What is spf.io?

Spf.io (pronounced spiffy-oh) is software that enables people to access events in many languages through real-time captions and translations. It uses prepared content and live spoken speech to deliver a seamless translated and accessible experience.

How it worksWatch a demo
Spf.io Online

Display translation for multiple languages simultaneously

It’s easy to add more languages as your audience needs grow.

Control the delivery of translations with the tap of a button

Control the display of slides and multilingual subtitles from a single device.

Deliver slides and captions to mobile devices and projectors

Audience members can choose to read or listen to the translation. No wireless headsets to manage or apps to download.


Stream audio interpretation to mobile devices

If you use human interpreters, audience members can receive the interpretation (both text and speech) on their mobile devices.


Automated translation at your fingertips

Whether you’ve prepared a script or just have microphone audio, you can provide captions and translation for your event with spf.io.

Have access to automatic translation in over


How It Works

What equipment do I need for spf.io?

Here are the minimum technical requirements:

  1. A computer running Google Chrome (1.6 GHz Dual-core CPU with 4GB RAM / 4GB Free disk space)
  2. Reliable internet with 1 Mbps upload/download speed during the event (a wired ethernet connection is best!)
  3. Microphone audio output from the venue soundboard to the computer

1. Upload prepared materials


Prepared Translations

(if you have it)

Single Control

Set up the device that will control the display of translations and slides.

Connect a microphone

to spf.io for automatic captions and translation.


Show up to 3 languages on a single projector.

Mobile Devices

Your audience visits the event URL to receive translation.

Provide subtitles no matter how much (or how little) prepared content you have.

High Preparation

Provide an amazing translation experience to your audience by loading your script, slides, and translations into spf.io beforehand.

Medium Preparation

Load your manuscript into spf.io before the event and get it auto-translated with the click of a button.

Low Preparation

No manuscript? No worries! Just plug the microphone audio into a computer running spf.io and monitor the live captioning/translation.

Watch a demo video

Ready to try it out?

Get started today to begin creating transformative multilingual experiences.

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Submit your information and get periodic updates on multilingual accessibility with spf.io.

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