Is online fax more secure than email?

For a one-off document, usually yes — not because fax uses stronger cryptography, but because it leaves fewer copies behind. An emailed attachment is stored indefinitely on multiple mail servers and every device that opens it, and it can be forwarded and searched forever. An online fax with short retention keeps the document only until delivery and deletes it within 24 hours. Neither is end-to-end encrypted all the way to the recipient, so for genuinely sensitive material, treat both as convenience channels, not vaults.

How long does PerPageFax keep uploaded files?

Files are stored temporarily while your fax is delivered, then automatically deleted within 24 hours of upload. The copy held by the fax transmission provider is deleted by an automated job at the 23-hour mark. No long-term copies of your documents are kept.

Can I send medical records with an online fax service?

Not with PerPageFax. The service is not HIPAA-compliant, and protected health information (PHI) must not be sent through it. If you need to transmit medical records or other regulated health data, use a fax service that explicitly offers a HIPAA-compliant tier with a business associate agreement.

Is online fax safer than a physical fax machine?

On the wire, both travel the same public phone network for the last mile, so neither is encrypted there. The differences are in copies and handling: a machine keeps your original on paper at your end and prints a copy at the recipient end, while an online fax leaves no printout on your side, keeps the file only briefly before deletion, and gives you a timestamped delivery confirmation instead of a thermal printout you can lose.

Is Online Fax Secure? vs. Email and Machines

Short answer: for everyday documents — contracts, tax forms, legal filings — yes, online fax is about as secure as the machine it replaces, and it beats email for the same job. But "secure" is not a yes-or-no property, and the honest answer depends on four specific things: how the document travels, where copies sit, how long they live, and who can reach them. This guide walks through each of those, compares online fax with email and physical fax machines, and states plainly what PerPageFax does and does not do.

What actually determines whether a fax is secure

Most "is online fax secure" advice stops at the word encrypted. That is not specific enough to act on. Four factors decide what happens to your document:

Transit. Is the connection encrypted while the file moves — from your browser to the service, and from the service to whatever transmits the fax? Any reputable service uses TLS here; you should verify rather than assume.
Storage. Where does the file sit between upload and delivery, and who controls that infrastructure?
Retention. How long do copies live after delivery — years in an archive, or hours? This is where services differ most, and where the fine print matters. A provider that keeps documents "for your convenience" is keeping them for everyone who might someday access that account.
Handling. Accounts, passwords, saved payment methods, inbox copies, printouts on a tray — every one of these is a place your document exists that you do not control.

Online fax vs. email vs. fax machine

Factor	Fax machine	Email	Online fax
How it travels	Public phone network, unencrypted	TLS between mail servers in most cases	TLS from your browser to the service; phone network for the last mile
Where copies live	Paper at both ends; scan memory on some machines	Every mail server and device it touches, indefinitely	Provider storage during delivery — retention policy decides the rest
Handling exposure	Printout sits on the recipient's tray	Forwardable, searchable, lives in an inbox behind a password	No printout at your end; what exists depends on accounts and retention
Proof of delivery	Machine transmission report (if you kept it)	None — "sent" is not "received"	Timestamped delivery status and confirmation

The pattern: email's weakness is not weak crypto — it is that copies multiply and never die. A fax machine's weakness is paper and the phone line. Online fax's weakness is that you are trusting a provider's transit, storage, and retention choices. So the real question becomes: what are those choices?

What PerPageFax specifically does

Stated plainly, with no marketing padding:

TLS on every leg we control. Your browser to our servers, our servers to storage, and our servers to the fax transmission provider all travel over HTTPS.
A short-lived hand-off. The transmission provider fetches your document through a signed link that expires within the hour — it does not get a permanent copy by default.
24-hour deletion. Files are stored temporarily while your fax is delivered, then automatically deleted within 24 hours of upload — regardless of whether delivery succeeded. The transmission provider's copy is deleted by an automated job at the 23-hour mark, because without that step the provider would otherwise retain fax files far longer. We never keep long-term copies of your documents.
No account, minimal data. There is no username, password, profile, or saved card to compromise. A fax record holds the recipient number, page count, file size, timestamps, and delivery status. An email address is stored only with a paid transaction — provided at checkout — and is used to send your delivery confirmation.
Card details never reach us. Payment happens on Stripe's hosted checkout page; we receive only a payment reference.

The honest limits

Any security page that lists only strengths is marketing. Here is what we cannot promise:

The last mile is the phone network. TLS protects your document from your browser to the fax carrier. From the carrier to the receiving fax machine, the transmission rides the public switched telephone network — unencrypted, exactly like every fax sent since the 1980s. This is not a PerPageFax shortcut; it is how fax works. If your requirement is end-to-end encryption, no fax service — online or otherwise — meets it. Use encrypted file transfer instead.
PerPageFax is not HIPAA-compliant. Do not send protected health information — medical records, patient data, anything PHI-regulated — through this or any non-HIPAA service. Use a provider that offers a signed business associate agreement.
The far end is paper. The receiving machine prints your document, and what happens to that printout is out of anyone's control but the recipient's. Fax to numbers you have verified, not numbers you guessed.

A practical checklist before faxing something sensitive

Verify the number. Pull it from the recipient's official site or a verified directory — a misdialed fax is a disclosure.
Send the minimum. Redact or omit pages and fields the recipient does not need.
Use a cover sheet. It identifies the intended recipient if the printout is misrouted at the far end. Build one free with the fax cover sheet builder.
Keep the proof. Save the delivery confirmation — the live status page URL and the confirmation email are your transmission record.
Match the channel to the data. Routine business and legal paperwork: fine. Medical records or anything regulated: use a compliant service.

Bottom line

Is online fax secure? For the documents people actually fax — IRS forms, court filings, contracts, insurance paperwork — a pay-per-page service with TLS in transit, a 24-hour deletion policy, and no accounts is a reasonable channel: fewer lingering copies than email, no paper on your end, and a timestamped record of delivery. What it is not is end-to-end encryption, and it is not a HIPAA channel. Know those two limits and fax with the same care you would mail.