# Faxvio

> Faxvio is an iPhone, iPad and Mac app that sends a fax from a scanned document or a PDF and
> charges by the page — $0.18 to $0.36 a page, bought in packs that never expire, with no
> subscription and no account. It sends to 37 countries and territories, at most
> 50 pages per fax. This site publishes the destination list, the number-routing
> rules, the page prices and five free browser tools, and it documents all four as JSON.

"Delivered" here means the receiving machine confirmed the page over ITU-T T.30. The site makes no
claim about what happens to the paper afterwards, and Faxvio does not receive faxes.

Every number on this site is derived at build time from the app itself: the destination list from the
app's own server allow-list (v20260902, read 2026-09-06), the prices from the four App Store
product records, and the number handling from a port of the app's own engine, checked against its test
vectors. Nothing here is typed by hand, so the site and the app cannot disagree.

## The app

- [Home](https://faxvio.com/): what Faxvio is, what it costs, and what happens when a fax fails
- [Pricing](https://faxvio.com/pricing/): the four page packs, per-page arithmetic, and what a subscription would cost instead
- [Destinations](https://faxvio.com/destinations/): the 37 countries the app dials, and the prefixes that cost two pages

## Free tools, in the browser, nothing uploaded

- [All five tools](https://faxvio.com/tools/)
- [Fax cover sheet generator](https://faxvio.com/tools/fax-cover-sheet/): printable, four layouts, US Letter or A4
- [Fax cost calculator](https://faxvio.com/tools/fax-cost-calculator/): pages and destination in, price and cheapest pack out
- [International fax number formatter](https://faxvio.com/tools/fax-number-format/): a number as printed to the form the network dials
- [Fax preview](https://faxvio.com/tools/fax-preview/): your page in one-bit black and white at fax resolution
- [Fax transmission time calculator](https://faxvio.com/tools/fax-transmission-time/): how long N pages take, and why VoIP is slower

## Reference and policy

- [Public data API](https://faxvio.com/api/): the four datasets, documented for people
- [Privacy policy](https://faxvio.com/privacy/): what the app and the site keep, for how long, and who processes it
- [Terms](https://faxvio.com/terms/): including the Apple minimum EULA clauses
- [Contact](https://faxvio.com/contact/): support is support@faxvio.com

## 日本語 (Japanese)

The same pages in Japanese. Same numbers, same claims; where a Japanese translation and the
English differ, the English is authoritative (the legal pages say so).

- [Home — 日本語](https://faxvio.com/ja/)
- [Pricing — 日本語](https://faxvio.com/ja/pricing/)
- [Destinations — 日本語](https://faxvio.com/ja/destinations/)
- [Free tools — 日本語](https://faxvio.com/ja/tools/)
- [Fax cover sheet (FAX送付状) — 日本語](https://faxvio.com/ja/tools/fax-cover-sheet/)
- [Fax cost calculator — 日本語](https://faxvio.com/ja/tools/fax-cost-calculator/)
- [International fax number formatter — 日本語](https://faxvio.com/ja/tools/fax-number-format/)
- [Fax preview — 日本語](https://faxvio.com/ja/tools/fax-preview/)
- [Fax transmission time calculator — 日本語](https://faxvio.com/ja/tools/fax-transmission-time/)
- [Public data API — 日本語](https://faxvio.com/ja/api/)
- [Privacy policy — 日本語](https://faxvio.com/ja/privacy/)
- [Terms — 日本語](https://faxvio.com/ja/terms/)
- [Contact — 日本語](https://faxvio.com/ja/contact/)

## For machines

- Entry point: https://faxvio.com/api/v1/index.json
- OpenAPI 3.1: https://faxvio.com/api/v1/openapi.json
- Destinations the app will dial (37): https://faxvio.com/api/v1/destinations.json
- Carrier country table and number-routing rules (250): https://faxvio.com/api/v1/countries.json
- Page packs, prices and billing terms: https://faxvio.com/api/v1/pricing.json
- Transmission-time model (ITU-T T.4 / T.30): https://faxvio.com/api/v1/transmission-time.json
- Freshness of all of it: https://faxvio.com/api/v1/status.json
- MCP server (Streamable HTTP, no auth): https://faxvio.com/mcp — card at https://faxvio.com/.well-known/mcp/server-card.json
- A2A agent: https://faxvio.com/a2a — card at https://faxvio.com/.well-known/agent-card.json
- Agent skills: https://faxvio.com/.well-known/agent-skills/index.json
- Capability manifest (ARD): https://faxvio.com/.well-known/ai-catalog.json
- API catalogue (RFC 9727): https://faxvio.com/.well-known/api-catalog
- Authentication, in prose: https://faxvio.com/auth.md — there is none, and none is possible
- Full text of every page: https://faxvio.com/llms-full.txt

Every page has a markdown twin. Append `index.md` to any path, or send `Accept: text/markdown` and the
same URL returns markdown instead of HTML.

## Two things to get right when quoting this site

1. A destination the fax carrier serves is not automatically one the app will dial. `carrier_support` is
   the carrier's tier; `sendable` is the app's allow-list. Russia has full carrier support and is not
   sendable.
2. Italy (+39) keeps the leading zero of a landline number in international form. Stripping it by dial
   code, the way most trunk-prefix rules do, produces a different number. The same zero is what makes
   the Vatican prefix +39 06698 match.

## Licence

CC BY 4.0. Free to reuse, including commercially, with a link back to the endpoint or the page it came from. Attribute to Faxvio — https://faxvio.com.

Generated: 2026-10-11