form. The counter uses a salted hash kept in memory, so it is not a record of who you are.

Who shares an address

The count belongs to the IP address, not to you personally. People on the same network may share it:

• Households with one router share it, though usually that is only a few users.
• Offices, schools and libraries may route many people through one address.
• Mobile carriers sometimes put thousands of phones behind a small pool.

If you hit the limit sooner than expected, the cause may be other people on your network. Switching from a shared Wi-Fi to your own connection may help, though using several addresses to bypass the limit goes against the spirit of the rule.

What happens at the limit

You see a message telling you the limit is reached and roughly how long to wait. Nothing is lost. The files you already converted remain available for one hour after creation, so download them. Then come back when the window opens.

Planning a batch

1. List your files first. Decide which ones you need today.
2. Prioritize. Convert the important ones in the first ten.
3. Combine where possible. If you control the source, merge short clips into one video under 15 minutes so one conversion does the work.
4. Spread out. Run a few now, a few after lunch.
5. Download immediately. Files are deleted after one hour.
6. Keep a log. Note what you converted, so you do not waste a slot on a duplicate.

Choose the right quality once

Re-running a conversion because you picked the wrong bitrate eats a slot. Decide beforehand: 128 kbps for speech, 192 kbps for general music and 320 kbps for editing or critical listening. Our bitrate guide in the blog can help you choose.

Stay within the other limits too

Videos can be up to 15 minutes. Over that, the request is rejected before it counts against the allowance, so check duration in the preview card first.

Is 10 enough?

For personal projects, backups and creators converting their own uploads, usually yes. Ten conversions at 15 minutes each is 150 minutes of audio per hour. If your work needs more, consider processing audio from original files on your own computer, which has no such limit.

Rights note

The limit is a technical measure and does not say anything about what is lawful. Convert only content whose rights you hold, or that is Creative Commons licensed or royalty-free and used within its terms. See the terms of use, then head to the converter.