Simple pricing
$2 first 5 pages, then 10¢/page after that, capped at $4.50.
Just the fax.
No signups.
No tricks.
Send your fax on this page in 3 easy steps
$2 first 5 pages + 10¢/page after; $4.50 max
No account needed
Secure & private
Temporary by design
Charges only on delivery
Delivery report
No account needed
Upload your file, add a number, and send.
Secure & private
Server working files are private, short-lived, and limited to the fax workflow.
Temporary by design
Server working files are short-lived, and local delivery reports stay in your browser for up to 24 hours.
Charges only on delivery
You only pay after the fax is delivered.
Delivery report
Proof of transmission & sent pages preview
Frequently Asked Questions
How is PromptFax different from other fax services?
Many online fax services use dark patterns and tricks to recoup their costs through automated monthly subscriptions.
PromptFax is designed for when you only want to send one fax. We make this as quick and easy as possible.
We don't do accounts, we don't do trials, and we don't do subscriptions. No surprise bills. No spam. No feature gating. No upsells. No dark patterns. No tricks. No games. No gimmicks. You only pay for what you fax, and that's it.
How much does PromptFax cost?
PromptFax costs $2.00 for the first 5 pages, then $0.10 per page after that, capped at $4.50.
4 pages costs $2.00, 6 pages costs $2.10, 10 pages costs $2.50, 25 pages costs $4.00, and 35 pages costs $4.50.
Do I need an account?
No. We don't do accounts. PromptFax is built for one-off faxing with no signup, no trial, and no account creation.
How do I pay?
When you are ready to send your fax, PromptFax opens Stripe's secure payment panel to enter your payment information.
Payment is processed by Stripe for Cogint Labs LLC, the operator of PromptFax. We accept all major credit and debit cards.
What files can I upload?
We currently accept PDF, JPG, JPEG, and PNG files.
What are the page limits?
Yes. We support up to 35 total pages and 50 MB total across attached files.
Where do I find more information?
The easiest way is to just ask in the prompt area above.
You can also see our more detailed FAQ page. Developers and LLM users can start with the MCP connector setup.