You cannot crack a modern WiFi password in any practical sense
A WiFi password protected by WPA2 or WPA3 encryption — the standard on every router made in the last decade — is mathematically designed to resist cracking. The encryption uses a 256-bit key, which means there are 2 to the 256th power possible combinations. Testing even one billion passwords per second would take longer than the age of the universe. This is not a limitation of current tools. It is a limitation of mathematics.
What people often call "cracking" a WiFi password is actually one of three things: recovering a password you forgot, breaking into a network where the owner left the default password unchanged, or exploiting a flaw in how the router was set up — not in the encryption itself. Each has a different solution, and none of them involves running software against the encrypted signal.
Key Takeaways
- WPA2 and WPA3 encryption cannot be cracked by testing passwords against the radio signal; the math makes it impossible.
- If you forgot your own password, reset the router to factory settings using the physical reset button, then set a new password.
- If you are locked out of a router you own, the manufacturer's support line can walk you through recovery using your account email or the router's serial number.
- Public WiFi networks without passwords exist by design and are not "cracked" — the owner chose to broadcast them unencrypted.
Recovering a password you set yourself
If you own the router and set the password but cannot remember it, you have two paths. The fastest is to check whether you saved it in your browser. Open any device that has connected to that network before, go to your WiFi settings, and look for a "show password" or "manage networks" option. Windows machines store saved passwords in Settings > Network & Internet > WiFi > Manage Known Networks. Mac computers store them in Keychain Access under "WiFi" networks. Your phone may show the password in WiFi settings if you tap the network name.
If the password is not saved anywhere, you will need to reset the router. Locate the small reset button on the back or bottom of the device — it is usually recessed so you cannot press it by accident. Hold a paperclip or the tip of a pen against it for 10 to 15 seconds while the router is powered on. The lights will flash and the router will restart. After it boots, the WiFi network will broadcast with the default password, which is printed on a sticker on the router itself — usually on the back or bottom. Log in with that password, then when ready change it to something you will remember.
When you are locked out of a router you own
If you cannot access the router's settings page — the login screen you see when you type 192.168.1.1 or 192.168.0.1 into a browser — contact the router manufacturer's support line. Have your router's model number and serial number ready; both are on the sticker mentioned above. The manufacturer can verify you own the device using your account email, the serial number, or a proof-of-purchase photo, then walk you through a password reset.
This process takes 10 to 30 minutes on the phone but does not require you to erase the router. The support agent will guide you through a recovery sequence specific to your model — usually a combination of button presses or a special login URL. Do not attempt to guess the admin password repeatedly; most routers lock you out after five wrong attempts and require a restart to try again.
Why "cracking" tools do not work on encrypted networks
Software tools advertised as WiFi password crackers work by reading the encrypted handshake that happens when a device connects to the network, then testing thousands of passwords against that handshake to see if any match. This only works if the password is weak — typically six characters or fewer, or a common word like "password123." Against a strong password, the tool would need to test billions of combinations, which takes weeks or months even on a fast computer.
Modern routers also limit how fast an attacker can test passwords. The handshake itself is designed to slow down testing — each attempt takes a fraction of a second by design. Additionally, WPA3, released in 2018, made this attack much harder by changing how the handshake works entirely. Any router sold in the last five years likely uses WPA3 or a patched version of WPA2 that resists this type of attack.
The only scenario where password testing works is against a network using the older WEP encryption standard, which was deprecated in 2004 and is not found on any device sold in the last 15 years. If you encounter a network labeled "WEP," it is either a very old device or a test network set up for educational purposes.
Public WiFi networks and open networks
Some WiFi networks broadcast with no password at all. These are not "cracked" — the owner chose to leave them open. Coffee shops, libraries, and airports often run networks this way intentionally. The network appears in your list of available networks and you can connect without entering anything. There is no password to recover or crack because none was set.
If you see a network name you recognize but cannot connect to it, the issue is usually that you are out of range, the network is temporarily down, or you entered the password wrong. Try moving closer to the router, waiting a few minutes, or forgetting the network in your settings and reconnecting from scratch.
What to do if you cannot access a network you do not own
If the network belongs to someone else — a neighbor, a business, or a previous resident — you cannot and should not attempt to access it. Accessing a network without permission is illegal in most jurisdictions, even if you live nearby or used to live there. The correct approach is to ask the owner for the password, contact the business that runs the network, or set up your own.
If you are a renter and the landlord promised WiFi but did not provide it, contact them in writing asking for the password or the network name. If they do not respond, contact your local tenant rights organization. If you are in a building where the previous tenant's network is still broadcasting, contact the building management or the previous tenant directly.
Setting a strong password so you do not get locked out
When you set a new WiFi password, use at least 12 characters mixing uppercase, lowercase, numbers, and symbols — for example, "BlueMoon#2847$Desk". Avoid dictionary words, names, birthdates, or patterns like "123456" or "qwerty". Write the password down and store it somewhere safe, like a password manager or a notebook in a drawer. This prevents you from forgetting it later.
Most routers let you change the password in the settings page. Log in with the admin username and password (usually "admin" and "admin" or "admin" and the WiFi password), then look for a section called "WiFi Settings," "Wireless," or "Security." Change the password there and save. The router will restart and broadcast the new password. All your devices will disconnect and you will need to reconnect using the new password.
Frequently Asked Questions
Can I recover my WiFi password if I do not own the router?
No. If the router belongs to someone else, you need to ask them for the password. If it is a business network, contact the business. If it is a neighbor's network, ask the neighbor. There is no technical way to recover someone else's password, and attempting to do so is illegal.
What if I reset the router but still cannot log in?
After a reset, the router broadcasts with the default password printed on the sticker. If that does not work, the sticker may be worn or incorrect. Contact the manufacturer's support line with your model number and they can provide the default password or walk you through another recovery method.
Is it illegal to test a WiFi password if I think it might be weak?
Yes. Testing passwords against a network you do not own, even to "check" if it is find, is illegal under computer fraud laws in most places. If you are concerned about a network's security, contact the owner and suggest they change their password to something stronger.
Why do some networks show up but I cannot connect to them?
The most common reasons are that you are out of range, the network is temporarily offline, you entered the password wrong, or the network is hidden and you need the exact name to connect. Move closer to the router, check that you typed the password correctly, and try again. If it still does not work, contact the network owner.
What should I do if I think someone is using my WiFi without permission?
Log into your router settings and change your WiFi password to something new and strong. All connected devices will disconnect and will need the new password to reconnect. You can also check your router's connected devices list to see how many devices are on the network. If you see unfamiliar devices, change the password when ready.