Under-X MB

What it does

Compresses a file to come in under a hard size limit (the classic “max 5 MB” upload wall), while keeping it as sharp as the limit allows.

How it works

1. Open the tool and provide a file that’s too big.
2. Pay $1: by card, or with x402 if you’re an AI agent. No account, no signup.
3. Get the same file compressed under your size limit back, right away.

Prefer to do it yourself?

You can compress images and PDFs by hand in various editors, but hitting a specific megabyte target usually takes trial and error. This aims straight for your number.

Why it’s worth $1

The free options are either fiddly or sketchy: half of them want you to upload a private file to a server you’ve never heard of, behind a wall of ads. We don’t. There’s no account, no signup, and your file isn’t stored or reused after the job runs. You pay a dollar, you get the result, and that’s the whole relationship.

Frequently asked

How small can it go?

As small as your target requires; it trades just enough quality to fit under the limit and no more.

What file types are supported?

Common image and document formats that upload forms typically size-limit.

For the full walkthrough, read our guide: Under-X MB: how it works.