To share a WiFi password to another device without typing it out or using a QR code, use chirpfile: open chirpfile.com on both devices, paste the password on the device that has it, and the other device picks up the audio signal through its microphone. WiFi passwords are under 120 characters so they travel as pure sound - no server, no upload, no internet needed on either device. Works across iPhone, Android, Mac, and Windows, with no account, install, or shared ecosystem required.
How it works
1
Type or paste the WiFi password
Open chirpfile.com on the device that knows the password. Paste it into the text field.
2
It plays as a short sound
The password encodes into a 1-2 second audio signal. In ultrasonic mode, it's inaudible.
3
The other device hears it
The receiving device picks up the chirp through its mic and displays the password, ready to copy.
No server. No internet. Purely acoustic.
WiFi passwords are under 120 characters, which means they take the purely acoustic path - no relay, no upload, no server, no internet required on either device. The password exists as a sound wave for about 1.5 seconds and nowhere else. Nothing is logged, nothing is stored, nothing touches a server.
When you need this
New iPhone that isn't on WiFi yet
Can't receive an AirDrop without WiFi. Can't use Apple's password sharing across different Apple IDs. Open chirpfile.com over cellular, hear the chirp, connect.
Android device that can't reach an Apple keychain
Apple's WiFi password sharing only works between Apple devices. chirpfile works between anything.
Sharing with a guest's device
No need to read the password aloud, spell it out, or text it. Chirp it in two seconds.
Work device with no shared account
You know the WiFi password but there's no shared keychain or cloud account to sync through. chirpfile bridges the gap with sound.
Try it now
Open chirpfile.com on two devices. Type any short text. Hit send.
How do I share a WiFi password from iPhone to Android?
Apple's built-in WiFi password sharing only works between Apple devices signed in with Apple IDs in each other's contacts. To share from iPhone to Android, open chirpfile.com on both devices, paste the password on the iPhone, and the Android phone hears the audio signal through its microphone and displays the password. Works the same way in either direction (Android to iPhone, Mac to Windows, any combination).
Is there an alternative to a QR code for sharing WiFi passwords?
Yes - chirpfile uses sound instead of a QR code. Advantages: no camera focus, no need to hold the phone up to a screen, works when the receiving phone is in a pocket, works over speakerphone or a video call. WiFi passwords are short enough to travel purely acoustically with no server or internet involved.
Does the WiFi password go through your servers?
No. Text under 120 characters - which covers every WiFi password - encodes directly into the audio signal. Zero servers, zero relay, zero network. Purely acoustic.
The receiving device isn't on WiFi yet - how does it run chirpfile.com?
It needs some internet connection - cellular works. Open chirpfile.com over cellular, hear the chirp, get the password, connect to WiFi.
Can I use this for other passwords or codes too?
Yes. Any text under 120 characters - OTP codes, login passwords, door codes, one-off URLs, short API keys - takes the same purely acoustic zero-server path.