email tool
Free temp mail that opens the moment you need it
A disposable inbox in one click — free, no sign up, no password to invent.
Open CompMailscompmails.base31.orgA temp mail address is the address you hand out when you do not want to hand out yours. CompMails issues one the second the page opens, so there is no form to fill in, no confirmation mail to click, and nothing to remember afterwards.
It is built for the small jobs — a download gate, a trial that insists on an email, a one-off verification link — and for testing your own signup flow end to end without spending a real address on it.
What it does
Instant, and no sign up
The address exists before you finish reading the page, and it is kept in your own browser so a reload brings it back.
Live inbox
The page checks for new mail on its own and pauses while the tab is in the background, so a waiting code appears as soon as you look.
Search, unread filter, reader
Find a message by sender, subject or text, filter to unread only, then read it in a sandboxed frame with the raw headers a click away.
Attachments and exports
Download an attachment straight from the reader, or save the whole message as an .eml file to keep or forward.
How to use CompMails
- Open CompMails and copy the address it creates for you, or show it as a QR code and scan it with a phone.
- Paste the address into the form, trial or download gate you are working with and send the mail.
- Read it on the page — follow the link or download the attachment — then start a fresh inbox whenever you are done.
Questions about CompMails
Do I need to sign up for a temp mail address?
No. There is no account, no password and no confirmation step: the inbox is created for you and kept in this browser, and a fresh one is always one click away.
Can I keep an address for later?
Yes — choose your own name, domain and password, and the address can be reopened from the inboxes kept in your browser. Random addresses can be saved the same way.
What should I not use it for?
Anything you would be upset to lose. Disposable inboxes expire after a few days, so password resets and account recovery do not belong here — and anyone who knows the address can read it.
More tools in the directory
Every tool here is free and needs no account. See the full tools index, or how many people are using them.