Client-side tool to generate/verify password hashes with realistic parameters. Helpful for debugging integrations and understanding how salts, memory, and iterations affect cost. Runs locally—no passwords leave your browser.
Your data security is our top priority. All hashing and verification happen in this browser. This tool does not store or send your password nor hashes outside of the browser. See source code in: https://github.com/authgear/authgear-widget-password-hash
Once dumped, copy them to multiple safe locations (cloud storage, external drives). If you lose your console's unique keys and the hardware fails, your data may be lost forever. Summary Table: otp.bin vs. seeprom.bin otp.bin seeprom.bin Size 1024 Bytes Primary Content Console Master Keys USB & Online Keys Primary Use Decrypting Internal System (NAND) Decrypting USB Storage / Online Auth Alterable? No (Hard-coded in SoC) Yes (Stored in EEPROM)
The seeprom.bin file is a dump of the .
You may be able to partially recover enough data to boot the console. However, .
Used to verify the authenticity of firmware. otp.bin seeprom.bin
Because these files contain copyrighted encryption keys unique to your specific hardware, it is illegal to download them
Without these, the emulator cannot decrypt the system files and will fail to boot or operate correctly. 4. How are They Generated? (Dumping Procedures)
import binascii def verify_seeprom(data): stored_crc = int.from_bytes(data[-2:], 'little') calc_crc = binascii.crc_hqx(data[:-2], 0xFFFF) return stored_crc == calc_crc Once dumped, copy them to multiple safe locations
# Write OTP and serial EEPROM images to the target device # - otp.bin: write once (lockable) # - seeprom.bin: updateable persistent storage
I wanted to play Splatoon Online using Pretendo. So I gave Cemu a complete dump from my Wii U + otp.bin as well as seeprom.bin.
One of the most frightening scenarios for a console owner is losing one or both of these critical files. However, depending on your situation, there are ways to recover. seeprom
# Assuming seeprom is at a specific offset on a SPI flash flashrom -p programmer --write seeprom.bin --offset 0x... --length ...
Keys used to encrypt the console's NAND (storage). Hardware Hash: Unique identification hashes.
Look for:
Understand what each binary represents before modifying: changing OTP is often impossible or risky; changing SEEPROM is powerful but must be done carefully to avoid security or compatibility issues.
While the popular Wii U emulator can run many games using generic shared keys, certain advanced features, online play replication, and homebrew development tools require your exact console keys extracted from otp.bin and seeprom.bin to function correctly. How to Dump otp.bin and seeprom.bin
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$2a$ vs $2b$), or forgetting a pepper.Privacy is important to us, so you have the option of disabling certain types of storage that may not be necessary for the basic functioning of the website. Blocking categories may impact your experience on the website.
Open source Auth0/Clerk/Firebase alternative. Passkeys, SSO, MFA, passwordless, biometric login.