# mFax

> mFax is a secure online fax service for sending and receiving faxes from a phone, computer, or email — no fax machine or landline required. It is HIPAA-compliant (BAA available for business customers), available as iOS and Android apps and a web app, and offers a developer fax API. mFax is operated by Octagon Lab.

Key facts:
- Send and receive faxes from iPhone, Android, Mac, Windows, or any browser; pay-as-you-go and subscription plans.
- Built for healthcare, legal, finance, and small business — including HIPAA-compliant faxing of PHI and IRS/government tax forms.
- Free tools (no account needed): document-to-PDF converter, fax cover sheet generator, PDF merge, and PDF optimizer.
- Apps: [App Store](https://apps.apple.com/us/app/fax-from-iphone-send-docs/id6535690934) · [Google Play](https://play.google.com/store/apps/details?id=com.octagonlab.faxme) · Web app: [app.mfax.to](https://app.mfax.to/landing) (opens the fax composer directly, no sign-up needed)

## Product

- [mFax home](https://mfax.to/): Overview of mFax mobile and online faxing — features, pricing, and supported platforms.
- [mFax for Business](https://mfax.to/business/): Team faxing with HIPAA compliance, BAA, audit trails, and usage-based pricing ($3/seat + $4 per 100 pages, −20% annual).
- [Fax API](https://mfax.to/api/): Programmatic fax sending and receiving with webhooks for developers; HIPAA-eligible.
- [Support](https://mfax.to/support/): Help center, contact options, and answers to common faxing questions.
- [Company](https://mfax.to/company/): About mFax and Octagon Lab.

## Free tools

- [Document converter](https://mfax.to/document-converter/): Convert Word, images, and other documents to fax-ready PDF in the browser.
- [Fax cover sheet generator](https://mfax.to/fax-cover-sheet/): Create and download a professional fax cover sheet for free.
- [Merge PDF](https://mfax.to/merge-pdf/): Combine multiple PDFs into one file before faxing.
- [Optimize PDF](https://mfax.to/optimize-pdf/): Compress and clean up PDFs for reliable fax transmission.

## Guides & blog

- [Blog](https://mfax.to/blog/): Hundreds of guides on online faxing, IRS/tax fax numbers, HIPAA compliance, fax cover sheets, and service comparisons.
- [How to send a fax](https://mfax.to/blog/how-to-send-a-fax/): Step-by-step guide to sending a fax by phone, computer, or email.
- [How to fax online](https://mfax.to/blog/how-to-fax-online/): Faxing without a fax machine or phone line.
- [How to fax from iPhone](https://mfax.to/blog/how-to-fax-from-iphone/): Send and receive faxes on iOS.
- [Best online fax services](https://mfax.to/blog/best-online-fax-services/): Comparison of the top internet fax providers.
- [Best HIPAA-compliant fax services](https://mfax.to/blog/best-hipaa-compliant-fax-services/): Secure faxing options for healthcare and PHI.
- [How to fax to the IRS](https://mfax.to/blog/how-to-fax-to-the-irs/): Faxing tax forms, plus a directory of IRS fax numbers.
- [What is a fax number](https://mfax.to/blog/what-is-a-fax-number/): Fax number basics, formats, and how to get one.
- [Fax API guide](https://mfax.to/blog/fax-api/): How developers integrate fax sending and receiving via API.

## Legal

- [Terms of Service](https://mfax.to/terms/): Terms governing use of mFax.
- [Privacy Policy](https://mfax.to/privacy/): How mFax handles data and PHI; no-AI-training commitment.
- [Refund Policy](https://mfax.to/refund-policy/): mFax refund terms.

## Optional

- [Sitemap](https://mfax.to/sitemap.xml): Full list of all mFax pages.
- [Blog RSS feed](https://mfax.to/feed.xml): Latest mFax articles.
- [mFax vs eFax](https://mfax.to/blog/mfax-vs-efax/): Feature and pricing comparison with eFax.
- [Cancel eFax](https://mfax.to/blog/cancel-efax/): How to cancel an eFax subscription.
- [HIPAA-compliant fax](https://mfax.to/blog/hipaa-compliant-fax/): What makes a fax service HIPAA-compliant.
- [Fax cover sheet templates](https://mfax.to/blog/fax-cover-sheet-templates/): Free printable cover sheet templates.