You can send a fax from a browser with the document, the recipient’s fax number, and an email address for delivery updates. You do not need your own fax number unless you expect a faxed reply.
If you’re deciding between providers first, compare Best Online Fax Services for One-Time Use, Complete Guide to Sending Fax Online, and Fax Without Subscription. If you are ready to send, use Onetime Fax or review Pricing.
Online faxing (also called internet faxing or digital faxing) lets you send and receive faxes using your computer, smartphone, or tablet instead of a traditional fax machine. The service prepares your digital document and transmits it to the recipient’s fax machine or online fax service.
Online fax services offer some real advantages over traditional fax machines:
For occasional sending, a pay-per-use service avoids buying a fax machine or maintaining a dedicated phone line. Compare the full price before sending, especially for long documents.
Use a browser on your computer or phone and upload digital files without printing them first. Fax transmission and delivery still take time, especially for longer documents.
A digital workflow avoids leaving paper at a shared fax machine. Verify the recipient number and keep the delivery confirmation for your records. Security and compliance depend on the service and your workflow.
Learn more about why fax technology remains essential in our digital world with our guide: Why Faxes Are Still Essential.
The first step to send a fax online is selecting the right service. Here’s what to consider:
For Occasional Users: Onetime Fax costs $5 for up to 100 pages, then $0.05 per additional page, with no subscription required. You can start without creating an account and receive delivery updates by email.
For Regular Users: If you send regularly or need an ongoing receive number, compare subscription terms, page allowances, and storage features against your actual usage.
For a detailed comparison of all available services, see our best online fax service guide.
If you’re currently using eFax and looking for alternatives, check out our eFax alternative guide.
Before you send a fax online, make sure your document is ready:
File format requirements:
Document quality tips: Make sure text is clear and readable, use high contrast (black text on white background), check that all pages are included, and verify signatures are visible if required.
You do not need fax software or a phone line. A current browser on Windows, macOS, ChromeOS, or Linux is enough.
Before sending from a computer:
For image-specific preparation, see How to Fax PDF and Image File Formats.
When you send a fax online, you’ll need:
Domestic fax numbers: Enter the 10-digit fax number, include area code. Example: 555-123-4567
International fax numbers: Include country code, use + before country code. Example: +44 20 1234 5678 (UK number)
For detailed international faxing instructions and country codes, see our international faxing guide.
Prefer to fax from your mobile device? Check out our mobile faxing guide for iPhone and Android instructions.
After payment, check the fax status page. A submitted or processing status is not a delivery confirmation. Check your email for the delivery result or failure notice, and keep the confirmation when receipt matters.
Fax failed to send: Check the fax status details and the recipient’s fax number before retrying. A voice phone number cannot receive a fax.
Poor quality reception: Check that every source page is clear, upright, and complete. Contact the recipient if they report unreadable pages.
No delivery confirmation: Check the fax status page and your email spam folder. If the status shows delivery but the recipient cannot find the fax, confirm the destination number with them before taking further action.
Ready to send your first fax online? Here’s what you need:
For occasional faxing, Onetime Fax offers a pay-per-use send flow. If you expect a faxed reply, get a virtual fax number first and give that number to the recipient or put it on your cover page.
Yes! Any device with a web browser can use online fax services like Onetime Fax. No special software is required.
Yes. Use your mobile browser or see our mobile faxing guide for step-by-step instructions for iPhone and Android.
No. Onetime Fax needs the recipient's fax number and your email for delivery updates. A virtual fax number is for receiving faxes.
Yes, if the destination is supported. Enter the full number with its country calling code. The form checks number format, not provider coverage; email help@onetimefax.com with the country if you need to check before paying. See our international faxing guide for details.
You can upload multi-page PDFs or combine images into a single file. Most services support multi-page documents.
Check the fax status page and delivery email. Payment or upload completion alone does not mean the recipient received it.
Verify the recipient and use a service that meets your organization’s requirements. A delivery receipt alone does not establish HIPAA or legal compliance. See our fax security guide.
Check the status details and the recipient's fax number before retrying. A voice phone number cannot receive a fax.
Yes! Online fax services operate 24/7. Just be aware of the recipient's time zone for urgent documents.
Yes. Onetime Fax offers a virtual fax number for $10 one-time for 30 days or $10/month with automatic renewal. Incoming faxes arrive as PDFs by email.