email tool
A disposable inbox for quick signups and testing
A throwaway email address you can read immediately in the browser.
Open CompMailscompmails.base31.orgCompMails gives you a temporary inbox you can hand to a signup form instead of your real address. The mail arrives in the browser, and the address goes away afterwards.
It is meant for the small stuff: a one-off download, a trial that insists on an email, or a form you would rather not give your real inbox to.
What it does
No setup
The inbox is ready when the page loads — nothing to register and nothing to confirm.
Reads in the browser
Messages appear on the page, so there is no mail client to install.
Keeps your real inbox clean
Signups that would otherwise generate years of newsletters land somewhere disposable instead.
Good for testing
Handy for walking through your own signup or password-reset flow without burning a real address.
How to use CompMails
- Open the tool and copy the address it gives you.
- Paste that address into the signup or form you are working with.
- Come back to the page to read whatever arrives.
Questions about CompMails
Is a disposable inbox private?
Treat it as public. Anyone who knows the address can read the inbox, so never use one for banking, account recovery, or anything sensitive.
Should I use it for an account I care about?
No. Once you lose access to the inbox you also lose password resets, so use your own address for anything permanent.
What is it best for?
One-off downloads, trials, and testing your own signup flows.
More tools in the directory
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